[Antennas] Shaking Antenna

Mon Sep 19 21:05:35 EDT 2005

Anything that changes the mass of the elements will impact the air resonance 
(e.g. vibration) of the elements. Rope, cable, hose, etc. works good.
Sincerely,
Dr. William J. Schmidt, II K9HZ
Trustee of the North American QRO - Central Division Club - K9ZC
Email: bill at wjschmidt.com
WebPage: www.wjschmidt.com
"If computers get too powerful, we can organize them into a committee; that 
will do them in." -- Bradley's Bromide
----- Original Message ----- 
From: "David Robbins" <k1ttt at arrl.net>
To: <antennas at mailman.qth.net>
Sent: Monday, September 19, 2005 7:13 PM
Subject: RE: [Antennas] Shaking Antenna
Sounds like you have a cushcraft 5 element 6m Yagi. I am trying to damp one
now with aircraft cable in the elements, seems to be working so far but I'll
have to wait a year or so to see if an element fatigues apart like the last
one did.
David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net [mailto:antennas-
> bounces at mailman.qth.net] On Behalf Of James Boyd
> Sent: Monday, September 19, 2005 23:57
> To: antennas at mailman.qth.net
> Subject: [Antennas] Shaking Antenna
>> Dear Group,
> I've got a small 5 element 6-meter beam that shakes,
> or vibrates like no bodies business. Even when the
> wind is not blowing, this crazy thing will just dance
> like I've never seen before. It's so bad, that, I
> lost some pieces off of the stupid antenna while it
> was on my tower. Here is the question: Has anybody
> ever had this problem, and if so, what did you do
> about it.
>> Thank you,
> Jim
> KB9VTM
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