[R-390] Dangling PTO

[Rick Brashear]

I realize this is a R-390 list, but I am sure the PTO in my R-388 is 
about the same if not identical.  I have it dangling inside the 388 and 
I felt it better if I ask a question or two before I go further.  I need 
to adjust the end calibration, I think that what it's called, as I am 
unable to correct the dial with the "ZERO" adjustment on either end of 
all bands.  The 388 manual is very limited on information, suggesting to 
simply exchange the defective VFO for a properly functioning one.  I 
understand there is an adjustment under the can to take care of this.  I 
have yet to remove the can, so I' don't know.  It is a Collins PTO 
#70E-15.  Any help or direction would be most appreciated.  Do I need to 
remove the PTO completely from the circuit by taking the wires loose or 
can the adjustment be performed as is?

Thanks,
Rick