[Collins] 70K-2 PTO

[David Murman]

I have a KWM-2A RE that was built about 1972 and when I rotate the main 
tuning dial there are areas  that the knob moves but the frequency does not 
unless you put pressure on the tuning knob. Makes it difficult to tune in a 
sideband signal. I have tried to tighten the bushing but doesn't seem to 
help and if you get it off the wheel it is a bear to get back on.

Will this remedy the problem I have or can someone point me in the right 
direction. I have a 312B-5 that I use for the transmit side.


>> Finally, I have discovered that the PTO turns ever so nicely if you 
>> remove
>> one of those cupped washers from the front of the lead screw.  If there 
>> is
>> tension at this point, no amount of adjustment  of the concentric bushing
>> nut will give you that wonderful inertia feeling at the tuning knob.  The
>> shaft should turn quite freely, almost effortlessly or whatever I am 
>> trying
>> to saying!
>
> Reducing the end load on the PTO shaft means it will drift more from
> vibration and be be more apt to move the PTO slug when you push or pull
> on the knob (or have the rig mounted in Art's yacht).



Thanks;
David
WA4ECM