[Amps] AL-80B Problem

[Thomas F. Giella]

I have an Ameritron AL-80B amplifier that has developed a problem. The plate and grid meter values will intermittently change. 

The grid lg value goes from 0 to off scale in the negative and the plate Ip value from 0 to +150. When this happens I can’t get any output power. 

Any help would be appreciated.

73 & GUD DX,
Thomas F. Giella, W4HM
Lakeland, FL, USA

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