Re: Remote Power Supply Connection

"Ian Iveson" <IanIveson.home@[EMAIL PROTECTED]
> wrote in message
news:crMWj.5272$1q4.981@[EMAIL PROTECTED]
> Trevor Wilson wrote:
>
>>>

> Also, transferring the filter caps to the amp would mean that both plug
> and socket would be live at the time of parting. I have seen it said
that
> a diode in the amp solves this problem, but I wouldn't entrust my life
to
> that solution.

You have to use a method (something like a sensing loop
with a relay) to shut of the DC from the connectors if the
cable is disconnected at either end.  If a round connector
is chosen, it must be one one with a deep screw collar or
bayonet latch, so there is no access to the pins while the
connector is still making contact. That is why an octal plug
socket cannot be used, although Patrick seems to have
found an innovative way to make that combination safe.

Common sense would dictate the fitting and removal of
the DC umbilical only when the amplifier and PSU have
bveen switched off for some time.

A power diode, as an additional safety measure works
well. These are well-proven techniques from rack-mounted
broadcast equipment in the tube era.  But it is also im****tant
to comply with modern safety standards.

Iain