[TowerTalk] JK 402 versus CC XM-240

[Tim Duffy]

With a good ground radial system (very important) here at K3LR - the
full size 4 square holds its own - almost 6 dB of gain over ground -
compared to a stack of W6NL Moxons (185 feet over 120 feet). The
vertical 4 square is a VERY good antenna for 40 meter DXing. 

73 

Tim K3LR

On 2019-02-26 22:54, Jeff Blaine wrote:

> Jim,
> 
> The 4sq is a great antenna but the yagi beats the 4SQ almost all the time, and often by some to a lot of s-units when it comes specifically to raw signal strength.  In some cases the difference is simply amazing.
> 
> On the other hand the yagi won't change directions instantly and it won't provide an omni direction response.  I often run with the stack on EU and then jump to the 4-sq if I get a caller that I can't make out from another direction because he's off the side or back.  I was going to take down the 4sq but the ability to point in some other direction instantly is a real help especially in contesting.
> 
> 73/jeff/ac0c
> alpha-charlie-zero-charlie
> www.ac0c.com [1]
> 
> On 27-Feb-19 11:31 AM, Jim wrote: 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 [1]
> 
> On 26-Feb-19 10:57 AM, john at 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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