[TowerTalk] F-12 340N question

[Larry]

Re-drilling and moving the element was the procedure. I had an early C3, 
EF180B, and EF240X and I had to re-do nearly every element. In my case the 
initial holes were different on nearly every element so I did the 
re-drilling after consultation with F12.

73, Larry  W6NWS

-----Original Message----- 
From: john at kk9a.com
Sent: Saturday, June 08, 2013 10:28 AM
To: TOWERTALK at contesting.com
Subject: Re: [TowerTalk] F-12 340N question

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 at contesting.com>
Subject:[TowerTalk] F-12 340N question
From:"Jim Thomson" <jim.thom at telus.net>
Date:Sat, 8 Jun 2013 06:33:26 -0700
List-post:<towertalk at contesting.com">mailto:towertalk at 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

_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk