Harry:
I echo many others. either buy a noise bridge (tentec, mfj, vectronics, or
palomar engineers.
google "tuner tuner" for the palomar engineers version.
Also here is contact info for a man who has repared a kenwood ts520 (even
older than the 120). He might be able to help you.
Robert O Dostall KF8IY,
261 N. Main St.
Amherst, Ohio 44001
cell 440-653-1179
home 440-984-0084
E-mail [log in to unmask]
The fellows name is R