[Elecraft] K3 sun rcvr problem

[Jeff Cathrow]

 Hi Joe; Don't despair---I once had the same problem with my sub rcvr going out after operating split one time.  Diagnosis was tough and I don't think anyone ever figured out what happened; after a good number of helpful but fruitless emails from Aptos I removed my sub and shipped it off to Elecraft for further troubleshooting.
 
They found absolutely nothing wrong with it and sent it right back to me.  I reinstalled it carefully as when I built it but still no joy.  I double checked all the connections, filter configuration, etc. and everything was in place correctly.
 
Just about when I was about ready to pull my last strands of greying hair out---I went through a whole new TX gain calibration (IIRC---it might have been another function but I'm 95% sure it was that).
 
Voila! My sub sprang back to life as if nothing had ever happened!  My only somewhat educated guess is that some stray RF from my full-bore QRO operation running split in hopes of snagging a DXpedition knocked the TX gain calibration out of whack (or something like that---others more technically inclined may well chime in with differing opinions) and thus my sub went almost deaf like yours (same symptoms exactly).
 
So get out your K3USB cable and try another TX gain calibration; it will probably cure what ails your K3's sub (fingers crossed).
 
73 and GL,
 
Jeff, NH7RO/AE (just passed my Extra exam yesterday afternoon; yippee!)


 
 
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