Dec PDP-8 Lamps

From: Ethan Dicks <>
Date: Wed Jan 30 19:42:20 2002

--- Pete Turnbull <> wrote:
> My PDP-8/E uses 12V or 14V bulbs, running off an 8V (nominal) supply.

Yes... different bulbs, different circuits.

> Other models may very well be different, though.

The PDP-8/E uses TTL logic. The R-series stuff does not. The
supply rails are +10VDC and -15VDC... not the same.

The pre-TTL stuff apparently uses 28VDC bulbs with a wire base,
running off a nominal 12VDC. They obviously learned something
from their early products.


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Received on Wed Jan 30 2002 - 19:42:20 GMT

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