Hi Clay, Presently I have a pair of K3's. One is my main rig and one is my backup and traveling rig. I will sell my one K3 and keep the other as the backup and traveling rig when the K4 arrives. 73, N2TK, Tony
-----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Clay Autery Sent: Wednesday, June 5, 2019 12:05 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K4: superhet vs. direct sampling Was thinking the very same thing.... but I am not so sure I will be able to let my K3S go... I may just be adding... And then I can make the K3S a traveling system. ______________________ Clay Autery, KY5G (318) 518-1389 On 04-Jun-19 21:50, Bill Johnson wrote: > Wayne, all these options and modernizations, even though I love my K3S and > really don't need to upgrade, I will be "forced" to break down and buy one. > > 72 & 73, > Bill > K9YEQ > FT'er for K2, KX1, KX3, KXPA100, KAT500, W2, etc. > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > <elecraft-boun...@mailman.qth.net> On Behalf Of Wayne Burdick > Sent: Tuesday, June 4, 2019 9:19 PM > To: Elecraft Reflector <elecraft@mailman.qth.net> > Subject: [Elecraft] K4: superhet vs. direct sampling > > The superhet module buys a lot of BDR improvement. But also -- a subtlety > I've failed to mention so far -- the superhet module is intended to somewhat > improve 2 kHz IMDDR3 *and* make this figure more repeatable. > > Q: Say what? > > A: As Rob Sherwood noted many times before finally immortalizing this point > in his must-read footnotes, A-to-D converters sharing the same part number > are not all created equal. The long-time previous occupant of his Top Spot > benefitted from a never-corroborated monotonicity in its ADC's LSBs. An act > of god. The product of a very good day at the silicon foundry when, > serendipitously, all the bunny suits were defect-free, and no one was > exhaling molecules of grain alcohol or other substances from the night before. > > That said, most ops can get by without the extra BDR and IMDDR3, because > they're not situated in the RF equivalent of the Gulf Stream. Hence the > different K4 models. > > 73, > Wayne > N6KR > > >> On Jun 4, 2019, at 5:10 PM, Lyle Johnson <kk7p4...@gmail.com> wrote: >> >> Mark, >> >> The "20 dB lower than a K3" figure is an estimate for 100 kHz Blocking >> Dynamic Range rather than the 2 kHz Narrow Spaced Dynamic Range. >> >> The K3 is listed at 140 to 150 dB (depending on model, synthesizer, etc) on >> Sherwood's Receiver Test Data page. The K4 series without the "HD" option >> are estimated to be in the 120 to 130 dB range, typical of other direct >> sampling SDR products (Flex, Apache, Icom, ...). >> >> 73, >> >> Lyle KK7P >> >> On 6/4/19 4:00 PM, mark roz via Elecraft wrote: >>> Before putting my money up front for the first run of K4D I need to >>> know what is the dynamic range of the K4D RX at 2kHz spacing. K3 is 105 dB >>> and K4D? If it is 20dB lower than K3 than it would be 85dB-correct? > > > ______________________________________________________________ > 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 > k9...@live.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 > k...@montac.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 tony....@verizon.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
