[Elecraft] K2 Transmitter Power Issue, K2 s/n 4276

[kc4wvl]

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

Finally had time to open up the rig and check the soldering and check the
placement of the components on the back of the control board.

Still no change. When transmitting, again the power output fluctuates
rapidly and the current draw fluctuates as well.

Help!

73 de KC4WVL
William Smith


----- Original Message -----
From: "Don Wilhelm" <w3fpr at embarqmail.com>
To: "kc4wvl" <kc4wvl at peoplepc.com>
Cc: <elecraft at mailman.qth.net>
Sent: Tuesday, December 11, 2007 17:01
Subject: Re: [Elecraft] K2 Transmitter Power Issue


> 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
> >
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