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List:       elecraft
Subject:    Re: [Elecraft] KX3 - UHF emissions
From:       Darren Long <darren.long () mac ! com>
Date:       2014-06-28 15:54:26
Message-ID: 53AEE532.1030508 () mac ! com
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Thanks for following up on this Dave, it is really appreciated.  At least I know
that it's not just my KX3 now.

Cheers,

Darren, G0HWW


On 28/06/14 14:10, Dave wrote:
> Hi Darren, and everyone else following this...
> 
> I've found it!  Very low level, but by zeroing in on 385 to 386MHz I found a
> small signal that moves when I tune across 7MHz...
> 
> At 7.000MHz there's a signal at 385.027MHz (-78dBm) which moves up in frequency,
> staying at about the same signal level, and is at -78dBm at 385.571MHz with the
> dial set to 7.010MHz. Unplugging all of the leads appears to make no difference
> to the signal level. Nor does turning off the backlight or going onto internal
> batteries.
> 
> The problem I had yesterday was that there's a lot of much louder signals around
> 385.9MHz which were masking the KX3 signal.  With the dial set to 7.080MHz, and
> really zeroing in so as to exclude other signals, I found it at 389.419MHz
> (-75.5dBm) but I would need to go somewhere that excluded the larger external
> signals to hear it with another receiver.
> 
> I guess that with an antenna with a bit more gain it might be stronger.  I also
> had to keep resetting the display as it got hidden in much louder signals which
> did not appear to alter with VFO setting and I wasn't able to tell if they were
> from the KX3 or from external signals, of course.
> 
> Dave (G0DJA)
> 
> ----- Original Message ----- From: "Darren Long" <darren.long@mac.com>
> To: "Dave" <dave@g0dja.co.uk>; <elecraft@mailman.qth.net>
> Sent: Saturday, June 28, 2014 12:22 PM
> Subject: Re: [Elecraft] KX3 - UHF emissions
> 
> 
>> Hi Dave,
>>
>> I've have just repeated my measurements of the 7.080Mhz sprog on 398.4MHz and
>> posted some screen-shots on my blog.  See here:
>> http://www.g0hww.net/2014/06/kx3-uhf-emissions.html
>>
>> Cheers, 73
>>
>> Darren, G0HWW
> 
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