On Tue, 15 Mar 2005 21:52:45 +0000, robert casey wrote:



One needs a special respect for working with
1,000v+ anode voltages.

Its a wonder more ppl have not been killed....

Another thing, it would be mandatory that the tubes
be fully enclosed in a cage, and that cage and the
bottom lid of the amp have interlocks to disable
the power supply if opened. No pretty wood boxes
with bare tubes on top. You can chrome or gold plate
the cage if you want to make it look pretty....

_Two_ sets of interlock switches. One to kill the power supply
and one to ground the B+ lead in case a bleeder resistor opens and leaves
the filter capacitors charged. I once shut down a 20KW transmitter for
preventive maintenance and heard what sounded like a pistol shot as I
opened the door to the power supply cabinet.