Separate PSU to Amp connection

[Mosquito]

Hi Gents
I would like to ask if this one plug, plus an umbilical cord, and a suitable octal socket to plug in, can be a safe (cheap) way to carry the B from a separate chassis PSU, to an amplifier

 

[Doz]

Used to use that sort of thing with Yaesu tube ham radios. I'm not happy with it now, I use a high voltage BNC connector http://www.jyebao.com.tw/files download/MHV.pdf

 

[rsumperl]

Hi Gents
I would like to ask if this one plug, plus an umbilical cord, and a suitable octal socket to plug in, can be a safe (cheap) way to carry the B from a separate chassis PSU, to an amplifier

Good morning,
That's exactly the way I'm doing my power supply to amp cabling. I wanted to be sure I had enough "expansion" capability, so I'm using an 11 pin.

 

[Mosquito]

Thanks, I'm happy to hear that. It seems to be cheap, practical and safe, at least until 500VDC, I think..

 

[Hi_Q]

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.

 

[DF96]

Why not use a Bulgin plug/socket? These are 8-pin mains rated, with shrouded pins on the plug. I understand they are widely used for disco lighting, but I use them for HT supplies.

 

[Mosquito]

Why not use a Bulgin plug/socket? These are 8-pin

Interesting
Can you post a link or picture of these?
Thanks
J.

 

[Doz]

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.

 

[Doz]

http://www.bulgin.co.uk/PDFs/CatNo82/GenPurpose2005.pdf

 

[Doz]

Max rating for the bulgin falls short of your B+ of 500volts though...

 

[Mosquito]

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.

II'm a seasoned one, no Facebook no Tweet, and neither pets or kids around here..

 

[DF96]

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.

 

[Doz]

I don't think it's the pin to pin spacing that's the issue , with KV of breakdown listed in the spec. I suspect it's pin to finger spacing ! They aren't recessed very far.

 

[Hi_Q]

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.

 

[Mosquito]

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..