I ran into this issue with my Mosley Super 33 where it looked fine on 40m at 12' at 7.14 mhz resonance and then when I put it up in the tower it shifted up 100 kHz. Not good.
I have been able to improve resonance slightly by extending the tower all the way up to 50' but eventually I will need to rent a scissor lift and extend the elements to position 1 versus position 2 on the Mosley. Still it works great on the edge of my 150' canyon but still need to eventually take care of it. Good luck!! Keith AK6ZZ Sent from my iPhone please excuse typos On Jul 12, 2013, at 9:13 AM, "John Santillo" <u1004...@warwick.net> wrote: > The lower the frequency the harder it is and I found standing the antenna up > on end didn't work well either. > > What I do especially at the lower bands is put the antenna up in the air > around 10 to 12 feet and adjust it to just below the bottom of the band. > For example for 40M I would tune for best VSWR at 6.95MHz. Then when the > antenna was raised the resonant point moved up in frequency to 7.1MHz. I > know it's not the best way but it worked. > > > 73, > > John > N2HMM > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mel Farrer > Sent: Friday, July 12, 2013 11:42 AM > To: WM3M; mcduf...@garymcduffie.com; elecraft > Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ? > > I used a 12 foot tall four leg scissor ladder. Close but no cigars. The > lower bands will probably show the higher SWR, and a lower shift in freq > response. As long as the pass band is close it will probably be OK. > > Mel, K6KBE > > > > > ________________________________ > From: WM3M <w...@live.com> > To: mcduf...@garymcduffie.com; elecraft <elecraft@mailman.qth.net> > Sent: Friday, July 12, 2013 8:09 AM > Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ? > > > What I have done is clamp it to my wooden deck railings on a 8 foot mast, > the higher your deck is the better. > That worked pretty well for me, little change once it was up in position. > 73 good luck > Emory WM3M > > -----Original Message----- > From: AG0N-3055 > Sent: Friday, July 12, 2013 10:58 AM > To: elecraft > Subject: Re: [Elecraft] Off Topic -- Yagi Antenna SWR measurement ? > > On Fri, 12 Jul 2013 07:50:43 -0700, Phil Hystad wrote: > >> Question: is this accurate or does the proximity of ground (maybe two >> feet high) >> so strongly affect the SWR reading that the measurement is not accurate. > > Not accurate at all. Most manufacturers say to stand the beam up so it > is pointed straight up into the sky, reflector down, to do such checks. > I still don't trust that, but is better than having it parallel to the > ground. Keep everything (including yourself) away from the elements > during the test. Get it out in a clear yard, as far from wires and > buildings as possible and point it into the sky. > > Gary > -- > http://ag0n.net > 3055: http://ag0n.net/irlp/3055 > NodeOp Help Page: http://ag0n.net/irlp > ______________________________________________________________ > 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 > > ______________________________________________________________ > 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
