• Re: binary voltage multiplier

    From Anthony William Sloman@21:1/5 to jla...@highlandsniptechnology.com on Mon Jul 25 18:44:14 2022
    On Tuesday, July 26, 2022 at 11:27:57 AM UTC+10, jla...@highlandsniptechnology.com wrote:
    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    https://en.wikipedia.org/wiki/Cockcroft%E2%80%93Walton_generator

    If you are going to re-invent the wheel, find a better name for it. Voltage doubler is less pretentious than "binary voltage multiplier".

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to All on Mon Jul 25 18:27:47 2022
    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Robertson@21:1/5 to Anthony William Sloman on Mon Jul 25 23:20:25 2022
    On 2022/07/25 6:44 p.m., Anthony William Sloman wrote:
    On Tuesday, July 26, 2022 at 11:27:57 AM UTC+10, jla...@highlandsniptechnology.com wrote:
    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    https://en.wikipedia.org/wiki/Cockcroft%E2%80%93Walton_generator

    If you are going to re-invent the wheel, find a better name for it. Voltage doubler is less pretentious than "binary voltage multiplier".


    Well, he is getting more than double the voltage out of the Walton
    generator, depending on which switches are closed. I've called this a
    charge pump supply, but perhaps I was using the wrong name. Nice to know
    the actual name of this style of voltage multiplier.

    Someone should ask "Kathy Loves Physics" (youtube) to do an episode on
    the voltage multiplier as most of her presentations relate to electricity...

    John :-#)#

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Tue Jul 26 08:58:39 2022
    jlarkin@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Tue Jul 26 07:03:38 2022
    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Tue Jul 26 06:59:21 2022
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs

    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    I probably won't actually do this, unless a certain customer gets
    serious, which is unlikely. I was just doodling.

    We could go into the multichannel high-voltage supply business with
    our new power rack, but lots of people are in that biz already.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to langwadt@fonz.dk on Tue Jul 26 07:19:47 2022
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1 >> >>
    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.) >> >
    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Tue Jul 26 10:59:31 2022
    jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.) >>
    Cheers

    Phil Hobbs

    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    I probably won't actually do this, unless a certain customer gets
    serious, which is unlikely. I was just doodling.

    We could go into the multichannel high-voltage supply business with
    our new power rack, but lots of people are in that biz already.


    You still only get N-times multiplication at most, though. The 2**N multiplication scheme runs each voltage doubler off the output of the
    previous one.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to Phil Hobbs on Tue Jul 26 11:21:49 2022
    Phil Hobbs wrote:
    jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1 >>>>
    Fun.  Of course with the right parts, you can do 2**N multiplication
    with N stages.  (Does require using the relays for commutation, of
    course.)

    Cheers

    Phil Hobbs

    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    I probably won't actually do this, unless a certain customer gets
    serious, which is unlikely. I was just doodling.

    We could go into the multichannel high-voltage supply business with
    our new power rack, but lots of people are in that biz already.


    You still only get N-times multiplication at most, though.  The 2**N multiplication scheme runs each voltage doubler off the output of the previous one.

    (We're using different definitions of N here, of course--I'm talking N
    CW sections and you're talking N relays, with the nth one switching 2^n sections, for 0 <= n < N.)

    Cheers

    Phil Hobbs


    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to jlarkin@highlandsniptechnology.com on Tue Jul 26 21:53:08 2022
    On 7/26/2022 10:19 AM, jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1 >>>>>
    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.) >>>>
    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to bitrex on Wed Jul 27 02:08:41 2022
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <user@example.net> wrote:

    On 7/26/2022 10:19 AM, jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1 >>>>>>
    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.

    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to jlarkin@highlandsniptechnology.com on Wed Jul 27 20:54:31 2022
    On 7/27/2022 5:08 AM, jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <user@example.net> wrote:

    On 7/26/2022 10:19 AM, jlarkin@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1 >>>>>>>
    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >>>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.

    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.

    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.

    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so and those CUI-type modules can
    take you most places you need to go initially from there, on the board.
    The client can use their UL-listed off-line PSU of choice if that's
    important to them.

    I forget exactly how many units UL wants to test to destruction these
    days just as a minimum requirement for a cert I think it's at least three.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Wed Jul 27 23:35:12 2022
    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >>>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to Lasse Langwadt Christensen on Thu Jul 28 10:16:22 2022
    On 7/28/2022 2:35 AM, Lasse Langwadt Christensen wrote:
    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >>>>>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684


    Dat's a beefy brick.

    The downside from a user's perspective is once you start trying to rack
    up a number of boxes with wall warts and external bricks you start
    wishing they had internal PSUs again, kettle leads and IECs are much
    more pleasant from a cable management perspective

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to langwadt@fonz.dk on Thu Jul 28 07:23:14 2022
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >> >>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >> >>>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Thu Jul 28 10:46:12 2022
    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage, >>>>>>>> cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Thu Jul 28 08:35:59 2022
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs

    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Thu Jul 28 08:33:17 2022
    torsdag den 28. juli 2022 kl. 16.23.22 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >> >>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >> >>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >> >>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >> >>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >> >>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684
    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    lots of 65W USB-C chargers like this: https://www.pricerunner.dk/product/640x640/3002755304/Baseus-GaN2-Lite-Quick-Charge-Travel-Charger.jpg

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to langwadt@fonz.dk on Thu Jul 28 08:38:40 2022
    On Thu, 28 Jul 2022 08:33:17 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 16.23.22 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >> >> >
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >> >> >>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >> >> >>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >> >> >>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >> >> >>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684
    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    lots of 65W USB-C chargers like this: https://www.pricerunner.dk/product/640x640/3002755304/Baseus-GaN2-Lite-Quick-Charge-Travel-Charger.jpg

    Yikes. GaN fets are changing things. I wonder what the switching
    frequency is.

    What's the output voltage? Surely not 5.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Thu Jul 28 11:46:01 2022
    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication >>>>>>>>>>> with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>> LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too >>>>> much thought on how to provide an appropriate reference and error amp >>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs

    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the problem... no complaints from the users.

    Yeah, we use warts too. Our standard one is an SL Power ME10A2403B01,
    which comes with international plug adapters. It's overkill for most of
    our stuff, except for some of the beefier TE coolers.


    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    Very pretty.


    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    It's a drag when those fall out, for sure.


    Cheers

    Phil Hobbs
    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Thu Jul 28 11:08:39 2022
    torsdag den 28. juli 2022 kl. 17.38.47 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 08:33:17 -0700 (PDT), Lasse Langwadt Christensen <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 16.23.22 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >> >> >
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >> >> the 70s I think it was, for regulation on the secondary is to wrap an >> >> LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too >> >> much thought on how to provide an appropriate reference and error amp >> >> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >> >> > Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >> >> > and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684
    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    lots of 65W USB-C chargers like this: https://www.pricerunner.dk/product/640x640/3002755304/Baseus-GaN2-Lite-Quick-Charge-Travel-Charger.jpg
    Yikes. GaN fets are changing things. I wonder what the switching
    frequency is.

    What's the output voltage? Surely not 5.

    The 65W is at 20V
    the USB-C is "Power Delivery", so it starts at as normal USB 5V/900mA
    and then as requested switches to 5,9,12,15 or 20V little over 3A

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to langwadt@fonz.dk on Thu Jul 28 11:23:14 2022
    On Thu, 28 Jul 2022 11:08:39 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.38.47 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 08:33:17 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 16.23.22 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >> >> >> > doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >> >> >> the 70s I think it was, for regulation on the secondary is to wrap an >> >> >> LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too >> >> >> much thought on how to provide an appropriate reference and error amp >> >> >> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >> >> >> > Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >> >> >> > and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684
    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    lots of 65W USB-C chargers like this: https://www.pricerunner.dk/product/640x640/3002755304/Baseus-GaN2-Lite-Quick-Charge-Travel-Charger.jpg
    Yikes. GaN fets are changing things. I wonder what the switching
    frequency is.

    What's the output voltage? Surely not 5.

    The 65W is at 20V
    the USB-C is "Power Delivery", so it starts at as normal USB 5V/900mA
    and then as requested switches to 5,9,12,15 or 20V little over 3A


    I need to look into that. I'm thinking about a product line of little
    blue box signal conditioners, aerospace things, and a USB power
    connector would be cool. But I think some negotiation has to be done
    to get more than the minimum 5 watts. And maybe some older PCs and
    laptops can't do more.

    There's probably a good book somewhere.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Thu Jul 28 11:15:27 2022
    torsdag den 28. juli 2022 kl. 17.36.08 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>> LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too >>>> much thought on how to provide an appropriate reference and error amp >>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs
    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Thu Jul 28 11:58:23 2022
    torsdag den 28. juli 2022 kl. 20.23.24 UTC+2 skrev John Larkin:
    On Thu, 28 Jul 2022 11:08:39 -0700 (PDT), Lasse Langwadt Christensen <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.38.47 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 08:33:17 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 16.23.22 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >> >> >> >>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >> >> >> >>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >> >> >> > doubler.
    Ya that sounds right. An old trick in the National Semi handbook from
    the 70s I think it was, for regulation on the secondary is to wrap an
    LM317 inside the grid to cathode voltage of a power triode and that >> >> >> works OK for regulating up to a couple kV at low currents without too
    much thought on how to provide an appropriate reference and error amp
    for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >> >> >> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684
    Phihomg and MeanWell make warts (big plugs) at 60 watts.

    lots of 65W USB-C chargers like this: https://www.pricerunner.dk/product/640x640/3002755304/Baseus-GaN2-Lite-Quick-Charge-Travel-Charger.jpg
    Yikes. GaN fets are changing things. I wonder what the switching
    frequency is.

    What's the output voltage? Surely not 5.

    The 65W is at 20V
    the USB-C is "Power Delivery", so it starts at as normal USB 5V/900mA
    and then as requested switches to 5,9,12,15 or 20V little over 3A

    I need to look into that. I'm thinking about a product line of little
    blue box signal conditioners, aerospace things, and a USB power
    connector would be cool. But I think some negotiation has to be done
    to get more than the minimum 5 watts. And maybe some older PCs and
    laptops can't do more.

    yes you need a pile of software* or a dedicated chip like these: https://www.amazon.com/Type-C-Trigger-Module-Supports-Output/dp/B08LDJBN8P/

    it of course ties up the USB, but that doesn't really matter because so far I haven't seen any PCs or laptops
    that supports more that the normal 5V output, only seen chargers and powerbanks that does that

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Mike Monett@21:1/5 to Lasse Langwadt Christensen on Thu Jul 28 18:57:19 2022
    Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.38.47 UTC+2 skrev

    [...]

    What's the output voltage? Surely not 5.

    The 65W is at 20V
    the USB-C is "Power Delivery", so it starts at as normal USB 5V/900mA
    and then as requested switches to 5,9,12,15 or 20V little over 3A

    Amazon sells a 5V 12A USB charger for CDN$26.99:

    https://www.amazon.ca/Charger-Rolvse-Charging-Station- Compatible/dp/B09JWR84QF/

    I don't need that much for my desk lamp, so I got a 32W version for
    CDN$16.99:

    https://www.amazon.ca/gp/product/B09R9RMV79

    So they do exist.

    However, USB-C cannot take the current:

    https://m.media-amazon.com/images/I/61i8joCjpiL._CR0,204,1224,1224
    _UX175.jpg



    --
    MRM

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Thu Jul 28 19:19:56 2022
    On Thu, 28 Jul 2022 11:46:01 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a >>>>>>>>> standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>>> LM317 inside the grid to cathode voltage of a power triode and that >>>>>> works OK for regulating up to a couple kV at low currents without too >>>>>> much thought on how to provide an appropriate reference and error amp >>>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >>>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >>>>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs

    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the
    problem... no complaints from the users.

    Yeah, we use warts too. Our standard one is an SL Power ME10A2403B01,
    which comes with international plug adapters. It's overkill for most of
    our stuff, except for some of the beefier TE coolers.


    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    Very pretty.

    Ugly. They insisted on black anodize. Highland Blue would have been
    much better.

    The LCD is an eval board. We couldn't get the lcd or the driver chips,
    but lots of eval boards are available.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to langwadt@fonz.dk on Thu Jul 28 19:21:28 2022
    On Thu, 28 Jul 2022 11:15:27 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.36.08 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >> >>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >> >>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >> >>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >> >>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave
    doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >> >>>> the 70s I think it was, for regulation on the secondary is to wrap an >> >>>> LM317 inside the grid to cathode voltage of a power triode and that
    works OK for regulating up to a couple kV at low currents without too >> >>>> much thought on how to provide an appropriate reference and error amp >> >>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >> >>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight
    and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty
    readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs
    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the
    problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking

    XLRs are great. I never understood why a microphone connector has,
    like, 10 amp pins. What SPL makes 10 amps?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Clifford Heath@21:1/5 to jlarkin@highlandsniptechnology.com on Fri Jul 29 12:41:03 2022
    On 29/7/22 12:21, jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 11:15:27 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.36.08 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen >>>>> <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>>>> LM317 inside the grid to cathode voltage of a power triode and that >>>>>>> works OK for regulating up to a couple kV at low currents without too >>>>>>> much thought on how to provide an appropriate reference and error amp >>>>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >>>>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >>>>>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation. >>>> The one over my bench is a very nice 20x Tripplite one, with filtering >>>> and MOVs, but the prongs are oriented horizontally, so that most warts >>>> take up two spaces.

    Cheers

    Phil Hobbs
    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the
    problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking

    XLRs are great. I never understood why a microphone connector has,
    like, 10 amp pins. What SPL makes 10 amps?

    In the case of stage gear, it's not the amps, it's the newtons that
    matter. Specifically of a drunk rock-star tripping over a cable without interrupting whatever horrendous din they're making at the time.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to no_spam@please.net on Thu Jul 28 20:44:37 2022
    On Fri, 29 Jul 2022 12:41:03 +1000, Clifford Heath
    <no_spam@please.net> wrote:

    On 29/7/22 12:21, jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 11:15:27 -0700 (PDT), Lasse Langwadt Christensen
    <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.36.08 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen >>>>>> <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>> On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>>>>> LM317 inside the grid to cathode voltage of a power triode and that >>>>>>>> works OK for regulating up to a couple kV at low currents without too >>>>>>>> much thought on how to provide an appropriate reference and error amp >>>>>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>>>>> Lately we don't run line AC into boxes, or use line frequency >>>>>>>>> transformers. Too many safety and compliance isues, too much weight >>>>>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >>>>>>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation. >>>>> The one over my bench is a very nice 20x Tripplite one, with filtering >>>>> and MOVs, but the prongs are oriented horizontally, so that most warts >>>>> take up two spaces.

    Cheers

    Phil Hobbs
    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into >>>> the box. An external 24 volt 2.5-amp laptop-type supply just fixed the >>>> problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded >>>> for optional mechanical locking.

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking

    XLRs are great. I never understood why a microphone connector has,
    like, 10 amp pins. What SPL makes 10 amps?

    In the case of stage gear, it's not the amps, it's the newtons that
    matter. Specifically of a drunk rock-star tripping over a cable without >interrupting whatever horrendous din they're making at the time.

    I think they are beer-proof too.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to jlarkin@highlandsniptechnology.com on Fri Jul 29 08:09:54 2022
    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 11:46:01 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen >>>>> <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen >>>>>>>>>> <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which >>>>>>>>>> would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong. >>>>>>>>>>
    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>>>> LM317 inside the grid to cathode voltage of a power triode and that >>>>>>> works OK for regulating up to a couple kV at low currents without too >>>>>>> much thought on how to provide an appropriate reference and error amp >>>>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>>>> Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >>>>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >>>>>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation. >>>> The one over my bench is a very nice 20x Tripplite one, with filtering >>>> and MOVs, but the prongs are oriented horizontally, so that most warts >>>> take up two spaces.

    Cheers

    Phil Hobbs

    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the
    problem... no complaints from the users.

    Yeah, we use warts too. Our standard one is an SL Power ME10A2403B01,
    which comes with international plug adapters. It's overkill for most of
    our stuff, except for some of the beefier TE coolers.


    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    Very pretty.

    Ugly. They insisted on black anodize. Highland Blue would have been
    much better.

    The LCD is an eval board. We couldn't get the lcd or the driver chips,
    but lots of eval boards are available.

    We're going in the DKNY direction ourselves--machined brass and black powder-coated steel.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Gerhard Hoffmann@21:1/5 to All on Fri Jul 29 14:57:35 2022
    Am 29.07.22 um 14:09 schrieb Phil Hobbs:

    We're going in the DKNY direction ourselves--machined brass and black powder-coated steel.

    Coating with black powder?

    Cheers


    Gerhard


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to Gerhard Hoffmann on Fri Jul 29 09:55:26 2022
    Gerhard Hoffmann wrote:
    Am 29.07.22 um 14:09 schrieb Phil Hobbs:

    We're going in the DKNY direction ourselves--machined brass and black
    powder-coated steel.

    Coating with black powder?

    Cheers


      Gerhard


    Note the hyphen. ;)

    However, we do thing they're the bomb.

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs
    Principal Consultant
    ElectroOptical Innovations LLC / Hobbs ElectroOptics
    Optics, Electro-optics, Photonics, Analog Electronics
    Briarcliff Manor NY 10510

    http://electrooptical.net
    http://hobbs-eo.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Fri Jul 29 07:51:13 2022
    fredag den 29. juli 2022 kl. 04.21.36 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 11:15:27 -0700 (PDT), Lasse Langwadt Christensen <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 17.36.08 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote:

    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote:
    On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could
    interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries:

    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >> >>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >> >>>> the 70s I think it was, for regulation on the secondary is to wrap an >> >>>> LM317 inside the grid to cathode voltage of a power triode and that >> >>>> works OK for regulating up to a couple kV at low currents without too >> >>>> much thought on how to provide an appropriate reference and error amp >> >>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess.
    Lately we don't run line AC into boxes, or use line frequency
    transformers. Too many safety and compliance isues, too much weight >> >>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >> >>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation.
    The one over my bench is a very nice 20x Tripplite one, with filtering
    and MOVs, but the prongs are oriented horizontally, so that most warts
    take up two spaces.

    Cheers

    Phil Hobbs
    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into
    the box. An external 24 volt 2.5-amp laptop-type supply just fixed the
    problem... no complaints from the users.

    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    It pulls about 2 amps until the giant EOM oven heats up, maybe 15
    minutes.

    The power connector on the back is the usual barrel, but it's threaded
    for optional mechanical locking.

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,
    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    I never understood why a microphone connector has,
    like, 10 amp pins. What SPL makes 10 amps?

    it needs to be musician and roadie proof. It has also been used for connecting spekers

    Now replaced with Speakon with is up to 8 pins, 40A rated, and the pins are inside where you can't touch them

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to pcdhSpamMeSenseless@electrooptical. on Fri Jul 29 11:28:18 2022
    On Fri, 29 Jul 2022 08:09:54 -0400, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 11:46:01 -0400, Phil Hobbs
    <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Thu, 28 Jul 2022 10:46:12 -0400, Phil Hobbs
    <pcdhSpamMeSenseless@electrooptical.net> wrote:

    jlarkin@highlandsniptechnology.com wrote:
    On Wed, 27 Jul 2022 23:35:12 -0700 (PDT), Lasse Langwadt Christensen >>>>>> <langwadt@fonz.dk> wrote:

    torsdag den 28. juli 2022 kl. 02.54.38 UTC+2 skrev bitrex:
    On 7/27/2022 5:08 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>> On Tue, 26 Jul 2022 21:53:08 -0400, bitrex <us...@example.net> wrote: >>>>>>>>>
    On 7/26/2022 10:19 AM, jla...@highlandsniptechnology.com wrote: >>>>>>>>>>> On Tue, 26 Jul 2022 07:03:38 -0700 (PDT), Lasse Langwadt Christensen
    <lang...@fonz.dk> wrote:

    tirsdag den 26. juli 2022 kl. 15.59.31 UTC+2 skrev jla...@highlandsniptechnology.com:
    On Tue, 26 Jul 2022 08:58:39 -0400, Phil Hobbs
    <pcdhSpamM...@electrooptical.net> wrote:

    jla...@highlandsniptechnology.com wrote:

    https://www.dropbox.com/s/wyd29ukhfm27rsj/Binary_CW_Multplier.jpg?raw=1

    Fun. Of course with the right parts, you can do 2**N multiplication
    with N stages. (Does require using the relays for commutation, of course.)

    Cheers

    Phil Hobbs
    This circuit can do a 2^N step high-voltage supply with N low voltage,
    cheap telecom relays. Maybe an incremental linear reg could >>>>>>>>>>>>> interpolate between the steps.

    regulate the input?

    Sure. The source could be something like an LTC3803 (geat part) and a
    standard transformer, one of the DRQ things.

    We had one inquiry for a HV supply that was pretty time-agile, which
    would need a linear reg.

    Frankly, I'd rather not be in the HV business. Too much to go wrong.

    This stepped C-W was just a goofy idea.

    This topology uses isolation transformers with dual secondaries: >>>>>>>>>>
    <https://imgur.com/a/XRoYq2V>

    I _think_ I got the dots right...

    I think that untangles into a 360 volt transformer and a half-wave >>>>>>>>> doubler.
    Ya that sounds right. An old trick in the National Semi handbook from >>>>>>>> the 70s I think it was, for regulation on the secondary is to wrap an >>>>>>>> LM317 inside the grid to cathode voltage of a power triode and that >>>>>>>> works OK for regulating up to a couple kV at low currents without too >>>>>>>> much thought on how to provide an appropriate reference and error amp >>>>>>>> for the potentials on that side.

    Long lead times on many N fets with Vds > 1kV, not surprising I guess. >>>>>>>>> Lately we don't run line AC into boxes, or use line frequency >>>>>>>>> transformers. Too many safety and compliance isues, too much weight >>>>>>>>> and cost.
    Yep. Laptop-style external bricks in 24-ish and 48 volts are pretty >>>>>>>> readily available up to 100 watts or so

    much more than that, e.g. https://www.digikey.dk/en/products/detail/mean-well-usa-inc/GST280A24-C6P/7703684

    Phihomg and MeanWell make warts (big plugs) at 60 watts.


    All you need is a power bar with the outlets in the right orientation. >>>>> The one over my bench is a very nice 20x Tripplite one, with filtering >>>>> and MOVs, but the prongs are oriented horizontally, so that most warts >>>>> take up two spaces.

    Cheers

    Phil Hobbs

    We're shipping rackmount boxes to a big govt facility. They have a
    group in charge of safety and compliance and all that stuff and would
    have set us back 6 months and maybe $40K in lab fees if we ran AC into >>>> the box. An external 24 volt 2.5-amp laptop-type supply just fixed the >>>> problem... no complaints from the users.

    Yeah, we use warts too. Our standard one is an SL Power ME10A2403B01,
    which comes with international plug adapters. It's overkill for most of >>> our stuff, except for some of the beefier TE coolers.


    https://www.dropbox.com/s/vjzhoths9v55gpq/Man_Front_1.jpg?raw=1

    Very pretty.

    Ugly. They insisted on black anodize. Highland Blue would have been
    much better.

    The LCD is an eval board. We couldn't get the lcd or the driver chips,
    but lots of eval boards are available.

    We're going in the DKNY direction ourselves--machined brass and black >powder-coated steel.

    Cheers

    Phil Hobbs

    Here's the first unit of a new product. The front panel is powder
    coated on the front and all edges, but still conductive bare aluminum
    on its back side.

    Protocase made us 10 of these in something like 5 days. They do
    beautiful work.

    https://www.dropbox.com/sh/d908mumrhoglz1v/AACGXlgZ2edfG0rLsxbdMPWMa?dl=0

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Allison@21:1/5 to lang...@fonz.dk on Fri Jul 29 17:21:33 2022
    lang...@fonz.dk wrote:
    ====================

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,

    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.
    It was specially designed for use with microphones with a smooth, streamlined shape.

    https://www.switchcraft.com/a-series-3-pin-xlr-female-cable-mount-silver-pins-nickel/a3f/

    While Neutrik Speakons are fine, the many clones are not and fail to connect after a short period of use.
    The similar "PowerCons" are flat out dangerous.


    ..... Phil

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Sat Jul 30 01:33:10 2022
    lørdag den 30. juli 2022 kl. 02.21.36 UTC+2 skrev palli...@gmail.com:
    lang...@fonz.dk wrote:
    ====================

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,
    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    I prefer the Neutrik and I haven't seen anyone use the Cannon style for 30 years

    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws
    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.
    It was specially designed for use with microphones with a smooth, streamlined shape.

    I'm taking about this nonsense https://en.wikipedia.org/wiki/XLR_connector#/media/File:Xlr-connectors.jpg

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Allison@21:1/5 to lang...@fonz.dk on Sat Jul 30 02:42:17 2022
    lang...@fonz.dk wrote:
    ====================


    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,

    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    I prefer the Neutrik and I haven't seen anyone use the Cannon style for 30 years

    ** Good for YOU - BTW, it proves nothing.


    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.

    It was specially designed for use with microphones with a smooth, streamlined shape.

    I'm taking about this nonsense https://en.wikipedia.org/wiki/XLR_connector#/media/File:Xlr-connectors.jpg


    ** Hate to be the one to tell ya this - but the are not made by "Cannon".
    Merely cheap XLR style clones made in Asia.

    FYI:

    Originals had slot headed screws on the saddle and the name Cannon embossed on ( black or grey) inserts.
    Not only outlast the mics they were bought for, but often enough the the owners too.




    ..... Phil

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Lasse Langwadt Christensen@21:1/5 to All on Sat Jul 30 04:53:08 2022
    lørdag den 30. juli 2022 kl. 11.42.20 UTC+2 skrev palli...@gmail.com:
    lang...@fonz.dk wrote:
    ====================


    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,

    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    I prefer the Neutrik and I haven't seen anyone use the Cannon style for 30 years
    ** Good for YOU - BTW, it proves nothing.
    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.

    It was specially designed for use with microphones with a smooth, streamlined shape.

    I'm taking about this nonsense https://en.wikipedia.org/wiki/XLR_connector#/media/File:Xlr-connectors.jpg

    ** Hate to be the one to tell ya this - but the are not made by "Cannon". Merely cheap XLR style clones made in Asia.

    https://www.farnell.com/datasheets/723541.pdf

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Joe Gwinn@21:1/5 to pallison49@gmail.com on Sat Jul 30 14:26:32 2022
    On Fri, 29 Jul 2022 17:21:33 -0700 (PDT), Phil Allison
    <pallison49@gmail.com> wrote:

    lang...@fonz.dk wrote:
    ====================

    the big Meanwell comes with an 8 pin minifit-jr or 4 pin XLR, both are locking
    XLRs are great.

    ye as long as it is the Neutrik style, easy to assemble excellent strain relief,

    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.
    It was specially designed for use with microphones with a smooth, streamlined shape.

    https://www.switchcraft.com/a-series-3-pin-xlr-female-cable-mount-silver-pins-nickel/a3f/

    In the late 1960s to early 1970s, I was a sound man and electrician in
    various stage productions. All the XLRs I ever saw (and installed)
    were made by Switchcraft, and these were just bulletproof.

    They were what one used for low-impedance microphone cables.

    I've at least looked at the Neutrik XLRs, but I've never used or
    installed them.


    While Neutrik Speakons are fine, the many clones are not and fail to connect after a short period of use.
    The similar "PowerCons" are flat out dangerous.

    Dangerous in what sense? (I have no personal experience here.).

    Joe Gwinn

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  • From Phil Allison@21:1/5 to Joe Gwinn on Sat Jul 30 16:14:40 2022
    Joe Gwinn wrote:
    ==============

    ** Neutrik "XLRs" are fragile compared to Cannon types, the plastic screw up strain relief works loose and will break if trodden on.

    nothing like the old Cannon/Switchcraft stuff with all sorts of tiny screws

    ** The Switchraft head locking screw is captured and the whole plug is damn near unbreakable.
    It was specially designed for use with microphones with a smooth, streamlined shape.

    https://www.switchcraft.com/a-series-3-pin-xlr-female-cable-mount-silver-pins-nickel/a3f/


    In the late 1960s to early 1970s, I was a sound man and electrician in various stage productions. All the XLRs I ever saw (and installed)
    were made by Switchcraft, and these were just bulletproof.


    ** All the ones I saw back then were " Cannon " made here in Australia.
    3 pin EXP and XLR types, plus a few LNEs for AC power.
    Switchcraft were a rare sight or came packed with Shure SM xx mics.

    While Neutrik Speakons are fine, the many clones are not and fail to connect after a short period of use.
    The similar "PowerCons" are flat out dangerous.

    Dangerous in what sense? (I have no personal experience here.).


    ** They are NOT safety approved for use outside of a professional installation situation.
    Three reasons exist:

    1. Not safe for disconnection while under load - may arc and burn.
    2. Will come apart when twisted anti-clockwise exposing live parts.
    3. So similar to a Speakon connector folk try to use them with one, forcing it in making a lethal connection.

    Should not be supplied to the public, but are seen on items that are sold to anyone - ie compact self powered speakers.


    ...... Phil

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  • From Phil Allison@21:1/5 to Phil Allison on Sat Jul 30 16:48:46 2022
    Phil Allison wrote:
    =================

    ** Ooops.

    ** All the ones I saw back then were " Cannon " made here in Australia.
    3 pin XLP and XLR types, plus a few LNEs for AC power.

    FYI XLRs differ by having resilient fittings on the plug to eliminate lateral movement when connected to a mic.

    XLPs could move about somewhat and made clicking noises in the mic.


    ..... Phil

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