[Amps] GS-35B test at low voltage

[N1BUG]

I have never worked with a GS-35B and it has been almost 20 years 
since I had any triode experience.

I have a VHF amp with a single GS-35B and a home brew bias board 
taken from the G3SEK triode board manual. Per the test procedure 
described in the manual, the bias circuit is OK with adjustment 
range of 27 to 50 volts.

After running filament and blower for 24 hours I wanted to see if 
everything looked OK with low B+ and run it with some idling current 
for 24 hours. The only supplies I have are 4000V and 1000V. With 
1000V on the amp there was no sign of idling current and bias 
adjustment range was 12 to 15 volts. I realize this is very low B+ 
for this tube but I expected to see some sign of life.

I am assuming I have a bad tube. Any other possibilities? Other 
checks I can or should do?

73, Paul

-- 
Paul
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