14 Dec
2015
14 Dec
'15
10:33 a.m.
2015-12-14 17:12 GMT+01:00 william degnan <billdegnan at gmail.com>:
Just to change the subject..
There were "S" and an "NC" version of 11/05 high profile system.
Why?
I am curious if any DEC historians here know the reason for two versions of
the same DEC PDP 11/05 *high profile* computer (not talking about the low
profile). There are separate manuals for each type.
Age? The NC (and ND if you are in 230VAC area) are in the BA11-D chassis
which uses the H750 PSU. The same chassis was used by for example 11/35.
The H750 PSU has partly the same assemblies as the low PDP-11/05 chassis
and then also a H744. The memory system is somewhat different in that the
H214 is 8kW and the H217 is 16kW and the former is used in the NC/ND while
the S uses the latter.
But of course there can be all sorts of other reasons as well.
/Mattis
The S seems to be more OEM-ish because it comes in an
BA11-K chassis. I am
guessing you'd see an 11/05 S as part of a larger system (PDP 10), whereas
the NC model would be for a stand alone system. ???
This S's BA11-K chassis was used by other hardware by simply changing the
backplane. The "NC" model chassis seems to be specifically for the 11/05 I
don't think it appears anywhere else.
If anyone is interested to see the different models I have a thread on my
site for each type:
11/05 S
http://vintagecomputer.net/browse_thread.cfm?id=622
11/05 NC
http://vintagecomputer.net/browse_thread.cfm?id=249
... and then there are the 11/10's....
--
Bill