[TowerTalk] 2 el 40m beams

[W0MU Mike Fatchett]

I have a number of Cushcraft 40's 1 40-2CD that was up for about 20 
years on top of a 70ft tower in Colorado on top of a hill.  I pinned the 
elements and cap hats but it was in one piece when it came down last 
year.  They improved the survivability of the XM240 with some inserts 
etc.  I have one in Montana at 65 ft and one in Colorado at about 85 
ft.  Both are still up.  Once again I pinned the elements and cap hats.  
Still up and in good shape.  The Montana version sits in the wind almost 
constantly and has survived 80mph winds on a number of occasions.  The 
only regret I have on the Montana XM240 is that I did not ground the 
reflector and when a T-storm approaches you can hear and sometimes see 
the static discharging from the element tot he mounting bracket and it 
creates a heck of a lot of noise on the radio!

The Montana stuff is being taken down and moved to Colorado this 
summer.  I will probably turn one of the 40's into a moxon.

Mike W0MU

W0MU-1 CC Cluster w0mu.net:23 or w0mu-1.dnsdynamic.com
Http://www.w0mu.com


On 5/25/2012 8:55 AM, GALE STEWARD wrote:
> I've have had very good luck with a reinforced Cushcraft 40-2CD. This antenna was reinforced as per the W6NL mods and has survived ice, heavy wet snow, and high winds. The newer model CC XM-240 can be strengthened in the same way. 
>
> http://k7vc.com/402cd.html
>
>
> Mine is at 72ft so yours would see a bit weather related stress at 100ft.
>
> Also, if you want full length elements, ON4UN's 3 element 40M yagi looks very strong. With a bit of computer modeling, you could re-configure it as a 2 element antenna. John's elements&  boom are very robust.
>
> GL with the project.
>
> 73, Stew K3ND
>
>
>
> ________________________________
>   From: "lkeller73 at roadrunner.com"<lkeller73 at roadrunner.com>
> To: towertalk at contesting.com
> Sent: Thursday, May 24, 2012 9:51 AM
> Subject: [TowerTalk] 2 el 40m beams
>
> Hello out there.
>
> I'm at a loss as to what to replace a snow-damaged 2 el 40m beam with.
>
> Everything I've found on-line doesn't really call out how strong the antenna is.
>
> Ideally, since most "gain" figures would be nebulous anyway, I want the STRONGEST beam
> out there since it's going on Bertha at 100 feet.
>
> Any suggestions?
>
> Lonnie
> WA2AOG/W2RR
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