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[Towertalk] Re: Sommer T25 vertical

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Subject: [Towertalk] Re: Sommer T25 vertical
From: (Tom Rauch)
Date: Tue, 2 Jul 2002 23:35:17 -0400
Hi Tom,

> >  I have a friend who lives in a tower restricted neighborhood near
> >  Houston TX and is is currently using a Butternut HF6V 10-80 (WARC
> >  is extra) vertical, but is considering changing to a Sommer Model
> >  no. T25 vertical that works on 80, 40, 30, 20, 17, 15, 12 and 10
> >  and uses no traps.  No far no one has noticed the vertical in his
> >  backyard and he has about 25-30 buried radials.
> >
> >  Anyone on the TT list used this antenna and if so how would you
> >  rate it?

A nearby ham bought one and installed it as described in the 
instruction in a clear area. He had a sub-mobile-whip-signal on 160 
meters, and wasn't much better on 80 meters.

My low dipoles, at about 50 feet absolutely blew him away on 160 and 
80, and a Hygain "no radial" vertical of mine whipped him on 40.   

He installed a base loading coil in a mast made out of that antenna, 
and picked up a very large amount on 160. As I recall, it was about 
20 dB change. On 80, it also helped a whole bunch also, but he had to 
run out and change taps.

The antenna models to have significant loss on low bands, decreasing 
to a few db loss on some higher bands compared to a vertical without 
a ground.

By the way, he installed a Butternut vertical and is quite happy with 
it despite having to add a loading coil on 160. Next time I hear him, 
I'll tell him your friend is thinking of changing a Butternut to a T-
25. I'd bet he gets excited!

73, Tom W8JI 

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