[Boatanchors] Please review & comment on my Heath Warrior HA-10 amplifier design changes

[Rick Poole WA1RKT]

From: "Gary Schafer" <garyschafer at largeriver.net>
Sent: Sunday, November 23, 2014 12:16:43 AM
>>
>> Don't forget to place the safety diode from the junction of the
>> plate meter shunt and HV choke with the cathode to the choke and
>> the other side of the diode to ground. This keeps the negative
>> side of the HV close to ground in case a tube or something should short.

I planned on adding two voltage clamps to the filament lines per http://www.w8ji.com/al811_important_modifications_changes.htm (Tom W8JI).  Wouldn't that do more or less the same thing?  It would clamp the negative side to around 150-170 volts which is a lot higher than doing it your way but would it not provide sufficient protection?

The other alternative would be a zener diode of nominally 10-12 volts from the junction of the plate meter shunt and HV choke to ground.  That should do it without having to install a dozen diodes and associated 0.01-uf caps, right?

Rick WA1RKT