[TowerTalk] force 12 ef240s 40m yagi

[Al Williams]

Thank you for informing about the "demise" of the EF240S.

Maybe that is the reason that no one has offered to purchase my "still in 
the unopened box" EF240S which I never assembled because of purchasing the 
Steppir monstr.

Has anyone converted the EF240S to the Delta 240, please contact me.

PS, I still will sell the EF240S!
Also, still have the EF320 to sell for 80% of website price.


k7puc

----- Original Message ----- 
From: "David Gilbert" <xdavid at cis-broadband.com>
Cc: <TOWERTALK at contesting.com>
Sent: Wednesday, October 17, 2007 9:46 PM
Subject: Re: [TowerTalk] Shorty 40


>
>
> Force 12's own website says their more recent coil-loaded Delta 240 is
> intended to replace the older linear loaded EF-240S, their explanation
> being:
>
> "The most difficult aspect of the antenna was tuning the elements to the
> proper frequencies for maximum performance.  This is because the linear
> loading had variances during assembly."    see
> http://force12inc.com/F12-Delta-240-140-Info-1.htm
>
> Several reviews on eHam.net additionally report problems with the stiff
> Alum-O-Weld loading wires/**/ breaking, so I suspect that also had some
> impact on F12's decision to create the Delta 240.  In theory, the Delta
> 240 is similar to the OptiBeam OB2-40 (the choice I made as well), but
> the Delta 240 elements are a bit shorter and I'm sure the OptiBeam is
> more ruggedly built.
>
> Dave   AB7E
>
>
>
> john at kk9a.com wrote:
>> I'm not sure that linear loading is as efficient as some manufactures 
>> claim
>> and some models require a lot of adjusting of the linear loading wires 
>> for
>> the antenna to perform properly.  I personally prefer a loading coil and
>> when looking for a small 2el beam for P40A, I choose the OptiBeam OB2-40.
>> The coils are massive, the antenna is well constructed and easy to put
>> together.   My second choice (actually first choice if budget ruled out 
>> the
>> OptiBeam) would be the Cushcraft XM240.
>>
>> John KK9A
>>
>>
>>
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