Joe, Pity this distinct difference is not advertised widely for those folks not well versed in the importance of receiver specs.
But I have to add that lurking on this reflector is certainly a good way to learn what is important when evaluating a transceiver. I place great emphasis on receiver specs and antenna selection. These to me are the most important. You gotta here them to work them. Glad I upgraded my K3 (2007) vintage, guess now mine can be termed a boat anchor? 73 Gary -----Original Message----- From: "Joe Subich, W4TV" <[email protected]> Sent: 11/11/2015 10:25 AM To: "[email protected]" <[email protected]> Subject: Re: [Elecraft] Sherwood Receiver Test Data - K3S Added Today Of note - the K3S and K3 with new synthesizers were essentially +/- 1 dB of each other and swapping the advantage from test to test. This is good news for owners of the original K3 - the synthesizer upgrade will provide every bit of the performance "upgrade" in the K3S. > Looks like the K3S should be above the Flex because the Flex achieved > 2DB higher due to: > > Footnote Y --- "This is a testing anomaly of a direct-sampling > receiver." Yes, the Flex-67000 should be dropped significantly because it can not produce the both claimed dynamic range and noise floor (weak signal sensitivity) at the same time. Multiple -30 dBm (105 dB DR referenced to -135 dBm MDS) signals will cause ADC overflow with noticeable clicking and popping (distortion) with the preamplifier enabled. Turn off the preamplifier to prevent ADC overflow and the MDS degrades to -118 dB (nearly 20 dB less sensitive) and completely unsatisfactory above 20 MHz or so. 73, ... Joe, W4TV On 11/10/2015 6:58 PM, Steve Ellington wrote: > Looks like the K3S should be above the Flex because the Flex achieved 2DB > higher due to: > > Footnote Y --- "This is a testing anomaly of a direct-sampling receiver." > > Congratulations K3S > Steve N4LQ > > On Tue, Nov 10, 2015 at 6:48 PM, Bill Breeden <[email protected]> > wrote: > >> >> Rob Sherwood added the K3S to his Receiver Test Data page today. >> >> 73, >> >> Bill - NA5DX >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
