[Milsurplus] BC-221 with noisy tuning

[Ian Wilson]

I have a BC-221 with integral power supply. When I monitor the frequency on
an external
set, tuning slowly has a distinct 'warble' to it. This feels like some sort
of mechanical problem
(although I imagine it could also be due to something like metal whiskers
on the tuning
capacitor blades).

Once I stop turning the tuning control the output frequency is rock solid.
I can move it up/down
smoothly with the 'Corrector' control.

The tuning control doesn't have any grittiness to it when turned, but of
course there could be
backlash in the drive mechanism.

Suggestions welcomed.

73, ian K3IMW