David Looser wrote:
"Ian Bell" wrote
Except its discharge time would them be rather too long.

Too long for what?


Safety. One of the functions of the relay is to disconnect the HT if the
PSU connector is unplugged. If I just switch the ac and bleed the HT
there will be a significant HT voltage on the PSU connector for long
enough for someone to get a shock from it. That's one reason why I
prefer to switch the dc HT.

Cheers

Ian

David.