Fw: KX3 2 mtr ATU problem

[ejkkjh]

This is my second post on this problem, got no replies on first one, still looking for help for transmitting below 5 Mhz and getting very high SWR.
I also connected a dummy load directly to the KX3, same problem.
Using the tune button and by-passing the ATU get SWR readings of 99.9 with dummy load on freqs below 5 Mhz?
So it probably is not the ATU.
When installing the 2 meter module I had to move the inductors, the 2 mtr antenna connector was touching one inductor, fit was very tight.  
I have rechecked 2 meter module install nothing obvious.
Thanks for help.  73
Emory  WM3M

From: [hidden email]
Sent: Saturday, August 16, 2014 7:41 PM
To: [hidden email]
Subject: KX3 2 mtr ATU problem

I installed the KX3 2 meter module about a week ago, it all seemed to go ok.
The module seems to work fine but now the ATU in the KX3 will not tune up on 80 or 160.
Best SWR KX3 shows is  about 10-1 on freqs I have used many times before where ATU used to get near 1.1.
I used same cables, antenna, with different tuner and HF rig, two different antennas, tune up fine as before.
Any help or ideas would be appreciated.  73  and Thanks
Emory  WM3M

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[Don Wilhelm-4]

Emory,

A display of 99.9 SWR normally indicates either a short or an open circuit.
It has to be somewhere between the wattmeter and the dummy load - in
other words, it *has* to be in the ATU to make any sense to me.
It is strange that you see this only below 5 MHz - are the other bands OK?

73,
Don W3FPR

On 8/18/2014 8:10 AM, [hidden email] wrote:
> This is my second post on this problem, got no replies on first one, still looking for help for transmitting below 5 Mhz and getting very high SWR.
> I also connected a dummy load directly to the KX3, same problem.
> Using the tune button and by-passing the ATU get SWR readings of 99.9 with dummy load on freqs below 5 Mhz?
> So it probably is not the ATU.
> When installing the 2 meter module I had to move the inductors, the 2 mtr antenna connector was touching one inductor, fit was very tight.
> I have rechecked 2 meter module install nothing obvious.
> Thanks for help.  73
> Emory  WM3M
>

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[ejkkjh]

For follow-up - Problem ok now.
I moved the internal antenna cable and KX3 is working fine now.
This time I was very careful when putting the case back on.  I think the
case moved the antenna cable out of position as shown on page 27, figure 21
of 2 mtr module instructions.  Once antenna cable was not touching or over
the toroidal inductor no problems with SWR.
Thanks Jeff for the tip and all others who responded.  73
Emory  WM3M

-----Original Message-----
From: Jeff Herr
Sent: Monday, August 18, 2014 8:22 AM
To: [hidden email]
Subject: RE: [Elecraft] Fw: KX3 2 mtr ATU problem

I saw your post but I thought someone better qualified would respond.

I had a similar problem.

I went back into the unit to find the antenna cable had shifted and was
right over the top of one of the atu toroids.

see fig 23 in the assy manual.

i set it back to pointing direct to the card edge, closed it up re-tested
and was back in business.



Jeff Herr,  WW6L
4636 Kelton Way
Sacramento, Ca 95838
916.925.6089






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