Joe,
Not familiar with the SB-1000 but if it works on all other freq's then of
course the 75/80 Meter circuitry is suspect. The most obvious part would be
the C1 padder if the amp uses one. Second is the C2 padder, if it is a brown
500 mmf mica replace it first as I have known these caps to split open, then
the tank tunes all over the dial like an L net. antenna tuner.
Bob,w5pvr
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