Re: Replacement GS PSU Internals

[Drew <goggledrew@gmail.com>]

On 15 Sep, 15:06, Drew <goggled...@gmail.com> wrote:
> On 15 Sep, 14:09, Polymorph <polymorp...@hotmail.com> wrote:
>
>
>
> > On Sep 15, 5:33 pm, Drew <goggled...@gmail.com> wrote:
>
> > > On 15 Sep, 08:06, Polymorph <polymorp...@hotmail.com> wrote:
>
> > > > On Sep 15, 4:18 pm, Drew <goggled...@gmail.com> wrote:
>
> > > > > 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
>
> > > > Drew,
>
> > > > Funnily enough, searching for "MeanWell PT-65B" in Google turns up the
> > > > MeanWell website (1st hit) which happens to be in the UK, so I'm
> > > > guessing you'll have no troubles at all...  ;-)
>
> > > > Cheers,
> > > > Mike
>
> > > yea have already requested a quote :), lets hope they come back with a
> > > sensible price
>
> > > Drew
>
> > Drew,
>
> > One thing I just noticed (I was curious myself) is that Meanwell also
> > produce quad output supplies too - i.e. no need to do the regulator
> > mod for -5V. I haven't checked the dimensions are compatible with the
> > IIgs power supply case though (the quad output supply has different
> > dimensions to the triple output supply). First impression is it looks
> > small enough, but as I said I haven't measured it up.

Looks like the Q60 is to big for the GS power supply. It measures 97mm
wide were the GS PSU is about 85mm.

Drew