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 <ab...@arrl.net> To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] factory upgrade to K3(s) Message-ID: <1530147028885-0.p...@n2.nabble.com> 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 -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com