K3 strong signal handling

Posted by Eric Scace K3NA on May 06, 2009; 3:24am
URL: http://elecraft.85.s1.nabble.com/K3-strong-signal-handling-tp2808353.html

Hi Wayne --

   I always get nervous when I see diodes proposed to clip strong RF.

   One of the biggest problems we have in a multi-transmitter site
(DXpedition or multi-TX contest station) is IMD generated by diodes
rectifying RF and re-radiating the result back into the local
environment.  Even a nearby AM BC station can induce enough voltage on
cause diodes to start rectifying.

    IMHO, if some guy wants to listen to a full-power signal from <100m
away, it is his responsibility to insert an appropriate external attenuator.

   I really don't want to see the performance of the K3 (AGC on or off)
compromised in any way whatsoever to handle such an atypical scenario.

73,
   -- Eric K3NA
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