25 Apr
2011
25 Apr
'11
3:17 a.m.
4) Assemble the PSU section only, and if necessary
connect it to dummy
load
resistors. Power up and check the output voltages.
Don't go any further
until
they're cortrect
This is the bit I always wonder about. I have recently acquired a PDP-11/24
and I want to try to power it up the "right" way. Is it sufficient to load
just one of the output pins from the PSU to avoid damaging the PSU, or do
you need to load one of each of the different voltages? In my case the PSU
is a H7140 which has two backplane connectors with +5V, +15V, +12/15 B (not
sure what that means), -15V and -12/15 B.
What kind of resistors would you use? I have a 10K resistor I bought for the
purpose of discharging capacitors (following an earlier discussion on this
list), would that do? Would an admittedly riskier alternative be to connect
just the fans, would they provide enough load?
Regards
Rob