Have wave antenna for 20 meters Band

[a71br]

Have wave antenna for 20 meters Band

get clean and large photo here http://www.qsl.net/a71a/half%20wave%20antenna%2014%20Mhz.bmp

[A71BX]

Thanks OM Abdulrahman for the design of the half wave 20m antenna

Can you post something about this antenna

SWR?!

What are the advantages & disadvantages?!

Did you get any DX stations with this dipole?

73's

[a71br]

Hi ali I never heard the frequency cleared only with this type of antenna. and we DX stations with this dipole.

http://www.qsl.net/a71a/half%20wave%20antenna%2014%20Mhz.bmp

[vu3muv]

Hi Ali,
This antenna is called Zepp antenna. We had gr8 time with this antenna. We compare other antenna with this one while testing at A71BR's shack. The quater wave matching section is basically a 450 Oms (or may be 200 ohms) ribbon cable shorted in the bottom. You have take tap at various usually within 2 feet from the bottom to get the best swr match for the center of the band and you can start working . Pretty simple. Incase you can find this ribbon cable , you can use 16 Amp house hold electrical wire , cut half wave length and double it back with some sort of spacers of 5 to 7 cm width like A71BR mentioned and it to works. Infact A71BR made all other band antennas using this design and they all work fairly well. This antenna will cost less tha Qr100 to fabricate.

73s
murali

[vu3muv]

Dear All,
In my quest for good antennas , I recently stumbled upon a antenna similar to G5RV but different principle/s , the mystery behind this antenna as the name suggests is due to the fact that many experts tried to computer model this antenna to find out why and how does this antenna work so well and every one of them got different results and so the name. Below given is the link to the original article and its inventor.

http://www.w5gi.com/mysteryantenna.htm

Reviews are here: http://www.eham.net/reviews/detail/4552


Hope you will have fun building the same and share your experience with us. If time permits and am able to get the metrials locally, will try hands on the same too.

http://www.w5gi.com/images/w5gimsteryantennaschematic.gif http://www.w5gi.com/images/w5gimsteryantenna.jpg

Best 73s
Murali
A7/VU3MUV

[4Z1UF]

http://www.mydarc.de/dk7zb/J_Pole/wiremanjpole.htm