Nearly all of the all-metal yagis I've seen have the elements mounted on top of the boom. I wonder why? If they were mounted under the boom, gravity would be working to keep the boom in place instead
Author: "K8RI on TowerTalk" <K8RI-on-TowerTalk@tm.net>
Date: Wed, 22 Nov 2006 23:11:34 -0500
"I think" which means I really don't know, that were the element on the under side only the screws would be supporting it rather than the boom and boom to element clamp. OTOH (I've ssen these) given
Go outside and look up at your Force-12 Yagis. The elements all are hung below the boom. 73, George T. Daughters, K6GT _______________________________________________ ________________________________
Maybe because someone - like Telrex, perhaps - started out doing them that way, and everyone else followed. Force12 has always had all of theirs under the boom, and most new designs seem to follow th
Telrex used the 3rd option... through the boom. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net ______________________
Oh well - Gotham, maybe? 73, Pete N4ZR _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.con
Maybe because someone - like Telrex, perhaps - started out doing them that way, and everyone else followed ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Not exactly a company know
Author: "Bob Newton W5RN" <rj.newton.w5rn@verizon.net>
Date: Thu, 23 Nov 2006 12:51:22 -0800
And Cushcraft had the ATB-34 (the predecessor to the A-3 and A-4) in 1976 or 1977 with the elements under the boom. Bob W5RN _______________________________________________ __________________________
If I remember my Statics & Dynamics correctly, the gravitational forces on a horizontal element(and the resulting torque on the boom) are the same whether it's mounted above or below the boom. For a
ORIGINAL MESSAGE: -- REPLY FOLLOWS -- That is true as long as the elements above the boom are perfectly centered above the boom, but when there is wind or other twisting force applied, then gravity b
Author: "J. Gordon Beattie, Jr., W2TTT" <w2ttt@att.net>
Date: Thu, 23 Nov 2006 22:17:46 -0500
Ted, I agree! Drainage of the elements, maximizing ice melt and ease of maintenance would be my driving factors here in New Jersey. Happy Thanksgiving & 73, Gordon Beattie, W2TTT 201.314.6964 If I re
Ted, that is only correct if and while the element is perfectly horizontal above the boom and perfectly centered on it. As soon as the element tips away from horizontal, the center of gravity of the
Author: "J. Gordon Beattie, Jr., W2TTT" <w2ttt@att.net>
Date: Thu, 23 Nov 2006 23:23:31 -0500
Pete, Don't you think that there would be better melting of ice on top? Also, any U-bolts should be "U" up so that water clears off first and minimizes corrosion. Enjoy! 73, Gordon, W2TTT W2ttt@att.n
Happy after eating too much turkey day ... After having spent all that money, time, and effort on raising the tower as high as possible, mast, all that, I put the elements on TOP ... why would I give
on top of the boom. I wonder why? the boom in place instead of constantly trying to turn the boom over. This is such a common design I'm wondering what am I missing? Umm, locked into "conventional wi