USO (Unidentified System Unit)

Rod Smallwood rodsmallwood52 at
Mon Jan 11 11:46:30 CST 2016

On 11/01/2016 17:33, Henk Gooijen wrote:
> I am pretty sure it is DEC made. Another manufacturer would surely  > have sticked labeling from themselves on it ;-) Viewed from the rear 
 > side (looking at the module handles), the right side panel has no id 
 > labeling. The left side panel might have one, but that side is > 
completely covered by a H??? power supply (forgot to write down the H > 
number). I will check next Saturday. > > Thanks, - Henk > > > 
-----Oorspronkelijk bericht----- From: Jay Jaeger Sent: Monday, > 
January 11, 2016 6:25 PM To: cctalk at Subject: Re: USO > 
(Unidentified System Unit) > > If it is DEC, and they haven't fallen 
off, then on the side panels > on one side or the other of the rows 
connectors there may be some > identification? > > JRJ > > On 1/10/2016 
11:31 AM, Noel Chiappa wrote: >>> From: Henk Gooijen >> >>> I could not 
find the M5950 nor M3020 in any module list. >> >> The M3020 (and M1131) 
are variants of the M302 (and M113, >> respectively), so I don't think 
those are much of a clue. The M5950 >> I couldn't find anything about at 
all, but the M595 is a current >> mode converter for the DF11 - which I 
can't find much about, >> although it's in the '73-'74 Peripheral 
Handbook - but that looks >> distinctly like a possibility, from the 
pictures there. >> >> Noel >>

DEC had a product line called  Components Group. You could buy almost 
any DEC part and build what ever you wanted with it.

There was also CSS or Computer Special Systems. They did bespoke systems 
and of course used standard parts where they could.


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