[Elecraft]K3 Open Pot on 52.450 mhz

[Russ]

I just checked these freqs/modes on my K3/100 (ser 732, FW 2.46, stock 
2.7KHz filter) and could not duplicate this.  I manually scanned from 53.3 
to 52.5 and ran across a few weak birdies but nothing like what has been 
described here.  You may want to check the archives because I seem to 
remember this issue coming up a few months ago but don't know what the 
resolution was.

Russ, N3CO

----- Original Message ----- 
From: "John Buck" <kh7t at arrl.net>
To: <Elecraft at mailman.qth.net>
Sent: Sunday, November 09, 2008 1:21 PM
Subject: Re: [Elecraft]K3 Open Pot on 52.450 mhz


>I confirm this on S/N 125 FW version 2.63
> DATA mode on 52.445.81.
> The K3 is very microphonic at that frequency in Data mode. The frequency 
> changes with SHIFT and with MODE and crystal filter XFIL selection.
> With 1.8k filter the tone is found at 52.447.66 at a lower level and the 
> microphonic effect is less. With the 500Hz filter the tone is heard at 
> 52.446.75.  Just a little microphonic with the narrow filter.  The 
> frequency jumps appear to be related to the filter frequency offset 
> setting.
>
> For me this is not an issue as long as it does not show up elsewhere, but 
> the tone could be important for some transverter users.
> Oh my!  Did we finally find something to complain about or will Wayne and 
> Lyle make it go away as usual?  I certainly hope this will not become a 
> distraction from the existing to do list.
>
> Aloha,
> John KH7T (K3 #125, practically perfect and getting better every day)
>
> Mike McLendon wrote:
>> I think all K3s probably do this.  Mine does at 52.445.81!  I suspect we 
>> are
>> listening to the synthesizer and the vibrations a modulating the 
>> frequency
>> via a mechanical path to the L component in the oscillator.
>> Mike, KE4U
>>
>>
>>
>
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