I was thinking of a similar remote setup, wondering which remote autotuner is recommended? Thanks, Frank w4tg
On Feb 13, 2018 8:56 AM, "Chris Hallinan" <challi...@gmail.com> wrote: > I have a very similar setup. K3 -> KPA500 -> MFJ 994BRT 600W autotuner > mounted remote -> Balun Designs 4:1 -> 600 Ohm open wire line to 80 m > doublet. > > It works fantastic on 80-20, but will not tune better than about 2:1 on > 17. I cannot use the KPA500 on 17 because the SWR is too high. Nothing > I've tried works. I'm wondering if it is simply the tuning > range/resolution of the MFJ-994BRT? I like the idea of remote mounting, as > I have only a couple feet of coax between the tuner and the balun, thus > minimizing SWR-related feedline loss. > > Any suggestions for how to get it to tune on 17? > > 73 > Chris - K1AY > Punta Gorda, FL > > > On Mon, Feb 12, 2018 at 12:16 PM, John W2XS <jm...@optonline.net> wrote: > > > I replaced my Johnson Matchbox with a Balun Designs tuner balun. The > > biggest > > benefit is that the K3 ATU remembers the settings from band to band so > the > > QSY is very rapid. I love watching the DX spots come rolling through on > my > > N3FJP logging program and clicking on them to QSY to that frequency and > not > > have to tune up again. I use it on 80 through 6 meters with an 80m > doublet > > fed with KW ladder line (300 ohm). > > > > My recommendation is to keep the piece of coax from the balun to the rig > as > > short as possible. This is to minimize loss since that line will most > > likely be highly mis-matched on most bands. There was a QST article not > > that > > long ago which detailed the losses in that situation and I was surprised > at > > how high they were. > > > > I once had an MFJ balanced RF Ammeter and made measurements of the JMB > vs. > > the balun and they compared favorably. DJ0IP (referenced earlier) has > > kindly put those measurements on his website. (This is in the FWIW > > category!) > > > > I have not tried to substitute the tuner balun with another type but that > > might be a future experiment. > > > > 73, John W2XS > > > > > > > > -- > > Sent from: http://elecraft.365791.n2.nabble.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 challi...@gmail.com > > > > > > -- > Life is like Linux - it never stands still. > ______________________________________________________________ > 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 fst...@ieee.org > ______________________________________________________________ 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
