[Kenwood] Fw: TS-520S Warbling VFO

[Don Graham]

G'day Robert,

I think this sounds like the classic problem that TS520S's have - i.e. 
bad contact on the wiper of the VFO tuning capacitor. Apart from 
vigorous swinging of the tuning dial to and fro to temporarily 
improve the problem it's necessary to dismantle the VFO to get at the 
capacitor inside the can and clean and lightly re-lubricate the wiper. 
It worked in my case and my TS520S is once more as good as new in 
that department.  A service manual is helpful in getting it all apart.

73...Don VK6HK 

 

> 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
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