[Elecraft] K3 - RF Board - C238 - AGC change

Andrew Catanzaro acatan at wi.rr.com
Tue Feb 5 09:32:39 EST 2013


I did the mod shortly after it was described here.  The change in AGC behavior was not subtle.  Yes it improved copy in pileups when I was the DX.  I found it a bit difficult to cope with, though, because the changes in audio strength amongst the stations was more than my ears have an appetite for.  I had some trouble putting up with the loud signals challenging my ears by the time I had the volume up enough to discern the weak ones.  I believe subsequent firmware changes have obviated the need for this mod.  I plan on removing the extra cap. YMMV.  This is only my experience and my observations.

73,

Andy

  
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Message: 11
Date: Mon, 04 Feb 2013 16:37:20 -0500
From: "N2TK, Tony"<tony.kaz at verizon.net>
To: "'elecraft'"<elecraft at mailman.qth.net>
Subject: [Elecraft] K3 - RF Board - C238 - AGC change
Message-ID:<[email protected]>
Content-Type: text/plain;	charset="US-ASCII"

A year or so ago there was discussion about adding additional caps to C238
to reduce IMD. I believe it was two 1-uf caps.

What was the outcome of that? Did it make a noticeable difference in pileups
or for weak signal detection?

Is it a recommended mod?

  

73,

N2TK, Tony




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