[ARC5] lubricating BC-221 or LM freq meter gearing

[Dennis Monticelli]

I have the LM version and while the freq knob turns freely I can feel every
tooth engage and disengage; it's a bit rough.  As far as I know no
lubrication was used originally (except for the shaft bearing which is not
the issue) so the good news is nothing as gummed up.  But I wonder if
judicious application of the right lubricant would make the tuning much
smoother.  I did check the action of the anti-backlash and it is working
correctly.  Has anybody tried applying lubricant to smooth the worm gear to
anti-backlash gear interface?

Dennis AE6C