19 Jun
2014
19 Jun
'14
8:34 a.m.
On 06/19/2014 02:47 AM, cctalk-request at classiccmp.org wrote:
Hi Sean,
No three-phase available nearby so if I ever do need it I'll be using a rotary
converter or VFD or something.
Luckily I don't need it at the moment.
It will likely have it's own transformer and drop.
I'm sure it will be at least 200A service.
There are only a VERY few devices
that can be connected to a
PDP-11
that need 3-phase power. One I know of is the RP07, but that is
really a VAX peripheral. Since it is Massbus, it COULD be
connected to
an 11/70, though. Possibly also the RP06 might also be 3-phase.
In general, though, these machines are QUITE low power
compared to
higher-end machines like PDP-10's and early VAXes. I can't
imagine
any PDP-8 system that needs much power. Unless it was loaded
with a BUNCH of RK05 drives, I can't imagine it wouldn't run off
a single 120V 15A outlet.
The PDP-11/45 draws enough power it would need separate outlets
for the CPU and the drives.
Jon