K3 shuts OFF over 95w...

[Paul-30]

Mike,
I had this exact same problem during CQWW. It turned out to be RF getting into the K3 thru the contest keyer leads, which I had never hooked up before. Wrapping all the leads with RF chokes/toroids fixed the problem...check to see that you have not added something new recently. I also assume that if you have a beverage connected to the Aux Ant, that you also have an RF limiter in that line, as that can raise havoc with the K3 as power is increased--especially true when you add in a linear amplifier.

Paul
WY7I

>>>If power is set above 95-96 watts, the rig shuts down instantly when you
>>>transmit (at least in CW and if you press the TUNE button. Didn't try it
>>>on any other modes).
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[Mike Reublin]

Hi Paul -
As I said, it's a friends rig. I'm sure he doesn't have a beverage. No
clue if he's added anything lately, but I'll check when I see him again.

73, Mike

Paul wrote:

> Mike,
> I had this exact same problem during CQWW. It turned out to be RF getting into the K3 thru the contest keyer leads, which I had never hooked up before. Wrapping all the leads with RF chokes/toroids fixed the problem...check to see that you have not added something new recently. I also assume that if you have a beverage connected to the Aux Ant, that you also have an RF limiter in that line, as that can raise havoc with the K3 as power is increased--especially true when you add in a linear amplifier.
>
> Paul
> WY7I
>
>  
>>>> If power is set above 95-96 watts, the rig shuts down instantly when you
>>>> transmit (at least in CW and if you press the TUNE button. Didn't try it
>>>> on any other modes).
>>>>        
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>  

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[Reinaldo Leandro]

Just check the connection at the power supply. Mine was bellow my operating
desk and after a few days of frustrations, looking for RFI, installing
ferrites, RF chokes I finally discovered that the nut at 5 way binding post
was loose. I had the right voltage on standby but not enough transmitting.

73

Reinaldo, YV5AMh

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