18 Sep
2018
18 Sep
'18
1:11 a.m.
? ? > From: Henk Gooijen
?? > As far as I know, the 11/40 uses only one H745.
Depends on what kind of memory it has. If MF11-L, it has two H745's; if
MM11-U, it has an H745 and an H754.
(The harness has two different connectors for the 5th 'brick', so it can
handle either kind. At least, that's the situation on the later machines
[serial numbers above 6000]; early production /40's only support the MF11-L,
and you have to use special add-on harnesses to support an MF11-U in them;
see DEC-11-H40SA-B-D, Chapter 6 for the details.)
As I don't have core memory modules available, I thought of using MS11 memory,
which, according to my research, seems to be an option for 11/40 systems.
The system manual states on page 6-7 that the base power configuration consists
of two H745 regulators and that one may be swapped with a H754 in case MF11-U
memory is used.
Does that mean that a single H745 regulator might be sufficient for my needs?
All the best,
Pierre