[R-390] unstable BFO note on R-390A

[Bob Young]

I use the BFO frequently to zero beat the carriers on BCB. It is off by 
maybe 200 CPS for one thing after moving the BFO knob as much as it could go 
to one side, is this an easy fix to align the BFO? Also although I feel no 
backlash it is jumpy when tuning with it on. If I move the tuning knob up 
and down the BFO will jump to differing frequencies and sometimes stay off 
center. One of the springs on the split gear is shorter than the other, 
could this cause this problem, or is this more indicative of worn gears 
maybe? Any other ideas? thanks, it is worse when warm.

Bob Young
Millbury, Ma