"Andy Evans" wrote in message
...
I have some projects with 300b SET amps built on two chassis - power
supply and signal chassis. Right now I'm using amphenol 4 pin AP
series connectors for earth and HT - which is about 440v or 490vDC off
load.

I'm wondering about a simpler coax option, since I really only need HT
and earth (rest can be done with 4/5 pin XLRs and 4/8 pin speakons).
The umbilical can be fixed at the PSU end and detachable at the signal
chassis. So a female socket on the cable and a male one on the
chassis.

I have no experience of coax connectors - there's the cheap and
plentiful BNC, the more robust N type, then TNC, UHF etc etc. The
connector must be comfortable at 500v, but the other requirement would
be that the cable connector - presumably female - should be
sufficiently shrouded that it's very hard to touch since there's over
400vDC on it!!

Best choice here?


I have a valve phono stage with separate PSU and detachable 'Cliffcon'
umbilicals:

http://www.cliffuk.co.uk/products/cliffcon/index.htm

They are have a 'bayonet type' locking ring on the connectors and work very
nicely, but they aren't rated for 500V though. Contact them and ask for
their suggestions/recommendations - I'm sure you won't be the first to have
done so.