[R-390] Slow speed KC knob

[R390rcvr at aol.com]

Good day:

I posted the original question about a geared, fine tuning drive for the KC 
knob. I would also incorporate a spinner for faster cruising too. I still would 
appreciate any input on the geared knob idea. Miles was nice enough to share 
his execution of a panel mounted conversion, which I am very interested in, 
but would also like to explore a true knob contained system, that could be moved 
from radio to radio without modifying the rig.

Yes, I have seen the R-391 and R-389 autotune. I think the mech. will hold up 
OK to fast band scanning. Perhaps a bit better on the R-390 because of the 
heavier gearing compared the the A.

Would have to be careful about the 10 turn stops!

Randy