[Amps] Alpha 76PA (3-hole)

[LU6ETB Arturo]

Hi Paul,

Do you see bias current? Just pushing PTT in SSB (no RF power) you have to
see very little plate current.

If not, check for a loose connection in the filaments volts transformer
connector.
It happened to me in Alpha 78.

73 de Arturo, LU6ETB

El jue, 17 abr 2025 a las 13:38, Paul Decker via Amps (<amps at contesting.com>)
escribió:

> Hey gang,
> I'm a little stumped.
> My alpha 76PA was humming along perfectly. Then all of a sudden, no
> output. HV is still good, no grid current, no plate current when
> transmitting.
> I've checked the input and output relays to make sure they are working.
> It acts exactly as if it was in standby, except the relay's change over.
> Does this sound like a bias problem? Maybe the bias circuit died? It seems
> unlikely all 3 tubes would die at once.
>
> Thanks,
> Paul
> kg7hf.
>
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