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Title: 160M loopy idea Post by: Opcom on August 18, 2012, 09:03:36 AM W4AAB said: "A full wave loop on 160 will be around 560 feet, using the formula 1005/1.8."
My yard is quite small.. 40x40 Will this sort of thing work properly if it is not a 1-turn loop but instead is something like "4 turns of #10, 35x35 FT rectangular" ?? if so, maybe spacing of 1 FT between the turns? crazy idea but the dipole doesn't work well there and is too noisy to use. Maybe a loop would be better. The loop would have to be lying flat, not standing up. Maybe supported 10-15 FT high at most. Thanks as always, Title: Re: 160M loopy idea Post by: Bill, KD0HG on August 18, 2012, 12:35:55 PM With your situation, a loaded inverted-L might be worth a try for transmitting. Run the feed into the shack and into a tuner. Use the wire on the ground for a counterpoise, not the antenna.
Use a shielded loop for receiving, they work amazingly well. Bill Title: Re: 160M loopy idea Post by: WU2D on August 18, 2012, 01:31:04 PM I have used an inverted L for TX and a small Loop for RX on 160M with good results. Of course a beverage is the best but not in your yard!
Mike WU2D Title: Re: 160M loopy idea Post by: Steve - K4HX on August 18, 2012, 03:47:22 PM I agree with HG. Use a specialized receive antenna to the fight noise.
Title: Re: 160M loopy idea Post by: ke7trp on August 18, 2012, 07:22:49 PM I dream of a Loop. w0vmc has a full size 160 loop and we have probably all heard that thing once or twice. Recently on 40 he was slamming in here when nobody else could even be heard.
I doubt you could do a spiral like that but you are not the first to wonder what would happen if you did. I will wait to see what the others say. What I think I can do and you could do on your lot is an 80 meter loop. Right now I have 122ft of wire in an inverted V at 55ft. Open wire line. I have some pine trees that are 45 to 50 ft tall. I have been thinking of making a loop using those pines as supports. I would have to call in a bucket truck and have everything ready for tree mounting. The big advantage is that the antenna is always balanced since the wire is hooked back in a loop. Never have to watch the current meters and tune the tuner for balance again. C Title: Re: 160M loopy idea Post by: Opcom on December 26, 2012, 09:42:13 PM I tried a loop on the ground, it did not work well for me but Dennis W5FRS got real good results with his. What i finally have done is this: AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
http://amfone.net/Amforum/index.php?topic=32860.msg254912#msg254912 |