[Elecraft] K3 abruptly shuts off during CW transmission

[Lou Kolb]

I'm having a similar problem with k3 4290.  I have qrq mode turned on but 
when I engage the RIT which turns QRQ mode off and then transmit, the rig 
shuts down.  It also comes back on a different frequency when I power it 
back up.  If I leave the RIT off, it doesn't happen.  I thought it might be 
firmware related and had been meaning to reinstall version 436.  Then, 439 
was released so I just upgraded to it figuring that might solve the problem 
but no joy.  I'm at a loss to explain this so any thoughts would be welcome. 
Thanks.  lou  WA3MIX
----- Original Message ----- 
From: "K4SC" <k4swisscheese at yahoo.com>
To: <elecraft at mailman.qth.net>
Sent: Sunday, August 14, 2011 8:45 PM
Subject: [Elecraft] K3 abruptly shuts off during CW transmission


> After nearly two years of trouble free operation, I have developed a
> repeatable problem.  While transmitting on 40 meter CW on my usual antenna
> the K3 suddenly shuts down.  When I repower it, it comes back up fine, but
> has shifted frequency by about 1.5 kHz.  This is occuring during 
> relatively
> short transmissions.  Power was at 100 watts and swr was about 1.5:1.  I
> tried turning power down to 75 watts and it repeated.  I then switched to 
> a
> dummy load and it happens again; as I said it is definitely repeatable.  I
> even updated the firmware, no joy!  Any thoughts.  I operated cw mostly so 
> I
> can't say if this is also occuring on SSB.
>
> Thanks,  Chuck K4SC  South Carolina
>
> --
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