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Re: [TowerTalk] JK 402 versus CC XM-240

To: towertalk@contesting.com
Subject: Re: [TowerTalk] JK 402 versus CC XM-240
From: Jim <jimw7ry@gmail.com>
Date: Tue, 26 Feb 2019 21:31:05 -0600
List-post: <mailto:towertalk@contesting.com>
WOW Jeff! There's a lot of info there! Interesting how well the 4 square works compared to the Yagi.



Thanks for posting!



Thanks
73
Jim W7RY

On 2/26/2019 7:48 PM, Jeff Blaine wrote:
Picking the "best" 40m beam is very hard on 40m and requires a compromise unless you have a big tower, a big rotor, moderate wind/ice exposure, height limitations and CW/SSB only vs. wideband CW+SSB.   Oh, and a serious budget of course.  That's why there are so many different designs in the market.

A bit of the decision process for both the beam type selection and suppler may be found here for those interested:

https://ac0c.com/main/page_acc_towersantennas_40m_stack.html

73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com

On 26-Feb-19 10:57 AM, john@kk9a.com wrote:
Momobeam makes a T element 40m beam also, I used one last year operating as PJ4R.  I have modeled a lot of 40m beams and it is hard to get a lot of gain
with a single antenna. The Moxon is a nice design but it does not defy
physics.

John KK9A



Grant Saviers KZ1W wrote:
All true, Jim.

As well, re W6NL's design of the 40m Moxon being discussed.  I built/own
two.  Also NEC4 verified.  K3LR and 8P5A use them.  The JK Moxon looks
like a close derivative.

Grant KZ1W

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