11/34a power supply/regulator question

dundas at caltech.edu dundas at caltech.edu
Sat Sep 16 18:43:00 CDT 2006


The recent discussion of Julian's PDP-11/34 inspired me to look at an
abandoned one that I adopted some while ago.  The particular computer in
question is a /34A-DE.

After looking at the prints and checking a few voltages, I find I have
no +5.  Reviewing the recent thread and looking closer at the prints, it
seems that I am missing two H7441s.  (It does have a H754 and H745, with
the 54-10864-YA [Rev. L] distribution board.)  Is that correct?  It
needs (one or) two H744 or H7441 (in my case) in order to operate?

Thanks,

John




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