[Kenwood] Fw: TS-520S Warbling VFO

[Robert Bacharach]

Hello Folks,

I attempted to use my old TS-520S yesterday (it has been off the air for well over a year) and noted a warbling and drifting VFO on receive.  RX sensitivity seemed fine, as before.  This condition was not present when I last used this rig.

I did not transmit to avoid putting a poor quality signal on the air.
Does anyone have a suggestion for a starting point for troubleshooting this problem.

73 & Thanks,    
Bob  WA2EMF
Rock Hill, SC