[R-390] PTO 70H-12 problem

[Clemens S.Ostergaard]

Hi everyone, 

A "new" EAC R-390A  being renovated  (recapped, etc.) has turned out to
have a problem preventing calibration. The PTO variation is insufficient,
with the end-point adjustment screw all CCW it covers 977.13 kcs, all CW
983.55 kcs. A friend of mine, who has the sufficient skill and learning,
took it apart and it proves to have been tampered with: windings off the
adjustment coil and the linearity-coil also seems to have been maltreated.
White salt-like deposit all over the insides, but this is perhaps not so
grave. I have (large) digital pictures if anyone wants. Mechanically it
seems OK and it was functional, though sometimes with a kind of slight
wobbling when tuning through a heterodyne. 

Here in Europe, spares are not thick on the ground, so I reckon my best
chance is to ask the list if anyone has a spare PTO to sell. Payment in
unmarked dollarbills, hi. Alternatively, does anyone have positive/negative
experiences with PTO's from Fair Radio? 

And while I am asking questions: why not put either the training manual
TM-4000 or the STP called "Troubleshoot the radio receiver R390A/URR to the
faulty component" on the phenomenal R390A website?  

Best,  (and hope to hear from you) 

Clemens S.Ostergaard
Aarhus, Denmark

R-390A's, SP-600, 51J-4,  and searching..