Should I worry about damaging the output tube?
I need to power up this old 5CX3000A pentode amp in a limited way to
proceed with my checkout. I am nowhere near to applying HV and drive yet,
but think I have the bias and SG supplies operational and need to check out
a few voltages and circuits. There is a ton of supporting/protective
circuitry that I want to observe and try to understand (no schematics).
I am concerned about powering up the main tube because I read warnings
about operating without plate HV, but perhaps this doesn't apply as long as
there is no drive.
As far as damage to the big tube is concerned, should I be worried about
damage to it if I power up all but the drive and HV? I KNOW I have bias on
grid 1. I am not sure the screen grid actually has voltage until I smoke
test, because it looks like that circuit is awaiting some relays to pull in
that probably will in this next step. Any tips/advice/whatever?
Thanks
Jerry W4UK
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