[Elecraft] K3 HI RFI NO Power output. ATU.

[Hugh Valentine]

Anybody Help??? Problem originated on 6M(affects all bands) when ATU was being used to Tweak SWR from 2.4 to 1.0:1. ATU constantly moved up and down tuning, never resting on 1.0:1Power output was intermittent(100W) would go to zero then back to 100 as ATU was looking for match.  Then, HI SWR,  RFI scrolls across screen as no power is coming out of K3.  Affects Ant 1 and Ant 2 SO239s on back of chassis.  Affects with RX antenna unplugged.  Any Band, any Mode.  Either VFO A or B.  Run both w/Antennas or Dummy Load.  Same result. Finally,  HI SWR, HI Cur, RFI scrolls across screen after power goes above 12W.(Never shows ANY power on the LED screen, only one Bar each time I transmit. Uploaded new Firmware and reset K3. On all bands...with or without ATU(eventually uninstalled it) on any antenna or on Dummy Load,  Rig shows Zero Power output as I go from 0-12.5 W then at any power over 12 Watts, the RX makes a variable warbling noise and normal receive is bypassed.  After a few seconds, the RX may come back on. I just installed a K9AY RX system not too far from XMIT ant.  But have been using it all bands no problem for 2 months. ATU always has difficulties matching low SWR on 160 and 6M. Any suggestions as to what is gong on?Anyone experience this before?  73ValN4RJ  
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