[R-390] Need PTO

[Mark Huss]

Does anyone have a working PTO to spare?  My 1956 Collins PTO has a 
slippage problem I think is due to wear.  With the Cal on, tune up to 
the cal signal and zero-beat.  Tune down a few hundred kHz.  Tune back 
up to frequency you cal'ed at.  Cal is still correct.  Tune up a few 
hundred kHz.  Tune back down to the frequency you cal'ed at.  Frequency 
is now off by about 1500 Hz.  Note you have to move off frequency about 
50 kHz for the effect to be seen.  The effect is quite repeatable.  
Cleaned the shaft ground connection without effect.
     Will throw in the old PTO if you want it.
Thanks.  Mark