Hi Dave, I am remoting my VY2TT station. Unfortunately it didn't happen before the Pandemic. For me, the most difficult challenge was remoting the panadapter. K4 = problem solved. Anyone anywhere with a *tablet* and internet can have a virtual K4 at their fingertips. As great a radio as it is, the K3s can't do that.
73, Ken, K6LA / VY2TT On Fri, May 28, 2021 at 1:09 PM David Gilbert <[email protected]> wrote: > > I have a K3 with the new synths and nothing in the Sherwood data or > Wayne's post gives me any reason to switch to a K4, especially given the > cost to do so. Bells and whistles are completely secondary for me > compared with basic performance, and I still think that abandoning the > K3s was a mistake. > > 73, > Dave AB7E > > > On 5/28/2021 10:55 AM, Paul GACEK via Elecraft wrote: > > Congrats Wayne and team on the K4 evaluation. > > > > The two other responses do somewhat beg the question about what happens > to the K3s used market and pricing. Not a lot of K3s for sale unlike the > trickle to flood of k3. > > > > At one point, I thought people were hanging on to their K3s waiting for > a K4 upgrade which might well still be valid but I also wonder if people > will simply stay with the K3s as the performance is clearly great and forgo > the flexibility an SDR rig brings. > > > > Paul > > W6PNG > > www.nomadic.blog > > > >> On May 28, 2021, at 10:32 AM, Henry Pollock - K4TMC <[email protected]> > wrote: > >> > >> I Love my K3+(new syn)! > >> > >> 73, > >> Henry - K4TMC > >> (K3 #98) > >> > >>> On Fri, May 28, 2021 at 1:22 PM BRUCE WW8II <[email protected]> wrote: > >>> > >>> I LOVE my K3s > >>> > >>> Bruce > >>> WW8II > >>> > >>>> On Fri, May 28, 2021 at 12:31 PM Wayne Burdick <[email protected]> > wrote: > >>>> > >>>> Sherwood has posted his measurements of the K4D's receiver > performance in > >>>> his table: > >>>> > >>>> http://www.sherweng.com/table.html > >>>> > >>>> We're quite pleased with his test results, which confirm that the > K4/K4D > >>>> is near the top of its class (direct-sampling SDRs). A K4HD would > provide > >>>> somewhat higher dynamic range for those stations in extreme signal > >>>> environments, but the vast majority of operators will find that the > >>> K4/K4D > >>>> more than meets their needs. > >>>> > >>>> I'd like to highlight a few important items in Rob's chart. > >>>> > >>>> First, the K4D has a high 2 and 20 kHz dynamic range value of 101 dB. > >>>> Because it's a direct-sampling radio, this figure will hold at nearly > all > >>>> offsets from strong signals. Second is the block dynamic range number > >>> (128 > >>>> dB), higher than almost every other "pure" SDR measured. Finally, > there's > >>>> the LO noise (local oscillator; 148 to 155 dB) -- again, very > favorable > >>>> compared to all competing SDRs. This is an important number correlated > >>> with > >>>> reciprocal mixing dynamic range (RMDR). > >>>> > >>>> Taken together these demonstrate that the K4D will offer excellent > >>>> performance in crowded band conditions. > >>>> > >>>> Inevitably a question will arise regarding the chart position of the > K4D > >>>> relative to a couple of our other transceivers: the K3S and KX3. > There's > >>> a > >>>> bit of "apples to oranges" in both comparisons. > >>>> > >>>> The K3S uses a superhet receiver architecture. The K4HD will provide a > >>>> receive setting that emulates this superhet performance when and if > it's > >>>> needed. But the "pure" (direct sampling) method used by the K4 (all > >>> models) > >>>> has many advantages. One is the elimination of artifacts associated > with > >>>> crystal filters. Another is that, as a pure SDR, the K4 has a far more > >>>> flexible architecture. We'll be able to provide updates to the receive > >>> and > >>>> transmit digital signal chains that cannot be added to a superhet like > >>> the > >>>> K3S or its competitors. > >>>> > >>>> The KX3 is another Elecraft radio high on Sherwood's chart. Its > >>>> performance is excellent, especially at its price point. But its > numbers > >>>> relative to the K4 are somewhat misleading, as hinted at by Rob's > >>>> footnotes. The KX3 uses a quadrature downsampling architecture, which > >>>> digitally samples at baseband audio rather than at RF. This is ideal > for > >>> a > >>>> radio like the KX3 that has to have very low current drain for > portable > >>>> operations. The K4 uses a direct-samping architecture that requires a > >>>> higher power digital signal chain, resulting in important benefits > over > >>>> quadrature downsampling including much higher and more consistent > >>> opposite > >>>> sideband image suppression and 2nd-order intermod rejection. So the > two > >>> are > >>>> really designed for different applications. > >>>> > >>>> Overall, this first independent test of the K4 validates the > performance > >>>> of our SDR architecture. Feel free to send us any further performance > >>>> questions. > >>>> > >>>> 73, > >>>> Wayne > >>>> N6KR > >>>> > >>>> > >>>> ______________________________________________________________ > >>>> 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] > > ______________________________________________________________ > 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]
