[Elecraft] K2/100 Locks Up

[Don Wilhelm]

Jim,

I can't point to any particular component, but first check to see if you 
have an RF-in-the-shack problem
Transmit into a dummy load.  If it does not fail, then look carefully at 
your antenna system.

Assuming it fails with the dummy load as well as the antenna, then my 
best guess is that the problem in somewhere in the KPA100 T/R switch area.

73,
Don W3FPR

On 7/13/2013 12:07 AM, Jim Campbell wrote:
>
> For about a year I have been using my K2 in digital modes. For about 
> the first six months I used JT65 and then switched to JT9. For North 
> America I usually use 10 watts and for the rest of the world I use 20 
> watts. In both modes the transmitter is on continuously for one minute 
> followed by a minute off then another minute on, etc.
>
> This has worked well for me especially considering that I have a low 
> 88-ft dipole fed with ladder line, usually described as a 
> "cloud-warmer." Using JT65 I accomplished WAS and eWAS as well as 50 
> countries and 6 continents confirmed. (Being near the peak of the 
> solar cycle probably helped.)
>
> My problem is that if I am running 10 watts and hear a United Arab 
> Emirates station calling CQ (as I did this afternoon) and I crank the 
> power up to 20 watts the K2 locks up. And no, this isn't done while 
> transmitting. By locks up I mean that the only button-press that works 
> is power-off. When I power on everything is back to normal.
>
> The K2 is number 2268 and I believe that all updates have been 
> applied. The 100 watt amplifier was added later in the top of the K2. 
> I am using a KAT100 in its own case just below the K2.
>
> Any suggestions will be much appreciated.
>
> 73, Jim - W4BQP
> Licensed in 1953
>
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