Hi Jim,
You would have to seriously compete in an SSB contest with some of the more modern radios in very crowded bands to fully appreciate how much better the more modern technologies are for both transmit and receive signal quality. The latest Flex radios are almost shockingly good, but all of the top-shelf modern radios are significantly better performers than the 12 year old K3 or even the K3S. We're discussing the most demanding situations affecting SSB transceiver performance: weak -- often distorted -- SSB signals surrounded by much stronger adjacent channel QRM. For much of the time on 20 and especially 40 meters the adjacent much stronger signals overlap well into the receiver bandwidth. Typical spacing between SSB signals is only 1.5 kHz, if you're lucky its 2.0 kHz and only rarely 2.5 kHz or more. This situation is rather unimportant for the casual contester, but its a game changer at the upper levels of serious SSB contest competition. I have not made technical measurements of K3 SSB transmitter and receiver performance nor do I have the capability to do so. I suspect the more modern designs have improved the dynamic response of their entire receiver and transmitter chain in ways that can't be captured by simple static performance measurements such as frequency response, dynamic range and IMD. 73 Frank W3LPL ----- Original Message ----- From: "Jim Brown" <j...@audiosystemsgroup.com> To: elecraft@mailman.qth.net Sent: Monday, March 30, 2020 12:32:52 AM Subject: Re: [Elecraft] The Big Three... Hi Frank, SSB is my un-favorite mode, and I don't have exposure to other contemporary rigs, so I'd be interested to get your perspective of what features/performance of the K3 are weak as opposed to the other radios. 73, Jim K9YC On 3/29/2020 10:09 AM, donov...@starpower.net wrote: > The K3 design is dated, all of the other top manufacturers have introduced > much higher performing SSB radios in recent years. ______________________________________________________________ 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 donov...@starpower.net ______________________________________________________________ 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
