Re: IIgs locking up after 15-20mins, TWGS likely overheating.

["Apple2Steward" <none@none.net>]

"ict@ccess" <gids.rs@sasktel.net> wrote in message 
d68bf238-8a0c-4051-afc3-c9dfd2948f5f@l6g2000yqb.googlegroups.com">news:d68bf238-8a0c-4051-afc3-c9dfd2948f5f@l6g2000yqb.googlegroups.com...
> Michael J. Mahon wrote:
>> On 8/29/2010 4:50 AM, wyeo wrote:
>> > Too much draw from the power supply, if you have an original 
>> > power
>> > supply, it is insufficient and the PS overheats and heats up 
>> > the rest
>> > of the system.
>> >
>> > I had the same issue when I have just TWGS, RF SCSI and a 
>> > sound card,
>> > it will start locking up.
>> >
>> > Either you get a heavy duty power supply (likes of Pegasus,
>> > InnerDrive, Vulcan), or the Buggie Power for a replacement.
>> >
>> > But recently, I came across an article on changing the size 
>> > of the
>> > cable inside the original power supply, to push out more 
>> > juice ... and
>> > jumping the power cables directly to the slots (for the 
>> > serious
>> > hardware hacker).
>>
>> That's just voodoo.  You need a power supply with a bigger
>> capacity, and increasing the size of the wires won't do it.
>> (It also makes your system look like Frankenstein.  ;-)
>>
>> I suspect this superstition got started because a few folks 
>> with
>> just marginal power problems tried it and it gave them an 
>> additional
>> few millivolts, making their systems slightly less marginal. 
>> ;-)
>>
>> Don't bother.  Get a supply with more capacity--specifically, 
>> more
>> +5v capacity.
>>
>> -michael
>>
>> NadaNet 3.1 for Apple II parallel computing!
>> Home page:  http://home.comcast.net/~mjmahon/
>>
>> "The wastebasket is our most important design
>> tool--and it's seriously underused."
>
>
> Sorry Michael!  I am jinxing your voodoo and raising you a 
> fact.
>
> I, myself, have replaced one of the ground wires and the +5 V 
> wires
> with #12 gage wires inside the power supply.  Since I have done 
> that,
> my IIGS is much more stable with a 12 Mhz Zip GS in slot 3 and 
> a 8 MB
> serius RAM card.  I usually crashed 10-12 times a day.  Most of 
> the
> crashes were isolated to the serius RAM card.  Since the 
> upgrade, I
> barely even crash once per day.  I believe I can alleviate that 
> one
> crash as well by soldering a ground wire from the ground pin to 
> a slot
> 5 ground.  I have a CFFA card in slot 5 and a PC transporter in 
> slot
> 7, so slot 5, 6 and 7 cards would benefit from that extra 
> grounding as
> well as auxiliary RAM.
>
> I haven't soldered a wire to slot 5 ground yet though because, 
> just
> call me plain lazy, but one crash a day is acceptable to me. 
> :)
>
> Even 1 mVolt goes a long way to make the IIGS more stable and 
> the
> power supply strong enough for most purposes.  I have even 
> installed a
> Version 01 motherboard into a PC tower and adapted a 200 watt 
> power
> supply to work with the IIGS motherboard with no better 
> results.  I
> still crash about once per day.
>
> my 2 cents worth (solder and #12 gage wire extra)
>
> Rob
>

Michael gave an extended explanation of the fallacy of addressing 
power supply instability with heavier leads in a previous 
posting.  It is worthwhile reading:

http://groups.google.com/group/comp.sys.apple2/msg/1ccfc51482a99346?hl=en