• cool power supply

    From John Larkin@21:1/5 to All on Mon Jun 13 16:34:09 2022
    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    --

    If a man will begin with certainties, he shall end with doubts,
    but if he will be content to begin with doubts he shall end in certainties. Francis Bacon

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to bitrex on Mon Jun 13 17:05:42 2022
    On Mon, 13 Jun 2022 19:46:59 -0400, bitrex <user@example.net> wrote:

    On 6/13/2022 7:34 PM, John Larkin wrote:
    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?


    I've owned two Amazon PSUs, one switching one transformer tapping. Both >failed within a year or two, the former I was able to repair but still
    unsure WTF is wrong with the latter.

    I got a good deal on a refurb Agilent E3631A last month, we'll see how
    that goes.

    I like the USB power connector on the front. I have a couple of
    variable-speed USB powered fans that I use when I test power parts,
    and that fits right in. I'd been using my 500 MHz 4-channel Rigol
    scope as a USB power supply.

    I need these to test a +-60 volt half-bridge switching amp, to see how
    the driver and fets work but especially to see if I'll fry the
    inductor.

    --

    If a man will begin with certainties, he shall end with doubts,
    but if he will be content to begin with doubts he shall end in certainties. Francis Bacon

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to John Larkin on Mon Jun 13 19:46:59 2022
    On 6/13/2022 7:34 PM, John Larkin wrote:
    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?


    I've owned two Amazon PSUs, one switching one transformer tapping. Both
    failed within a year or two, the former I was able to repair but still
    unsure WTF is wrong with the latter.

    I got a good deal on a refurb Agilent E3631A last month, we'll see how
    that goes.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From brian@21:1/5 to jlarkin@highland_atwork_technology. on Tue Jun 14 09:07:39 2022
    In message <h3ifah14t8pjpo4nghdthhkc92s0sp7uoq@4ax.com>, John Larkin <jlarkin@highland_atwork_technology.com> writes
    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?


    I'm guessing they save on EMI suppression components for a start.

    It doesn't seem to be available in the EU/UK.

    Brian

    --
    Brian Howie

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to All on Tue Jun 14 07:10:21 2022
    On Tue, 14 Jun 2022 09:07:39 +0100, brian <nospam@b-howie.co.uk>
    wrote:

    In message <h3ifah14t8pjpo4nghdthhkc92s0sp7uoq@4ax.com>, John Larkin ><jlarkin@highland_atwork_technology.com> writes
    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?


    I'm guessing they save on EMI suppression components for a start.

    It doesn't seem to be available in the EU/UK.

    Brian

    Just now I need bulk +-60 volts to test my switching h-bridge
    amplifier. I'll scope it out and see how spikey it is.



    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to jlarkin@highland_atwork_technology. on Tue Jun 14 10:31:39 2022
    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to legg on Tue Jun 14 08:19:47 2022
    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote:

    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin ><jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic >misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage.
    I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big
    and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.





    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to legg on Tue Jun 14 19:46:53 2022
    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote:

    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage.
    I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big
    and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about
    and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    Sometimes I just want to get a task done and if I need to buy something relatively inexpensive to do it that's what I do. I can always find a
    willing recipient if I then don't need it. Worst case electronics
    recycling is a thing.

    I have a few boat anchors but I also don't have the space to fill my
    whole little space with them.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to All on Tue Jun 14 19:16:25 2022
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote:

    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin >><jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic >>misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage.
    I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big
    and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From John Larkin@21:1/5 to bitrex on Tue Jun 14 17:19:01 2022
    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote:

    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage.
    I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big
    and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about
    and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    For $71, if it breaks I'll toss it.

    And essentially nobody provides schematics or service manuals or
    repair parts any more.

    --

    If a man will begin with certainties, he shall end with doubts,
    but if he will be content to begin with doubts he shall end in certainties. Francis Bacon

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to jlarkin@highland_atwork_technology. on Wed Jun 15 09:21:15 2022
    On Tue, 14 Jun 2022 17:19:01 -0700, John Larkin <jlarkin@highland_atwork_technology.com> wrote:

    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote: >>>>
    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014. >>>>>>
    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage. >>>> I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big >>>> and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about
    and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    For $71, if it breaks I'll toss it.

    And essentially nobody provides schematics or service manuals or
    repair parts any more.

    Hell John, do didn't really need this toy in the first place.

    Who cares if it breaks?

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to bitrex on Wed Jun 15 09:20:11 2022
    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote:

    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014.

    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage.
    I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big
    and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about
    and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    Sometimes I just want to get a task done and if I need to buy something >relatively inexpensive to do it that's what I do. I can always find a
    willing recipient if I then don't need it. Worst case electronics
    recycling is a thing.

    I have a few boat anchors but I also don't have the space to fill my
    whole little space with them.

    Deaigner or Tech. That's a good one.

    If a designer doesn't spend SOME time in the trenches, they'll
    not make much of a designer.

    If your tools break these days, you spend most of your time
    waiting for a replacement to show up, learning how to use
    them, from ground zero - with any of the oversights and errors
    that entails (never mind the hairbrained GUI).

    Know your tools, their limitations/foibles - save yourself
    a lot of time. You won't break them as frequently.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to legg on Wed Jun 15 07:15:41 2022
    On Wed, 15 Jun 2022 09:21:15 -0400, legg <legg@nospam.magma.ca> wrote:

    On Tue, 14 Jun 2022 17:19:01 -0700, John Larkin ><jlarkin@highland_atwork_technology.com> wrote:

    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com >>>> wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote: >>>>>
    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014. >>>>>>>
    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage. >>>>> I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders, >>>>> 4 digit resolution, accurate to better than 0.1%. The displays are big >>>>> and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about >>>and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    For $71, if it breaks I'll toss it.

    And essentially nobody provides schematics or service manuals or
    repair parts any more.

    Hell John, do didn't really need this toy in the first place.

    I have a 6-layer proto PCB coming soon. We added a v-score breakaway
    that has a half-bridge switching amplifier that I want to test before
    it goes into a couple of products. I need +-60 volts at 6 amps to test
    it, and this is close enough. $140 for both supplies is great even if
    I use them once.

    But they will be nice additions to the lab.

    https://www.dropbox.com/s/0p6a0f108ukz9aj/Z524_A16.jpg?raw=1

    When the boards are built, I'll snap off the little wing on the right,
    which is my half-bridge test. Other people will get boards to test
    other stuff, like the efinix FPGA and the big mosfet array with the
    CPU cooler.

    We decided to put the four giant mosfets on the parts side of the
    board, thru-hole shiny-side up, and squash them with a cpu cooler fan
    thing.


    Who cares if it breaks?

    RL


    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From jlarkin@highlandsniptechnology.com@21:1/5 to legg on Wed Jun 15 07:30:06 2022
    On Wed, 15 Jun 2022 09:20:11 -0400, legg <legg@nospam.magma.ca> wrote:

    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote: >>>>
    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014. >>>>>>
    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage. >>>> I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders,
    4 digit resolution, accurate to better than 0.1%. The displays are big >>>> and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about
    and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    Sometimes I just want to get a task done and if I need to buy something >>relatively inexpensive to do it that's what I do. I can always find a >>willing recipient if I then don't need it. Worst case electronics
    recycling is a thing.

    I have a few boat anchors but I also don't have the space to fill my
    whole little space with them.

    Deaigner or Tech. That's a good one.

    If a designer doesn't spend SOME time in the trenches, they'll
    not make much of a designer.

    If your tools break these days, you spend most of your time
    waiting for a replacement to show up, learning how to use
    them, from ground zero - with any of the oversights and errors
    that entails (never mind the hairbrained GUI).

    I hate when things like power supplies and function generators have
    bizarre GUIs that make the simple things hard to do. This little
    supply is very intuitive, except that you have to know to push the
    encoder knobs to shift the digit being tweaked.

    The display is fabulous for people with mediocre eyesight.

    I like the knobs, as opposed to push buttons. I can look at a scope or something and twiddle the voltage or current limit smoothly without
    having to look at the supply, or wind up pushing it around on my
    bench.

    Turning knobs is intuitive. My Audi makes me push buttons to do
    anything, which is actually dangerous.

    Our digital delay generator has a spinner knob for that same reason.
    Look at a scope, hang your left hand on the knob, tune a pulse delay
    or width or amplitude.

    http://www.highlandtechnology.com/DSS/P500DS.shtml




    --

    Anybody can count to one.

    - Robert Widlar

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to All on Wed Jun 15 11:22:03 2022
    On Wed, 15 Jun 2022 07:30:06 -0700, jlarkin@highlandsniptechnology.com
    wrote:

    On Wed, 15 Jun 2022 09:20:11 -0400, legg <legg@nospam.magma.ca> wrote:

    On Tue, 14 Jun 2022 19:46:53 -0400, bitrex <user@example.net> wrote:

    On 6/14/2022 7:16 PM, legg wrote:
    On Tue, 14 Jun 2022 08:19:47 -0700, jlarkin@highlandsniptechnology.com >>>> wrote:

    On Tue, 14 Jun 2022 10:31:39 -0400, legg <legg@nospam.magma.ca> wrote: >>>>>
    On Mon, 13 Jun 2022 16:34:09 -0700, John Larkin
    <jlarkin@highland_atwork_technology.com> wrote:

    Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014. >>>>>>>
    Nice display and interface.

    How can they do this for $72?

    Volume, SE Asian material sourcing, subsidised shipping,
    no environmental or safety regulation and slave labour?

    In North America, criticism is mostly sour grapes.
    These units' supply simply taps off a gigantic and
    vibrant local market.

    It's also conceivable that the reliability and design
    integrity of these things is getting better, with
    experience. There's a continuing issue with thermoplastic
    misapplication/substitution and electromechanical switch
    contact ratings. A quick inspection should reveal
    whether mods are required to make it (apparently) lab-safe.

    No doubt the type you've described IS available, but the
    part number you quote is for a 30V model.

    RL


    Amazon makes it hard to reference items without all the Prime baggage. >>>>> I got the 60 volt version for $71, free shipping.

    It's really nice. The voltage and current settings are with encoders, >>>>> 4 digit resolution, accurate to better than 0.1%. The displays are big >>>>> and bright. The enclosure is very nice. Amazing.

    An amateur can set up a very serious electronics lab, with a nice
    parts assortment, for under $500 these days. That, plus a used AoE,
    can get a kid going.

    Hey kids !

    Don't buy anything without a service manual and replaceable
    components.

    RL


    I get the appeal of gear you can know everything there is to know about >>>and keep in top working order yourself for decades, but do you want to
    be an electronics designer or a tech?

    Sometimes I just want to get a task done and if I need to buy something >>>relatively inexpensive to do it that's what I do. I can always find a >>>willing recipient if I then don't need it. Worst case electronics >>>recycling is a thing.

    I have a few boat anchors but I also don't have the space to fill my >>>whole little space with them.

    Deaigner or Tech. That's a good one.

    If a designer doesn't spend SOME time in the trenches, they'll
    not make much of a designer.

    If your tools break these days, you spend most of your time
    waiting for a replacement to show up, learning how to use
    them, from ground zero - with any of the oversights and errors
    that entails (never mind the hairbrained GUI).

    I hate when things like power supplies and function generators have
    bizarre GUIs that make the simple things hard to do. This little
    supply is very intuitive, except that you have to know to push the
    encoder knobs to shift the digit being tweaked.

    The display is fabulous for people with mediocre eyesight.

    I like the knobs, as opposed to push buttons. I can look at a scope or >something and twiddle the voltage or current limit smoothly without
    having to look at the supply, or wind up pushing it around on my
    bench.

    Turning knobs is intuitive. My Audi makes me push buttons to do
    anything, which is actually dangerous.

    Our digital delay generator has a spinner knob for that same reason.
    Look at a scope, hang your left hand on the knob, tune a pulse delay
    or width or amplitude.

    http://www.highlandtechnology.com/DSS/P500DS.shtml

    Sing its praise in 6 months time.

    Line switches, line power sockets, output sockets,
    fuse holders, knobs, displays, solder joints, coil
    formers are all suspect.

    Does the precise output change when somebody farts
    in the next room? What's the output at start-up?
    USB or bluetooth? Getting more complicated, fast.

    Mind you, it's probably already unobtanium or
    sold with a different brand name /price, by a
    different seller, today. One solution is to buy
    double quantities and pray that the same thing
    doesn't break in all of them - shelves of parts
    mules. This sort of defeats the price advantage.

    There ARE longer-term brands and suppliers that
    have been in business long enough to at least cover
    their warranty period. (TopPower? perhaps somebody
    has other suggestions)

    Hope your spinner knob is optical. The more spinning
    it does, the more wear it will see. They're the first
    things to go on off-shore fabs here, without any user
    involvment.

    RL

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