Weird Lear-Siegler ADM-3A board

Adam Sampson ats at
Fri May 25 16:04:28 CDT 2018

Adrian Graham via cctalk <cctalk at> writes:

> A friend of mine has said ADM-3A and is baffled by the tiny board it
> contains, not the usual ‘covering entire base’ discrete logic board
> they normally have.

Here's a similar one that was on eBay a couple of years ago (the full
listing has pictures of the insides):

The September 1986 date on the case of yours means that it dates from
around the time when Lear-Siegler sold their terminal business to
Zentec -- is it actually badged Lear-Siegler?

Adam Sampson <ats at>                         <>

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