Re: Replacement GS PSU Internals

[Drew <goggledrew@gmail.com>]

On 14 Sep, 23:20, Steven Hirsch <snhir...@gmail.com> wrote:
> A2Aviator wrote:
> > Get any open frame switching power supply that is 40W or greater, (40
> > being close to the OEM one) that fits within the dimensions of the
> > box.
>
> > There was a thread on here about a replacement Vulcan power supply
> > module, that will work.  It's a fairly common off the shelf part.
>
> > You need +5, +12, -5 and -12 DC.
>
> > The one in the InnerDrive had no -5, they "floated" (literally) a
> > regulator in midair inside the box and attached it to the -12 line.
>
> Yup, that would have been me.  The MeanWell (great name) PT-65B is what I used
> to restore a Vulcan GS.  It should fit the stock IIGS power supply case
> without incident.
>
> Available from Jameco Electronics for $29.95 + shipping.
>
> You will have to rig up a -5V regulator, but hopefully in a bit more robust
> manner than what Tony describes for the InnerDrive (that's sort of scary).  I
> used a 7905T regulator - also available from Jameco for a couple of bucks.
> That drops the -12V rail to -5V and provides the fourth voltage.
>
> The MeanWell is rated at 65W (72 with forced air cooling), which should be
> more than enough for even the most fully-loaded IIGS!
>
> Steve
>
> p.s. - While it does nominally fit the Vulcan case, you end up having to
> unsolder a few components at the AC input end and reorient them (some on their
> side, one choke airborne) using some bus wire and skill.  Very, very tight.
> This should not be a problem with the GS supply since it has more room.

Thanks everyone. I am in the UK, so will need to hunt down a supplier
here, which i doubt will be a problem.
Drew