[Heath] SB-104 VFO question

[G3OOU at aol.com]

Hi Sandy

 
If the audible signal jumps in frequency as you tune then it is probably  
the rotary contact(s) on the VFO tuning capacitor that have dried out or you  
have an intermittent contact somewhere in the VFO. The former is a common  
problem on the SB-Line valve rigs and is easy to cure once you can get at 
the  tuning capacitor to re-lubricate the bearings and sliding contacts.

I recall that another suggestion was to solder a length of braiding between 
 the rotor and the body of the tuning capacitor although I have not tried 
that on  my rigs.

 
73

Bob

Bob F Burns
C Eng,  FIET, MSE
Amateur Radio Callsign: G3OOU
Registered RSGB  Instructor
G-QRP Member No: 6907; Zone: 14, QRA: IO91WH; WAB:  TQ25
Secretary of Crystal Palace Radio & Electronics Club: _www.g3oou.co.uk_ 
(http://www.g3oou.co.uk/) 
Technical web site: _www.qsl.net/g3oou_ (http://www.qsl.net/g3oou) 
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