[R-390] R 390A Gear Train

[triode45 at aol.com]

Hello,

I am working on my old Motorola R 390A and decided to rebuild the RF deck. I followed the directions in the manual and have all of the cams aligned and have the overshoot of the Veeder root counter at +035.
Everything is now smooth but I have a problem. Let me say that I was able to tension all of the anti backlash springs properly. 
The problem is if I turn the kilocycle knob quickly to the bottom of the band and back up, the Veeder root counter will be a little lower, say +034. If I repeat this a number of times, the counter will continue to drift lower. I have double checked all of the nonmar clamps and all are reasonably tight.? Any help will be appreciated..

Thanks,

Alfred 
SWL and Ham Band Listener