[Hallicrafters] SX-71 S METER help

[Gerry Steffens]

The most common thing I have found that causes the performance you
describe is the AVC filter capacitor has gone south.  Find the AVC
circuit and there will be an electrolytic cap from the AVC line to
ground.

Gerry

Radio Historian for E.H. Scott & 
McMurdo Silver also collecting 
Hallicrafters, Zenith Transoceanic 
and any other interesting radios
Gerald Steffens P.E.
Oronoco, MN