Re: IIGS INTERNAL P.S.: Transplant IIe ps innards

[buggie@ben15.unm.edu (stephen e buggie)]

I agree with Jeff Blakeney's essay.  Remember, the "stealth-IIgs" (IIgs
motherboard in IIe casing) uses a standard IIe power supply.  The
Bugg-transplant merely moves the IIe unit into the longer-length IIgs p.s.
casing so that it can mount into the square IIgs CPU casing.

The issue of power overload depends on the number and type of peripherals
you attach to the IIgs.  The Bugg-transplant will work if your "portable
GS" has moderate to low load ---- this is likely to apply to a "portable"
IIgs that you move frequently.   For your "flagship IIgs," loaded with
extras and rooted to one location, the truly heavy duty power supply
(bugg-power or your copy of one) is preferred.

I'll do a series of tests with the Bugg-transplant to see how it performs
with 2-3 interface cards.....

Steve Buggie              buggie@unm.edu




Jeff Blakeney (CUTjefbla@bconnex.net) wrote:
: On Sat, 05 Sep 1998 16:04:17 GMT, dcross1@nospam.home.com (David
: Cross) wrote:

: >In article <6srjcs$8au$1@lynx.unm.edu>, buggie@ben15.unm.edu says...
: >>
: >>          RESURRECTING A DEAD IIGS INTERNAL POWER SUPPLY WITH THE 
: >>                MECHANISM OF A IIE INTERNAL POWER SUPPLY
: >>          =======================================================
: >
: >You realize that Applied Engineering used to SELL "heavy-duty" power supplies 
: >for Apple //e owners who converted the innards of their //e to a //gs?
: >
: >Your back-conversion method is dangerous for a //gs owner who's near the 
: >35-watt rated capacity of a //e power supply, but safely within the 65-watt 
: >rating of a //gs supply.
: >
: >If I were you, instead of trumpeting this unsafe measure I'd be buying out 
: >Applied Engineering's old stock of //gs supplies and reselling them.
: >

: Just to throw a little support for Stephen's new service, I used an
: Apple //e power supply with my IIgs for years.  I upgraded my //e to a
: IIgs and all that was replaced was the motherboard, bottom and back
: plates of the case.  I was still using the original power supply.

: After buying a IIgs case from a local dealer, I move my IIgs
: motherboard into it with the intention of buying a heavy duty IIgs
: internal power supply for it at some point.  I never did buy one.

: I continued to use a //e power supply (I think this was an extra one
: and not the one from my //e to IIgs upgrade) as an external power
: supply for my IIgs up until this year when I took a surplus IBM power
: supply I had from an old IBM XT case (150 Watt power supply) and made
: a conversion cable for it to use it with my IIgs.

: Admittedly, I don't have a lot of cards in my IIgs at present.  Just a
: 5.25" floppy controller (so I can enable and disable 5.25" disks
: whenever I want), a CMS SCSI card and a CV-Tech 4 MB RAM card with an
: Apple 1 MB card in its piggy back slot.

: For those who aren't pushing their IIgs' to the limit, a //e power
: supply should be fine for a while.

: I don't see it as being "unsafe" as you said.  There is little to no
: chance of damaging anything, other than the power supply if, you try
: to draw too much current from it.  Most likely the power supply will
: just shut down and you won't be able to power up your IIgs.

: === To ensure I see a reply please also e-mail me but remember to:
:     CUT the obvious from my e-mail address to e-mail me
:     Jeff Blakeney - Dean of the Apple II University on Delphi