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Re: [TowerTalk] elevated short vertical dipole orquarterwave monopole?

To: "Michael Tope" <W4EF@dellroy.com>,"Jim Lux" <jimlux@earthlink.net>,"Guy Olinger, K2AV" <olinger@bellsouth.net>,"TowerTalk" <towertalk@contesting.com>
Subject: Re: [TowerTalk] elevated short vertical dipole orquarterwave monopole?
From: "Tom Rauch" <w8ji@contesting.com>
Reply-to: Tom Rauch <w8ji@contesting.com>
Date: Fri, 3 Dec 2004 13:31:53 -0500
List-post: <mailto:towertalk@contesting.com>
> Hey, while we are on the subject, how about gamma matched
> yagis. I have a friend who swears by using a gamma match
> on his yagis with no feedline choke.

When I had a gamma matched Wilson 20M yagi, the common mode
voltage on the coax was so high the coax actually arced
between the tower leg and the coax shield. I was only using
a 4-1000A amplifier, so it isn't like I had a lot of power
either.

That's my only experience with a gamma matched Yagi.

I'd bet the whole antenna is pretty much unbalanced.

73 Tom



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