Well, misery loves company. Thanks for the feedback.I plan on calling M2 on
Monday but was hoping to finish this project this weekend. 2m tower still needs
attention. Hope to work you in January. Btw...is the Orlando hamfest canceled?
Met you last year. Nice VHF dicussion.Thanks,Paul Rollinson, KE1LI Rollinson
Associates860-928-5147860-208-8814 Cell/TextPaulrollinson@sbcglobal.net
Representing Component Part Manufacturers for over 35 yearsSent from my
Verizon, Samsung Galaxy smartphone
-------- Original message --------From: Buddy Morgan via VHFcontesting
<vhfcontesting@contesting.com> Date: 1/2/21 9:20 AM (GMT-05:00) To:
vhfcontesting@contesting.com Subject: Re: [VHFcontesting] Tech Help needed
Can't really offer you much help. But, about six months ago, I did what you are
trying to do with my Five element M2. I did it without adjusting element
lengths. (I agree, moving the shorting bars out, goes against the grain) Yes,
the antenna is really made to operate in the low end of the band. Here is the
best I could do:50.080 1:150.125 1:150.200 1.1:150.318
1.3:1Before re-tuning I think I was close to 2:1 @50.318. Doubt if this
helps you. But, maybe it will spur on an M2 Five Element owner or two.Buddy
WB4OMG -----Original Message-----From: Paul Rollinson
<Paulrollinson@sbcglobal.net>To: 'VHF Contesting Reflector'
<vhfcontesting@contesting.com>Sent: Sat, Jan 2, 2021 9:01 amSubject:
[VHFcontesting] Tech Help neededGood morning all, I hope you had a nice
holiday. Part of prepping for the January contest included taking down the
stack ofM26M7antennas and tuning them a bit higher to accommodate FT8/4
frequencieswhere the swr runs close to 2:1 After several hours of tweaking we
were unsuccessful in elevating thefrequencies. Moving the shorting bars had
little effect and the elements arecrimped together so shortening them would be
permanent; I prefer not to dothis. After diving thru the specs, the antennas
are 6M7 and not the modernversions 6M7JHV. Below is a link to the
manual.https://dl-mail.ymail.com/ws/download/mailboxes/@.id==VjN-j4MNikUvGG6dI72pGtFnbtnm78WZEHQ84kCP5dKOEa_RWizZIRV1VtWw7y3GBuOyPtJBEyjJRlraKdU25EkUFw/messages/@.id==AOqprj4WDiqnX--apQiykLPEILk/content/parts/@.id==2/raw?appid=YMailNorrin<https://dl-mail.ymail.com/ws/download/mailboxes/@.id==VjN-j4MNikUvGG6dI72pGtFnbtnm78WZEHQ84kCP5dKOEa_RWizZIRV1VtWw7y3GBuOyPtJBEyjJRlraKdU25EkUFw/messages/@.id==AOqprj4WDiqnX--apQiykLPEILk/content/parts/@.id==2/raw?appid=YMailNorrin&ymreqid=117033b5-9242-646b-1c92-e7000301a500&token=zitEzqOML3j84e6ealFTT5U7-km5qEQF52lp7AcCuBZYNpCJiKFonMipX0nRikauD7BKLkpZAtQ_aN6eUBTbi2UcMC60Zo-ifhoLye8kBZhFaDq07_sCfvo7gxJ36C_A>&ymreqid=117033b5-9242-646b-1c92-e7000301a500&token=zitEzqOML3j84e6ealFTT5U7-km5qEQF52lp7AcCuBZYNpCJiKFonMipX0nRikauD7BKLkpZAtQ_aN6eUBTbi2UcMC60Zo-ifhoLye8kBZhFaDq07_sCfvo7gxJ36C_A
I'm looking for advice. The manual states that moving the shoring bars
outwill increase the tuned frequency (which doesn't make sense to me). If
thisis true, I may experiment with either adding push on rings to act
ascapacitance hats, electrically lengthening the t match, or swedge on
lengthsof rod to extend the t matches. The design freq of the antenna is very
sharp: 49.5 to 50.5MHZ but I can'tseem to stay within 2:1 at 50.315. Running 1
kw is an issue for the amp. The other, not preferred option is to run a short
segment of 70 ohm coax asa transformer but I will lose output/receive in the
form of heat. We hung the antennas about 10 ft in the air to sweep so the
numbers arefairly accurate. Any help or suggestions would be appreciated.
Thanks, Paul Rollinson, KE1LIFN41AU860-928-5147860-208-8814 Cell/Text
<mailto:Paulrollinson@sbcglobal.net> Paulrollinson@sbcglobal.net
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