08-17-2018, 10:30 AM
Sounds like an open antenna input coil, or a "ground" connection. Simple continuity checks should prove it out. Often the coil primary/secondary has gone open from nearby lightning strike...
Do check that the AVC bus is not shorted to chassis, anywhere and that it is correctly wired.
Do not trust rivet to chassis ground connections, solder them to the chassis, even if there is a risk of scorching paint, touch it up... Common ohmmeter will not show a slight resistance...
Often the open coil can be repaired or rewound.
GL
Chas
Do check that the AVC bus is not shorted to chassis, anywhere and that it is correctly wired.
Do not trust rivet to chassis ground connections, solder them to the chassis, even if there is a risk of scorching paint, touch it up... Common ohmmeter will not show a slight resistance...
Often the open coil can be repaired or rewound.
GL
Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
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