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Mosquito 7th October 2010 09:03 AM

Separate PSU to Amp connection
 
1 Attachment(s)
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 7th October 2010 10:22 AM

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%20download/MHV.pdf

rsumperl 7th October 2010 10:28 AM

Quote:

Originally Posted by Mosquito (Post 2325193)
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 7th October 2010 10:53 AM

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

Hi_Q 7th October 2010 10:59 AM

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 7th October 2010 11:15 AM

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 7th October 2010 11:30 AM

Quote:

Originally Posted by DF96 (Post 2325271)
Why not use a Bulgin plug/socket? These are 8-pin

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

Doz 7th October 2010 11:30 AM

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 7th October 2010 11:31 AM

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

Doz 7th October 2010 11:32 AM

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


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