The reason that the 80/40/15 combo does not work well is that the 40 resonates pretty well on 15 because it is 3/4 wave. I have had a lot of difficulty with 80/40/20 and have never had one work well. My current fan is an Alpha-Delta 80/40 with a 75 meter wire fanned. It is the magic formula to use the same antenna for 80 CW and 75 Phone. It also works well with a tuner on 15 and nicely on 40. I have the apex at 44 feet and the fan about 20 degrees. It does not work well on 20 and 10 or the WARC bands. Willis 'Cookie' Cooke, TDXS DX Chairman K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart
On Sunday, September 14, 2014 12:41 AM, Don Wilhelm <w3...@embarqmail.com> wrote: I failed to mention another point with regard to fan dipoles. Do not mix 3rd harmonic radiators on the same coax. In other words, stay away from combinations of 40 meters and 15 meters, and also 40 meters and 30 meters. They may work, but tuning problems are 'iffy'. 73, Don W3FPR On 9/14/2014 1:08 AM, Jim Brown wrote: > On Sat,9/13/2014 5:01 PM, Don Wilhelm wrote: >> One other comment regarding fan dipoles. >> They really work well, but if one attempts to put more than 3 bands >> on a fan dipole, the interaction can become frustrating to tune them >> all, been there, done that, and have all the scars. > > Strongly agree. Also, fans work best on harmonically related bands. > 80/40 works very well, so does 20/15/10. 40/30/20 not so good. > > I use separations of about 9 inches for 20/15/10, and about 15 inches > for 80/40. > ______________________________________________________________ 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 wrco...@yahoo.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
