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: [email protected] [mailto:[email protected]] On Behalf Of Mel Farrer Sent: Friday, July 12, 2013 11:42 AM To: WM3M; [email protected]; 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 <[email protected]> To: [email protected]; elecraft <[email protected]> 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:[email protected] 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:[email protected] 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:[email protected] 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
