[TowerTalk] Shorty 40

[David Gilbert]

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
>
>
>