Thanks everyone! Good advice. Now that I have better Internet access again (btw I meant "RF" not "Rd" in the subject line, of course), I discovered this article on ... elecraft.com : http://www.elecraft.com/Apps/eliminating_tx_rf_feedback_probl.htm :-)
I will experiment with less random lengths for my random wires, and better counterpoises, and a small balun if necessary. 73 de ed w6ela On Sun, May 29, 2016 at 2:05 PM, Wayne Burdick <n...@elecraft.com> wrote: > Also try a QRP balun at the radio, such as our BL1 or BL2. > > 73, > Wayne > N6KR > > > On May 28, 2016, at 8:43 PM, Don Wilhelm <donw...@embarqmail.com> wrote: > > > Ed, > > > > Yes, that can be common with long wire antennas - that can happen with > any transceiver, it is not unique to the K3 or KX3. > > > > Change the length of your long wire by 1/8 wavelength at the frequency > you are having trouble with. > > > > The situation is that you have a high RF voltage on that antenna near > the shack end. > > Even though the tuner can match it, it can produce a strong RF Field in > the shack. > > > > 73, > > Don W3FPR > > > > On 5/28/2016 11:17 PM, Edouard Lafargue wrote: > >> I was operating portable today, with a long wire in a tree and > >> counterpoise on the ground, and no matter what I did, every time I > pushed > >> the mic button, I got super strong RF feedback in audio monitoring, > >> apparently picked up by the MH3 cable - things got slightly better if I > >> tried to bunch/coil the MH3 cable. Is this common? > >> > >> I only managed to work one station in Indiana in the time I tried, most > of > >> the time what I heard in my headphones while transmitting was > >> unintelligible garble, so it is no surprise others didn't hear me, I > >> guess... > >> > >> My KX3 has got an internal ATU and it managed to match the long wire > >> perfectly at each frequency I tried to operate... > >> > >> > > > > ______________________________________________________________ > > 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 n...@elecraft.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 arch...@mail-archive.com
