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Re: KX1 died. Where to start?

Posted by Oscar, WB5GCX on Nov 14, 2010; 1:27am
URL: http://elecraft.85.s1.nabble.com/KX1-died-Where-to-start-tp5734439p5736635.html

Don,
  Removed and re-seated the MCU.  No change in operation.  Also closely inspected for no/bad solder -- all looks good.

  Kept thinking about if I could have done anything to cause this.  I remembered I had both the KX1 and my K3 connected via 18" jumpers to a coax A/B switch to share my main HF antenna.  Was doing some receiver comparisons between the two, and have used this configuration to easily use the KX1 indoors with the main antenna.  Always before I have always disconnected the coax from the KX1 before transmitting with the K3 (as well as moving the A/B switch to the K3 position).

  The last time I had the KX1 hooked up this way, I may not have removed the coax from the KX1 before using my K3 on 40m cw, and 80m SSB.  I'm not sure I tried/used the KX1 after doing this.

  Could strong RF from the K3 maybe have "fried" the KX1 MCU (or other component)?  Perhaps the A/B switch isolation is not so good -- or stray RF, etc.?

Oscar, WB5GCX