Doyle wrote:
> Help,
> Was operating RTTY when my Centurion Amp quit working. The symptom is
> that it shows 200 Ma Even in the Stnby position the plate current is 200 Ma
> & the tubes are moderately red. The tubes are only a year old. Any idea
> what might have happened? Looks like a trip a trip to TT.
> Anyone with a Centurion Amp have this symptom?
> Thanks,
>
> Doyle/N4VV
Was there any snap,crackle or pop ??
I would take a look at how TT provides cutoff bias. Usually its a zener
in the B-/filament center tap. I would also take a look at the meter
shunt resistor.
My last choice would be to run out and buy new tubes.
Ed W3NR
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