I have recently been using the 6m ARR GaAsFET Preamp ahead of my K3S. I also find that it has lower noise and perhaps more gain. The proof is that I have been able to work moonrise/moonset EME with it (no elevation on my antenna).
John WA1EAZ > On Apr 6, 2018, at 11:16 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > > On 4/6/2018 5:58 PM, j...@kk9a.com wrote: >> I have operated from several countries using my K3S and I am never so >> fortunate to have a noise floor low enough use preamp 2. Most of the time >> preamp 1 is also off. > > I've had the opposite experience. MDS of the original K3 was woefully poor > above 15M, even with the preamp switched in. As luck would have it, I have a > very nice ARR GAsFET 6M preamp on the shelf that I'd used in Chicago that I > inserted at the RX antenna patch point; I found that it improved the MDS all > the way down to 12M. I would have missed a LOT of QSOs without that preamp. > Of course, like everyone else, sometimes my noise level is lower than at > other times, and a solar system 500 ft from my main antenna raises it by 10 > dB on 10 and 6 when the sun is hitting it. > > When the K3S was introduced, I quickly replaced the Synth boards and the > Transverter board to get that improved preamp, simplifying my RX antenna > switching. I do find, though, that the GAsFET preamp has a slightly lower NF, > so I continue to use it during the 6M season. > > 73, Jim K9YC > > ______________________________________________________________ > 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 jstengrev...@comcast.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
