Apple IIgs power leads (was: Re: 911 Fatal Error on TransWarp GS?)

[mjmahon@aol.com (Michael J. Mahon)]

I wrote, yesterday:

>Rubywand replied:
>
>>"Michael J. Mahon" writes ...
>>> 
>> ....
>>
>>> 
>>> What was the significant voltage drop?  How was it measured?  Did it
>>> include the connector?  Did it include any main board traces?  How
>>> much voltage drop was induced by inserting the current meter?
>>> 
>>> Have you looked at the +5 with a scope?  If the noise is present at
>>> the power supply terminals, then fatter leads won't help.  If power is
>>> clean at the power supply terminals and dirty at the main board
>>> connector, then, and only then, bigger leads could help.  (Again,
>>> proper gounding of the scope is essential.)
>>> 
>>
>>     It's been a while since doing the measurements; so, I don't recall the
>>details. The check was done outside of the IIgs into a purely resistive
>load.
>>Removing the current meter would have been my usual practice for doing final
>>voltage drop checks on low R leads. Pretty sure the drop at 3 Amps was
>around
>>.3V or so. Don't recall putting the scope on power check points in the IIgs.
>
>
>This would correspond to a resistance of 0.1 ohm--which is 14 times the
>resistance of a foot of #18 wire.  That is not attributable to the wire unless
>it is _seriously_ broken, or has one or more defective connections.

<snip>

I was giving this some more thought today, and I think I may know
where things ran off the tracks.