[Test-Equipment] AN/URM-25F problems

[Bob Young]

I'm new here, my AN/URM-25F has always has severe backlash since I bought 
it, I took it apart and found an adjustment that should have taken care of 
it, (it presses the worm gear against the round gear driving the variable 
cap). It was not even touching so I adjusted it down a little bit, put it 
back together and I have no RF output now, all tubes are good, I can't see 
where I did any damage, the modulation still works. Worst of all a little 
set screw fell out of it or it was a huge coincidence and I can't figure out 
where this came from. Anyone have any ideas or does anyone know a place 
where I can get this reconditioned?

Bob
KB1OKL