PDP-11/10 repair started

Henk Gooijen henk.gooijen at hotmail.com
Mon Oct 5 15:02:16 CDT 2015

-----Oorspronkelijk bericht----- 
From: william degnan 
Sent: Monday, October 05, 2015 8:59 PM 
To: General Discussion: On-Topic and Off-Topic Posts 
Subject: Re: PDP-11/10 repair started 

What are the DC LO and AC LO values off the backplane?  Do they change when
you insert the CPU card.  (one at a time).

I measured AC LO and DC LO with a scope while both CPU boards are in
the backplane. Both measured 4.6 V, there was a ripple of 130 mV
(looked like a sawtooth signal). I did not see spikes.

- Henk

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