Unusual Altair 8800 power supply. Upgrade kit, factory error, or something else?

Tom Moss tomjmoss at googlemail.com
Wed Nov 11 15:56:26 CST 2015

Well mine's an aftermarket one from "Jade Computers", as far as I'm aware
MITS only used the plastic guides.

Aren't the guides in the 8800 and 8800b mounted the same distance from the

On 11 November 2015 at 20:52, Chuck Guzis <cclist at sydex.com> wrote:

> On 11/11/2015 12:05 PM, Joseph Lang wrote:
>> Rev 0 used a small (too small;-) transformer and suffered. The later
>> PS used a larger transformer, but the layout had to be swapped to
>> clear the card cage.
> Yes, the transformer was too small.  But "card cage"?  All I've got is a
> bunch of blue plastic card guides screwed to the (4 slot) backplane PCB.
> When did the metal card cage come into being?
> --Chuck

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