Help with getting an original Altai running: 8080A clock circuitry and MITS88 2-SIO board

Eric Smith spacewar at
Sun Feb 7 16:43:24 CST 2016

On Sun, Feb 7, 2016 at 3:23 PM, Kip Koon <computerdoc at> wrote:
> I also have an original Altair 8800 that has not been powered up since I was
> in my late teens or early twenties.  I'm 56 now and I was wondering if
> anyone has put together a document for successfully restoring Altair
> computers specifically and retro style computers in general.

IMPORTANT: Do NOT power up until you've tested the DC power supplies
*without* the boards installed. Check DC voltages and ripple. Aluminum
electrolytic filter capacitors may need to be reformed or replaced.
(But let's not restart the argument about which to do!)

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