[R-390] BFO Turns Counter (was RE: Spinner knob for R-390)

[ToddRoberts2001 at aol.com]

In a message dated 9/16/2006 8:45:44 PM Eastern Standard Time, 
jlkolb at jlkolb.cts.com writes:
Do those devices actually provide a  reduction drive? From the pictures
I've seen, the just look like a turns-counting knob as would be used
on a multiturn pot.  If the standard pot knob, they would provide a 1-100
scale over 360 degrees of rotation, thus allowing the BFO to be returned
to a precise setting, but not a gear reduction.

John

The BFO turns counter knob is direct-drive to the BFO PTO. The turns counter 
reads 1-10 for one complete revolution of the BFO shaft but the counter reads 
in tenths also so it is like having a scale of 0-100 for one complete 
revolution. The turns counter knob is large so it gives a somewhat precise setting but 
it is direct-drive. There is sort of a ring and pinion gearset that drives 
the BFO turns counter. So if you turned the BFO knob 1/4 turn clockwise the 
counter would go to 2.5 or it would look like 000-025. It is not calibrated to 
anything so you would still have to find out by trial and error just how many 
digits on the counter means +1KHz etc. 73 Todd WD4NGG