K3 HI RFI NO Power output. ATU.

[N4RJ]

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 se
 conds, 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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[Chester Alderman]

One should NEVER try to get a tuner to get a match with a load when you are
running high power, i.e., your 100 watts. The quickest way to blow out your
PIN diodes (or any T/R switching diode) is to subject them to the very high
reverse voltage when you have a bad match. In all likelihood, your antenna
switching diodes are blown.
Good luck and 73,
Tom - W4BQF


-----Original Message-----
From: Elecraft [mailto:[hidden email]] On Behalf Of Hugh
Valentine
Sent: Sunday, October 5, 2014 9:50 AM
To: [hidden email]
Subject: [Elecraft] K3 HI RFI NO Power output. ATU.

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 se  conds, 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
____________________________________________________________
The #1 Worst Carb Ever?
Click to Learn #1 Carb that Kills Your Blood Sugar (Don't Eat
This!)
http://thirdpartyoffers.juno.com/TGL3141/54314ce51d0674ce51596st01vuc
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
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