Re: AE Internal heavy duty power supplies: Questions

[rubywand@aol.com (RUBYWAND)]

In article <4p7io7$aq1@lynx.unm.edu>, buggie@pegasus.unm.edu (stephen e
buggie) writes:

>
>The buyer of the generic internal IIgs power supply is skeptical that it 
>really is "heavy duty."  To resolve this disagreement could someone send 
>me e-mail stating:
>
>1) Amperage ratings of the Applied Engineering IIgs internal heavy-duty 
>   power supply, and also
>
>2) Amperage ratings of the standard IIgs internal power supply, by Apple.
>
>

     The generic IIgs power supply is, mostly, "heavy duty" vis-a-vis the
standard II+/IIe power supply:

       IIgs           II+/IIe

+5   4.00A  vs.  2.50A
 -5   0.25A  vs.  0.25A
-12  0.25A  vs.  0.25A
+12 1.00A  vs.  1.50A

     Evidently, the purchaser of the generic IIgs PS is dissatisfied
because the IIgs supply did not solve his/her problem. The problem is not
the IIgs PS's "capacity". Our ROM-01 GS includes a 10MHz Zip-GS, RAMFast,
Focus HD, ... and it runs fine on the standard IIgs supply.

     It's a good bet the explanation is that the user is pulling a fairly
heavy load which produces a significant voltage drop across the skimpy
IIgs supply's leads. This results in lowered at-motherboard voltage and
increased system noise. The main trick is to replace the +5, +12, and GND
leads with nice fat wires-- like #14-#12 gauge.
  
     Of course, if we add another power sucking board-- like a Second
Sight video card-- then it will be time to consider getting a genuine
Buggie 150W PS.
 

Rubywand