Hunter,

I had a similar problem many years ago.  It turned out to be the wrong crystal 
in the FS-4.  The fellow I purchased it from was using it to control a SPR-4 
receiver and I was using it to try and control R-4C frequencies. Changing to 
the proper interface crystal solved the problem.

GL,

Bob, K1NOK

PS  Hunter, check the crystal frequencies below for the FS-4 to operate with 
the R-4C.



R-4 and T-4X        9.6    Mhz crystal
SPR-4                   9.59   Mhz crystal
2-C                       9.5    Mhz crystal  and add 7 Mhz. to FS-4 readout 
for proper frequency.

  ----- Original Message ----- 
  From: Hunter Ellington 
  To: [email protected] 
  Sent: Thursday, October 07, 2010 6:19 PM
  Subject: [Drakelist] FS-4 Anomally


  Well, I managed to make a cable to hook my FS-4 up to my R-4C.  For some 
reason, when the FS-4 is controlling the radio, the received signals appear to 
be 9 Khz higher on the radio's dial than when the receiver PTO is controlling.  
Any thoughts?


  K0GFY  R. Hunter Ellington
  303-454-0543/720-560-8139
  P.O. Box 44
  Larkspur, CO 80118






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