It is surprising that the manufacture is unable to answer this question.
Many years ago had a Force12 Magnum dipole element side mounted on a tower
in Aruba and I adjusted the element tips for best SWR. The element tip
lengths that I used surprisingly were much different from the manual. Yes
they were riveted and I had to drill new holes. I am not sure if this was
the proper tuning procedure however it worked pretty well and it was not
difficult to do. The dipole was later replaced with an OptiBeam OB2-40.
John KK9A
To:<towertalk@contesting.com>
Subject:[TowerTalk] F-12 340N question
From:"Jim Thomson" <jim.thom@telus.net>
Date:Sat, 8 Jun 2013 06:33:26 -0700
List-post:<towertalk@contesting.com">mailto:towertalk@contesting.com>
I have a F-12 340N. Manual claims you can shift the ele resonance points
by adjusting the eles. 6 inchs per side = 100 khz.
Now do they mean tweak the .375 inch tips.... OR do they mean tweak the
adjustable linear loading rods ???? The tips are riveted.
It would make a lot more sense to tweak the LL rods..and leave the tips
alone.
Makes more sense to me to make the ele max length
and use LESS LL if you want to move the freq up higher in the band.
Does anybody have experience with this..or know the answer ? The new owner
of
F12 doesn't know either.
tnx in advance.......... Jim VE7RF
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