• Risc PC PSU

    From Rob Heaton@21:1/5 to All on Sat Aug 29 09:03:18 2020
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    --
    Rob Heaton

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dave Plowman (News)@21:1/5 to Rob Heaton on Sat Aug 29 11:05:50 2020
    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    I found a PC PS from CPC that would fit inside the Acorn PS case with a
    bit of work. Lots more power, and a quieter fan.

    It involved removing the loom from the old PS and fitting to the new. Not actually that difficult if you can solder. Cost about 30 (several years
    ago) and a morning's work.

    --
    *I didn't like my beard at first. Then it grew on me.*

    Dave Plowman dave@davenoise.co.uk London SW
    To e-mail, change noise into sound.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Stuart@21:1/5 to Rob Heaton on Sat Aug 29 13:12:32 2020
    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    The most obvious question here, first of all, is why do you think you need
    an upgrade?

    What is the rating of your current PSU?

    --
    Stuart Winsor

    Tools With A Mission
    sending tools across the world
    http://www.twam.co.uk/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chris Hughes@21:1/5 to Rob Heaton on Sat Aug 29 12:41:34 2020
    In message <860386a758.rob@rob.robheaton.co.uk>
    Rob Heaton <rob@robheaton.co.uk> wrote:

    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    You could try CJE Micros

    http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=ACO-103WSORR

    Might be suitable. Check with them direct.

    --
    Chris Hughes

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rob Heaton@21:1/5 to Stuart on Sat Aug 29 14:48:14 2020
    On Sat, 29 Aug 2020 13:12:32 +0100, Stuart wrote:

    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    The most obvious question here, first of all, is why do you think you
    need an upgrade?

    What is the rating of your current PSU?

    I currently have the 70w version, I have found that when adding anything
    more than a hard drive and a cd drive, the machine fails to start, I just
    get a black screen.

    I can remove either the cd drive or hard drive power, then add another
    device, the machine then works correctly.

    I'm assuming too much current is being drawn for the PSU to cope with.


    Rob.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rob Heaton@21:1/5 to Chris Hughes on Sat Aug 29 14:51:05 2020
    On Sat, 29 Aug 2020 12:41:34 +0100, Chris Hughes wrote:

    In message <860386a758.rob@rob.robheaton.co.uk>
    Rob Heaton <rob@robheaton.co.uk> wrote:

    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    You could try CJE Micros

    http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?
    prodcode=ACO-103WSORR

    Might be suitable. Check with them direct.

    I spoke to Chris @ CJE earlier this year, I was hoping for a PSU with new capacitors as they are getting on now!
    CJE don't currently offer these, but are hoping to offer something at a
    later date.

    I've been talking to some people on the StarDot forums as some members
    have put together a refurb kit for certain PSU models.


    Rob.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rob Heaton@21:1/5 to All on Sat Aug 29 14:51:56 2020
    On Sat, 29 Aug 2020 11:05:50 +0100, Dave Plowman (News) wrote:

    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    I found a PC PS from CPC that would fit inside the Acorn PS case with a
    bit of work. Lots more power, and a quieter fan.

    It involved removing the loom from the old PS and fitting to the new.
    Not actually that difficult if you can solder. Cost about £30 (several
    years ago) and a morning's work.

    That sounds ideal!
    I don't suppose you have a model or part number of the PSU tht was used?


    Rob.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Stuart@21:1/5 to Rob Heaton on Sat Aug 29 16:43:44 2020
    In article <ridpre$1s62$1@gioia.aioe.org>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    I currently have the 70w version, I have found that when adding anything
    more than a hard drive and a cd drive, the machine fails to start, I
    just get a black screen.

    103W power supplies were available.

    I moved my RPC into a standard ATX case complete with PSU. All that is
    required is a little metal bashing and a plug to match the Acorn PSU
    socket on the motherboard. You could cut this off your old PSU or get one
    from CJE.

    Then it's a case of how many HDDs or CDDs do you want as most ATX cases
    have mounting slots aplenty.

    http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=VAR-RPCPSUP

    --
    Stuart Winsor

    Tools With A Mission
    sending tools across the world
    http://www.twam.co.uk/

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Theo@21:1/5 to dave@davenoise.co.uk on Sat Aug 29 22:18:20 2020
    "Dave Plowman (News)" <dave@davenoise.co.uk> wrote:
    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    I found a PC PS from CPC that would fit inside the Acorn PS case with a
    bit of work. Lots more power, and a quieter fan.

    It involved removing the loom from the old PS and fitting to the new. Not actually that difficult if you can solder. Cost about £30 (several years ago) and a morning's work.

    A FlexATX PSU fits mechanically and should work electrically. The main
    issues are joining the wiring loom, fixing the PSU down (it's much smaller
    than a RPC PSU), and putting in a switch to drive the RPC's power button.
    As you say, keeping the case of the RPC PSU and putting a new PSU inside
    avoids some of these problems.

    If it were me, I'd get a 24 way ATX power extension cable: https://www.ebay.co.uk/itm/ATX-Extension-Cable-Lead-24-Pin-Male-to-24-Pin-Female-Internal-PC-PSU-Power-27cm/293099711936
    Cut it in half, and join the 'upstream' end to the RPC PSU's power
    loom. Then any ATX power supply will plug in to drive the RPC.
    In particular a PicoPSU:
    https://www.mini-box.com/s.nl/it.A/id.417/.f
    can be driven from a 12V power brick.
    You'd additionally need to hook in a switch to turn it on and off.

    Theo

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dave Plowman (News)@21:1/5 to Rob Heaton on Sun Aug 30 11:04:13 2020
    In article <ridq2c$1s62$3@gioia.aioe.org>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    On Sat, 29 Aug 2020 11:05:50 +0100, Dave Plowman (News) wrote:

    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    I found a PC PS from CPC that would fit inside the Acorn PS case with a
    bit of work. Lots more power, and a quieter fan.

    It involved removing the loom from the old PS and fitting to the new.
    Not actually that difficult if you can solder. Cost about 30 (several years ago) and a morning's work.

    That sounds ideal!
    I don't suppose you have a model or part number of the PSU tht was used?


    IIRC, it was the only one they sold in the RPC shape - ie rectangular
    rather than the usual square standard ATX type. Any modern PS will be
    plenty large enough for an RPC.

    I'd look on Ebay these days first.

    --
    *I wish the buck stopped here. I could use a few.

    Dave Plowman dave@davenoise.co.uk London SW
    To e-mail, change noise into sound.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From druck@21:1/5 to All on Sun Aug 30 11:17:56 2020
    On 30/08/2020 11:04, Dave Plowman (News) wrote:
    IIRC, it was the only one they sold in the RPC shape - ie rectangular
    rather than the usual square standard ATX type. Any modern PS will be
    plenty large enough for an RPC.

    Maybe too large though. There have been cases of PC power supplies not
    working if not enough power is requested on 5V.

    ---druck

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Dave Plowman (News)@21:1/5 to druck on Sun Aug 30 12:28:32 2020
    In article <rifucl$4t6$1@dont-email.me>,
    druck <news@druck.org.uk> wrote:
    On 30/08/2020 11:04, Dave Plowman (News) wrote:
    IIRC, it was the only one they sold in the RPC shape - ie rectangular rather than the usual square standard ATX type. Any modern PS will be plenty large enough for an RPC.

    Maybe too large though. There have been cases of PC power supplies not working if not enough power is requested on 5V.

    Could be. No problem with the one I have. Sadly it's so long ago I don't
    have details. Not even sure which RPC it's in. ;-)

    --
    *When the going gets tough, the tough take a coffee break *

    Dave Plowman dave@davenoise.co.uk London SW
    To e-mail, change noise into sound.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rob Heaton@21:1/5 to Theo on Sun Aug 30 12:49:06 2020
    In message <KpF*hgR0x@news.chiark.greenend.org.uk>
    Theo <theom+news@chiark.greenend.org.uk> wrote:

    "Dave Plowman (News)" <dave@davenoise.co.uk> wrote:
    In article <860386a758.rob@rob.robheaton.co.uk>,
    Rob Heaton <rob@robheaton.co.uk> wrote:
    Does anyone have any information on upgrading the Risc PC PSU?

    I remember that APDL used to offer upgraded high output PSU's in the
    original casing.

    Has anyone upgraded theirs or have any pointers on where to start?

    I found a PC PS from CPC that would fit inside the Acorn PS case with a
    bit of work. Lots more power, and a quieter fan.

    It involved removing the loom from the old PS and fitting to the new. Not
    actually that difficult if you can solder. Cost about 30 (several years
    ago) and a morning's work.

    A FlexATX PSU fits mechanically and should work electrically. The main issues are joining the wiring loom, fixing the PSU down (it's much smaller than a RPC PSU), and putting in a switch to drive the RPC's power button.
    As you say, keeping the case of the RPC PSU and putting a new PSU inside avoids some of these problems.

    If it were me, I'd get a 24 way ATX power extension cable: https://www.ebay.co.uk/itm/ATX-Extension-Cable-Lead-24-Pin-Male-to-24-Pin- Female-Internal-PC-PSU-Power-27cm/293099711936
    Cut it in half, and join the 'upstream' end to the RPC PSU's power
    loom. Then any ATX power supply will plug in to drive the RPC.
    In particular a PicoPSU:
    https://www.mini-box.com/s.nl/it.A/id.417/.f
    can be driven from a 12V power brick.
    You'd additionally need to hook in a switch to turn it on and off.

    I'm going to order one of those PicoPSU adapters, suitable 12v power brick
    and the 24 way ATX extension.

    I should be possible to enclose everything in the original PSU casing and maintain the power sockets along with the power switch.

    --
    Rob Heaton

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Theo@21:1/5 to Rob Heaton on Sun Aug 30 18:41:09 2020
    Rob Heaton <rob@robheaton.co.uk> wrote:
    I'm going to order one of those PicoPSU adapters, suitable 12v power brick and the 24 way ATX extension.

    Something else I'm reminded of is to check what you have for sockets for drives. A lot of Risc PC gear is likely to need HDD-style Molex connectors, while nowadays drives tend to have SATA power connectors. You might need to string some adaptors to get enough sockets.

    Also do the sums on current, as I'm not sure what the current output of the various PicoPSUs do (PCs probably take more on 3.3V which the RPC won't
    touch).

    Theo

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Rob Heaton@21:1/5 to Theo on Wed Sep 9 14:47:12 2020
    Theo <theom+news@chiark.greenend.org.uk> wrote:
    Rob Heaton <rob@robheaton.co.uk> wrote:
    I'm going to order one of those PicoPSU adapters, suitable 12v power brick >> and the 24 way ATX extension.

    Something else I'm reminded of is to check what you have for sockets for drives. A lot of Risc PC gear is likely to need HDD-style Molex connectors, while nowadays drives tend to have SATA power connectors. You might need to string some adaptors to get enough sockets.

    Also do the sums on current, as I'm not sure what the current output of the various PicoPSUs do (PCs probably take more on 3.3V which the RPC won't touch).

    Just wanted to say thank you to everyone who replied, especially Theo who suggested the Pico PSU.

    The PicoPSU arrived today and I’ve successfully powered the Risc PC from
    it!
    My next job is to fit it into the chassis of the original PSU and
    maintain the original power in connector and power switch.


    Cheers,
    Rob.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)