[Amps] FW: AL-80b Problem?

[Bob Moore]

I am having some problems with my AL-80b.  Over the past couple of weeks the
power out has dropped from a typical 800-900w on all bands to 500w.
Symptoms
include the input SWR going from 1.5 to 3.0+ (depending on band).

On 14.025 the typical readings are:

HV:  idle 2975
       load  2800

Grid: 110
Plate: 300

100w in and 500w out

Just before this problem started I did have a bang come out of the amp,
which surprised me some

I suspect the tube is failing, any other ideas..........Bob,  KI6IV


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