[Amps] Ameritron AL-80B power output meter problem

[Jose V. Gavila]

Hello all,

I am trying to fix an AL-80B amplifier which has a problem with the 
FWD POWER meter. The meter itself is fine (it moves freely end to 
end), but when transmitting, maximum power it shows is about 500W, 
regardless of real power output (which goes higher, as checked with 
my trusty Bird 43)

It is as if the scale had a compression in the upper side. Internal 
amplifier adjustment pot does very little regarding the 500W max 
indication. I suspect of the operational amplifier (LM324) which 
manages that meter but, as access to it is a bit difficult, I would 
like to have some more clues before dismantling the unit. Any hint :-)?

Best regards,

JOSE
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  73 EB5AGV - JOSE V. GAVILA
     IM99sm La Canyada - Valencia (SPAIN)

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