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May 8th 14, 01:00 AM
posted to rec.radio.amateur.antenna
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80m/40m fullwave resp. 2*fullwave horiz. loop
On Friday, August 9, 1996 5:00:00 PM UTC+10, Kebsch wrote:
Hi, I am looking for a simple wire antenna for the 80m band (and for 40m also), which will cover a range (radius) of about approx. 300 miles and has a more or less 360 degrees radiation pattern. Also I have not very much time for testing (a few hours only). Any good idea? If I would hang up a full wave lenght horizontal loop for the 80m band, which will be a 2 wave lenght horizontzal loop for the 40m band, approx. 25ft (8m) over the ground only, some questions will rise up .. a) would you expect a more or less 360 degrees radiation pattern, because the loop is hanging at 1/10 resp. 1/5 of lambda about the ground (a more or less "wet" meadow)? b) which normal/typical working range (radius) would you expect during the day 80m/40m? 100, 200, 300 or more miles? c) which impedance would you expect at (80m/40m)? d) which type of feeding line and matching method would you recommend? e) any further comments and recommendations? f) should I simply forget this idea? :-) Please respond via e-mail (direct) and many thanks for your help in advance. 73 de Waldemar, DK3VN -- E-Mail: .. or .. Packet Radio: DK3VN @ DB0NOS.#NRW.DEU.EU Big antennas, high in the sky, are better than small ones, low! [bah] I use a full wave loop (Square) on 80/75m here in Australia and feed it in the corner with 75ohm coax, it's resonant on 3.770 with a 1:1 SWR, but I tune it slightly when I operate up or down the band. I have had a lot of success during Grey line to work all over the world in the DX window. I have worked Europe, SE Asia & China, Russia, Scandinavia, USA, Canada, Alaska, Central America, South America, Southern & Northern Africa. My loop is tilted to about 45% and faces North East down a valley to improve the lobe directions, rather than sending the signal into the sky as a cloud warmer. So I'm interested to know how things are going for you on your antenna. Regards, Bernie VK4KX |
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