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)
Vintage Radio and Test Equipment
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