WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
I guess the Health and Safety boys of today would not like it even though the Octal plug was used for many such applications in the past. Just make sure you fit the socket on the power supply and arrange for the amplifier not to have any charged capacitors lurking on the detached plug. I try to use connectors that have a certain amount of shrouding on both halves, even recessed pins are better than fully exposed ones, especially if exposed pins can be touched whilst actually making contact with the socket.
I'd be happier with the Bulgin rather than the octal.
I also make sure the psu "knows" the HT connector is terminated before energising the HT. In my case, continuity between the sheild of the BNC and the chassis. This then operates a relay to switch the ht on after a short delay to let the cathodes warm.
250V ac means a peak of 350V, so not far short of your 500V. I would certainly be happy to use them at 400V. At 500V I guess you would just have to be careful, keep them dry etc. Above 500V you might need something with wider spacing.
Yep, I was going to suggest Bulgin but I was not too sure on their availability at J's location. Just wondering if the contact rating can be pushed by not using contacts either side of the B+ one? They probably quote a lower figure based on creep-age between adjacent contacts under various levels of humidy etc. Some of their connector range do however go up to 2.5kV.
Thanks Doz and Hi-Q. I like the recessed male chassis socket and the female plug on the cable side. And the cable shield continuity detection is a clever idea too..
My B+ will be well under 500VDC so..