ANTENTOP- 01- 2008, # 010

Water Pipe T-Joint at VHF Antennas

By the way, I was (and may be am) not an experienced VHF- man before I decided to do my VHF YAGI. I had serous doubt that I spoiled lots stuff while I made my YAGI. So I found for solution how to do the antenna without turning in garbage my antenna's material. When I went around a house-ware store I have seen polystyrene water pipe T-joint. Picture 1 shows the T- joint.

Picture 1

By: N. Filenko, UA9XBI ua9xbi@online.ru

Credit Line: www.cqham.ru

UA9XBI

Radio club "Arktika" Championship 2004

Photo Credit Line:

http://www.arktika.komi.com/Champ_2004.htm

I have bought some these ones. While making the VHF antenna several of T-joints spoiled were spoiled but other ones worked well in my design. Picture 2 shows T- joint installed at my antenna.

The design has some benefits:

1. Antenna elements are isolated from traverse with gap in 6-10 mm

2. It is possible to move the antenna elements along the traverse.

3. It is possible to play with antenna design- change length between antennas elements and easy to change the elements

Picture 2

http://www.antentop.org/

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