[TenTec] Re. [Ten Tec] --- and balanced fed verticals

[Rick - DJ0IP / NJ0IP]

James,

Last year Rolf, DL7VEE wrote an article for one of our local ham mags
describing his experience using a multi-band "Triple Leg" on DX-peditions.
This is similar to what you are thinking about doing.

A "Triple Leg" is a fancy name for an elevated ground plane, generally with
the three radials (legs) sloping at 45 degrees.  This is one leg more than
what you are considering.

Rolf made his completely of wire, mounted on a fiberglass telescoping pole,
and fed it with openwire.
He got excellent results on several bands.

Bottom line, I think it is an excellent idea and worth trying out.

I will try to find the mag and send you some information on this.
(it's in German of course)

73
Rick, DJ0IP

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Richards
Sent: Friday, January 27, 2012 8:01 AM
To: k9yc at arrl.net; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Re. [Ten Tec] --- and balanced fed verticals

Reason I ask is that I have been considering an off center fed 15 meter 
vertical, with two radials, at about 45 degrees off vertical, with the 
"base" or center feed point, set about 20 feet up.   Vertical element 21 
feet, radials 8 feet long.

There is a guy who makes these commercially, but feeds them with coax 
and a 4:1 balun.

http://n6bt.com/n6bt-Bravo-1-BR-mono-sbva-1.htm

The notion of feeding at 300-400 ohm antenna with 450 ohm open line was 
beginning to get interesting.

I have been experimenting with various feed-points on flat-top OCF 
antennas, and have enjoyed a detailed discussion of same with Rick 
DJ0IP.   The notion of an OCF vertical dipole fed with open line is 
intriguing.   450 ohm window line... Hmmmm...


================   James - K8JHR  ==============================


On 1/26/2012 11:44 PM, Jim Brown wrote:
> On 1/26/2012 7:44 PM, Richards wrote:
>> What about a vertical dipole ?
>
> If it is in close proximity to the earth, it is unbalanced.  Close in
> this context means as a fraction of a wavelength.
>
> 73, Jim K9YC
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