Mike and All, I'm not all that surprised that W5OV was able to get a match using his K3, although I'm not sure exactly how severe the mismatch is. It has to be pretty far off though.
Using my K3, with its built-in ATU, I am able to get a 1:1 match on 80 meters using my R8 vertical, which isn't supposed to go lower than 40 meters. I can also get a match that is better than 2:1 on 160. Obviously though, the efficiency of this antenna on those bands is pretty lousy. I really don't operate on 160, except I did work VP6DX on both SSB and CW with this arrangement. Their beverages did all the work though I'm sure. Nevertheless, the K3's ATU is very good! I haven't tried the same test with my K2 and it's built-in ATU, but that tuner is very good also. I just don't know if it's quite as good as the K3's. The ATU in my Orion II will also match the R8 on 80 meters, but just about every other rig I own, or have owned, with a built in ATU, would not come close to doing this. I have a Kenwood TS-480 and a Yaesu FT-1000 Mark V, neither of which could do that. The Mark V won't even allow me to cover all of 40 meters, but the K3 does it with ease. Having said all of this, I'd be very cautious about big excursions with the K3 or K2 built-in ATU's. I'd sure turn the power down a lot before even trying. Clearly though, not all built-in ATU's are equal! Dave W7AQK ----- Original Message ----- From: "W0MU Mike Fatchett" <w...@w0mu.com> To: "'James Apple'" <wb1...@gmail.com>; <Elecraft@mailman.qth.net> Sent: Sunday, March 15, 2009 9:16 AM Subject: Re: [Elecraft] 43' Vertical and the K2 tuner > We just had a heated exchange about these antennas on another reflector. > > Keep in mind that it is a compromise antenna. 43 feet is really not > magical > to any band that I know of. You still need a good radial system etc. > >>From what I have read the tuner at the base would be much more efficient >>and > use a good quality coax. > > I would be curious to see how a BigIR or even a Hy-tower compared to the > 43 > ft verticals. > > I was surprised to read that W5OV was able to match it with the K3 tuner. > I > think that speaks volumes for the tuner in the K3. I will have to play > with > my tuner a bit more. Most of my antennas have good swr except for the 40m > beam in the extreme lower cw sections and the K3 tunes this fine but we > are > talking about 2 to 2.5 to 1 max, not 100:1 > > > > > "A slip of the foot you may soon recover, but a slip of the tongue you may > never get over." Ben Franklin > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of James Apple > Sent: Sunday, March 15, 2009 7:27 AM > To: Elecraft@mailman.qth.net > Subject: [Elecraft] 43' Vertical and the K2 tuner > > After the ice storm of 2009, I'm looking for an new antenna. I've been > considering the 43' verticals by DXE,HyGain and MFJ. But I'm not sure if > my > K2 tuner will have the range needed. The DXE site has a warning about > internal tuners. Anyone using a K2 and a 43' vertical ? > how's it play ? > > Thanks in Advance > > - Jim (WB1DOG) > ______________________________________________________________ > 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 > > ______________________________________________________________ > 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 ______________________________________________________________ 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
