[Elecraft] K3 Abnormal Behavior

[Jim Kennedy]

Hi Don, I have checked it with both my Bird 43 and Daiwa CN801. Both with the same results. Now with the K3 warmed up there is no problem. I will have to wait for another cold start since I didn't even bother to see if the power meter in the K3 was tracking with the other two. I'll post again when on a cold start if the K3 tracks the same.

Tnx es 73's
Jim
W7OUU

----- Original Message -----
From: "Don Wilhelm" <donwilh at embarqmail.com>
To: "Jim Kennedy" <kennedyjp at cableone.net>, "elecraft" <elecraft at mailman.qth.net>
Sent: Sunday, December 1, 2019 11:09:08 AM
Subject: Re: [Elecraft] K3 Abnormal Behavior

Jim,

How were you observing the power increase?  There is a big difference in 
how your situation can be analyzed depending on whether the power 
increase is noted by the K3 display or whether with an external wattmeter.

I am not saying that you have no problem, but that the area to look can 
be different depending on how you observe the power increase.

73,
Don W3FPR

On 11/30/2019 1:26 PM, Jim Kennedy wrote:
> Fired up my K3 the last couple of mornings and noticed this. As the autotuner was searching for a solution the power output was slowing rising. Not so unusual right . But, after the tuner made a match the K3 was reading about 40w of output. I went into tune mode again (key down), the antenna was matched 1:1 but the output was slowly coming up so I let it continue. A slow climb to full output after about a minute or so was achieved. I have eliminated the tuner as the problem by using it on another transceiver. I'm thinking it may be a heat related issue somewhere, my guess is it's possibly on the PA board and possibly a solder problem, but then again it could be that same issue anywhere in the drive chain. If I don't transmit for a period of time it will repeat but not as bad as from a cold start. No other abnormal behavior has been noted. Any ideas ? Thanks in advance. Serial # 3378