[Elecraft] Issue with the KX3, KXPA100 and software on 17m...can "hear" the serial commands

[Tom]

Hi, 
OK great. 

Also for the group, on my kx3 now that I have it connected to my real antennas,  I can hear an am broadcast on every band.  On certain bands it's tuned in perfectly to a station whereas on others
 You can hear the distorted bass. 
This is with my antenna in the attic.  On the mini beam,  it's gone.   Any ideas why the attic antenna is doing this? 
Thanks



-------- Original message --------
From: Wayne Burdick <n6kr at elecraft.com> 
Date: 08/02/2014  19:29  (GMT-05:00) 
To: tomb18 at videotron.ca 
Cc: Elecraft <Elecraft at mailman.qth.net> 
Subject: Re: [Elecraft] Issue with the KX3, KXPA100 and software on 17m...can "hear" the serial commands 
 
Sounds like you're missing a bypass capacitor on the serial I/O line. If you email customer support, they'll send you instructions on how to fix this. (Affects a small number of units.)

73,
Wayne
N6KR


On Feb 8, 2014, at 4:26 PM, tomb18 at videotron.ca wrote:

> Hi I was wondering if anyone else has this issue:
> 
> I have the KX3 and the KXPA100 connected through the wiring kit and I am connecting to the combo with Ham Radio Deluxe or Win4K3Suite. If I go to 17m, and the software is running I can literally hear the serial commands in my headphones. It sounds like tons of clicks, and chirping noises on 17M only. I also hear it on 12m but much quieter.It also shows up on the s-meter as an s-5 pulsing. If I turn off the KXPA100, the noise goes away. 
> I have tried a different serial port cable connected to a different port and there is no difference.
> 
> 
> It is definitely coming from the KXPA100. I never had this before I installed the amp.
> 
> 
> 
> 
> Can anyone here confirm to me if this is just my setup or are other experiencing the same issues?
> Thanks, Tom va2fsq
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