Topband
[Top] [All Lists]

Re: Topband: Shunt Feed - Insulated Elements on Yagi

To: "topband@contesting.com" <topband@contesting.com>, Joel Harrison <w5zn@w5zn.org>
Subject: Re: Topband: Shunt Feed - Insulated Elements on Yagi
From: k1fz@myfairpoint.net
Reply-to: k1fz@myfairpoint.net
Date: Thu, 18 Dec 2014 11:33:25 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
One of the factors for arc over is the diameter of the tower and top support pipe diameter & length. A really FAT 1/4 wave tower may have 1000 ohms at the top, while a skinny tower would have much more. The higher the impedance, the higher the voltage to cause arc overs. 73
 Bruce-K1FZ 
 www.qsl.net/k1fz/beveragenotes.html

On Thu, 18 Dec 2014 10:05:16 -0600, Joel Harrison <w5zn@w5zn.org> wrote:
Stan - For about 8 years, up until this past spring, my shunt fed tower
 > for 160 had a KT34XA (insulated elements, later upgraded to a KT36XA same
 > insulated elements) at the top and I never experienced any issue at all
 > running 1500 watts, even during a few contests where, as you know, you are
 > running "continuous" for an extended period. I've read discussion about
 > whether the coax should run inside -vs- outside the tower, mine ran
> outside. >

> Thanks...Stan, K5GO
 > > _________________
 > > Topband Reflector Archives - http://www.contesting.com/_topband
 > >
 >
 >
 > www.w5zn.org
 >

  
  

_________________
Topband Reflector Archives - http://www.contesting.com/_topband
<Prev in Thread] Current Thread [Next in Thread>