See the info at the following link. May be of interest. I have not done this
mod to my 40-2CD but I may do this in the future.
73, Stew K3ND
VE6WZ
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VE6WZ
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From: Grant Saviers <grants2@pacbell.net>
To: john@kk9a.com; towertalk@contesting.com
Sent: Wednesday, March 7, 2018 12:44 AM
Subject: Re: [TowerTalk] add a 3rd el to 40-2cd
You're probably right about coil losses. Re putting up the Moxon. It
took careful threading of all the aluminum around the mast even with a
boom lift, which is how I got mine on a HDX589 lowered. The identical
40m Moxon I built with K6KR went on his tower mast with a crane. The on
the ground footprint is 36' x 48'.
My 10m beams are on different towers. Since the Moxon tips are near 10m
resonance it could be a problem for a stacked 10m but the tips are
perpendicular to yagis aimed the same. I don't recall a feedpoint 10m
resonance but would have to check to be sure. Maybe in 5 years if there
a 10m band then :(
btw the boom on the scratch built ("120mph") version is 26.7' vs the 22'
of the Cushcraft conversions.
Grant KZ1W
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