"Ian Iveson" wrote in message
. ..

I used 9-way screw-lock connectors with leading centre ground for each of
my monoblocs, after searching for weeks through catalogues detailing a
zillion military/industrial style jobbies. The big problem was finding
ones that don't need expensive dedicated crimping tools. I probably have
the part numbers somewhere, but nine pins isn't what you want anyway, and
they are expensive. But very nice solid plated brass.

That's probaly the round plated connector I mentioned to Andy elsewhere in
this thread. the terminal pins have solder buckets, it needs no crimping
tool. The fixing holes are 2.5mm. I usually drill them out to 3mm.
For such a high quality connector, I don't think Euro 17 is expensive.

I was worried more about current than voltage, so I connected power valve
filaments in series and drive them with a current source.

My amp needed 10A DC for heaters, elevated 100V above ground.
I split this over two pairs of pins.

I spent some time wondering about high unregulated current passing through
the same conduit as the carefully-filtered HT and bias supplies.

Same here. Once I had the interconnect cable I was planning to use,
I wired the B+ and Bias to inner wires, and kept the heater wires on the
outside. The flexible armoured cable had both an inner ground wire
and also an outer braided shield. With DC heaters in a 50W PP amp,
I managed a noise floor of 150µV ( SNR about 105dB)

Iain