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[TowerTalk] Cushcraft 40-2CD on 12, 17 & 6m

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Subject: [TowerTalk] Cushcraft 40-2CD on 12, 17 & 6m
Date: Tue, 30 Jun 1998 20:14:41 -0600
The 40-2CD presents a reasonable match on 17M (<2:1 SWR) 
and seems to work as an effective  rotary dipole on that band. 
The SWR on 12M is higher but can be tuned with most antenna
tuners.  I know many people who use this as their primary 17M
antenna and a few who also use it on 12M.  It should be possible
to add a close spaced 12M parasleeve driven element if you want 
to achieve low 12M SWR without a tuner.

It would be a simple matter to add 12 and 17 meter reflectors
(or a trapped reflector a la  A3WS) to achieve 2 effective elements
on each band.  The fact that there are no elements in front of the
driven element means that there will be NO destructive interference
as experienced with 3 or more elements on lower bands.   These 
additional elements for the WARC bands will NOT affect 40M

I have often thought such an option would make an interesting 
product enhancement for Cushcraft.

73 / GL,  Tom  N4KG

On Tue, 30 Jun 1998 19:08:47 -0400 "DavidC" <> writes:
>Over the past week several folks have told me that the 40-2CD tunes up
>nicely and runs real well on 12 and 17, and that according to an 
>shows a good swr and impedance on 6m (multiple wavelengths I guess!).
>I would greatly value reports of actual experiences with this antenna 
>these non-design frequencies as I move closer to finalizing my antenna
>These are all secondary bands for me and if this beam will handle them 
>will be able to settle on it as adequate for those bands and return my
>focus to maximizing 10-15-20.
>This is a wonderful reflector, made so by all herein who love the 
>hobby and
>enjoy the sharing of knowledge and experience!   Thanks & 73, DavidC  
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