K2 Transmitter Power Issue

[kc4wvl]

K2 s/n 4276
Firmware Revision(s):  2.04P  1.09

I am having a problem with output power stability. Example: Power set to 5 watts. When transmitting (into a dummy load), power out is all over the place, from as low as .2 watts to as high as 12 watts. This fluctuation is very rapid. Measured current (at the P/S) fluctuates with the power output fluctuation.

Can anyone give me an indication of any possible cause and solution?

Thanks.

73's de KC4WVL
William Smith

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[Don Wilhelm-4]

William,

Check the soldering carefully, particularly on the Control Board.  Also
check and re-check the placement of the components mounted on the back
of the Control Board (they are part of the power control circuits).

Check soldering, then re-check the soldering, and when that is finished,
check the soldering.

Good luck in finding it.
73,
Don W3FPR

kc4wvl wrote:

> K2 s/n 4276
> Firmware Revision(s):  2.04P  1.09
>
> I am having a problem with output power stability. Example: Power set to 5 watts. When transmitting (into a dummy load), power out is all over the place, from as low as .2 watts to as high as 12 watts. This fluctuation is very rapid. Measured current (at the P/S) fluctuates with the power output fluctuation.
>
> Can anyone give me an indication of any possible cause and solution?
>
> Thanks.
>
> 73's de KC4WVL
> William Smith
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft   
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>
>  

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