[TowerTalk] Force 12 Delta 240 2 Elem 40M Yagi

john at kk9a.com john at kk9a.com
Sun Apr 13 15:54:03 EDT 2014

I concur with Dave's post.  A high-Q loading coil is the best way to shorten
a 40m element. The OptiBeam has a massive high-Q loading coil and the
antenna performance is excellent. The OB2-40 is well made, no strengthening
modifications are needed, and it is easy to assemble and adjust for

John KK9A / P40A

To:	towertalk at contesting.com
Subject:	 Re: [TowerTalk] Force 12 Delta 240 2 Elem 40M Yagi
From:	 David Gilbert <xdavid at cis-broadband.com>
Date:	 Sat, 12 Apr 2014 21:03:11 -0700
List-post:	 <towertalk at contesting.com">mailto:towertalk at contesting.com>

I do believe that the coil loaded Shorty 40's (F12 or other) are a much
better choice than the linear loaded versions. I think that W8JI wrote a
piece on that once ... maybe it's even on his website. I have the Optibeam
OB2-40, which is a coil loaded Shorty 40 similar to the F12 antenna except
much sturdier, and it works great (yes, I've measured the pattern).

Dave   AB7E

On 4/12/2014 1:24 PM, K7LXC at aol.com wrote:
  Does anyone have a Force 12 Delta 240 up in the air in  use? If so, how
does it play?
I've installed a number of the F12 linear loaded antennas and NO ONE
has ever said to me that it was a 'great' antenna.  I've always thought that
the CC 2L shorty forty is the best bang for the buck on  40M. Maybe the
newer F12 versions with coils would be an  improvement.
Steve    K7LXC
Professional tower services for amateurs

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