[R-390] Noise when warm ('390A)

[Tim Shoppa]

> And then there's also the story that the antenna trimmer shaft is
> actually at AGC potential in the RF dec.  Too much oil and grease on
> it can create a path to ground there and mess up the AGC in the RF stage.

On my blue striper, where the rubber spacer fell was decayed to such
a point that it was a messy goo, I replaced it with some glass-epoxy
washers.  Worked like a charm, even if not quite original.

Tim.