John,
You 100% correct ,,, the dampening is required because of taper design,
As I said in one of my past posts,,,,, The Hi Gain 155 design with out
dampening rope , wit ha slight breeze will vibrate like a tuning fork ..
YMMV
Wayne W3EA
________________________________
From: TowerTalk <[email protected]> on behalf of [email protected]
<[email protected]>
Sent: Thursday, June 22, 2017 3:04 PM
To: [email protected]
Subject: Re: [TowerTalk] HyGain 155CA dampening rope
I think rope is just a patch for a poorly designed element.
John KK9A
To: Towertalk Reflector <[email protected]>
Subject: Re: [TowerTalk] HyGain 155CA dampening rope
From: GALE STEWARD via TowerTalk <[email protected]>
Reply-to: GALE STEWARD <[email protected]>
Date: Thu, 22 Jun 2017 18:28:33 +0000 (UTC)
Some years ago, Dick Weber, K5IU did some work on this issue and I believe
that
he wrote an article that was published in CQ (or maybe QST).
I haven't found it online but I didn't do a lot of digging.
Dave Leeson, W6NL, talked about element vibration damping techniques in his
book "Physical Design of Yagi Antennas", page 4-39.
73, Stew K3ND
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