Re: Replacement GS PSU Internals

[Polymorph <polymorph69@hotmail.com>]

On Sep 15, 5:33 pm, Drew <goggled...@gmail.com> wrote:
> On 15 Sep, 08:06, Polymorph <polymorp...@hotmail.com> wrote:
>
>
>
>
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> > 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.

Look for "Meanwell Q-60". One such example can be found here:
http://www.computronics.com.au/meanwell/q-60/

I might look into getting one of these as they're quite an inexpensive
way of replacing the IIgs power supply.  :-)

Hope this helps!

Cheers,
Mike