If I remember correctly, the new synths also fix some operating limitations of the K3 in high-speed QSK, which was my principal reason for making the switch. Receive recovery time seems shorter.
And I believe they extend receiver usability in VLF from 500 down to 100 Khz or so, for 220M.
At the time they became available Elecraft published an FAQ about the new synths, which might still be available online.
As for what the old synths can be used for when removed, the best I heard was drink coasters. I tried to give mine away but there were no takers even at zero dollars, shipping prepaid.
Ted, KN1CBR
------------------------------
Message: 7
Date: Wed, 27 Jun 2018 17:50:28 -0700 (MST)
From: ab2tc <
[hidden email]>
To:
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Subject: Re: [Elecraft] [K3] factory upgrade to K3(s)
Message-ID: <
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Content-Type: text/plain; charset=us-ascii
Hi all,
There is a bit of misinformation in this thread. The new synthesizer does
not make any difference to the noise floor in the absence of strong nearby
signals. This is how noise floor is usually measured. What it does is
improving the reciprocal mixing of nearby signals and the phase noise on
transmit. This improvement is significant. But the basic sensitivity of the
receiver (noise floor) is not affected.
AB2TC - Knut
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