开云体育

Simon,?

In the case of small confined areas where one cannot put up a full size wire loop or Yagi or dipoles/end fed long wires they do the job. I've worked on HF 20 meters well over 11000 kilometers approximately 7000 miles using a magnetic loop antenna from inside and have hundreds of contacts from 500 to 4000 miles from Indiana here in the United States using magnetic loop antennas with a 5 Kv Air Variable before. Soon I hope to purchase some vacuum variables and build?several loops for various frequency bands especially 75 meters, 60 meters, and 40 as well as a couple of loops for 20, 17, 15 meters. I've found them to be highly useful and practical in limited space configurations where you can't put up a full wave dipole or delta loop which at 75 meters is approximately 260 feet or 80 meters in length. Also aluminum loops look good and stay cleaner than the oxidation that you will see with a copper tubing loop.?

Right now at this time I easily pick up stations on shortwave from New Zealand, Algeria, VOA Botswana, Madagascar and others using a magnetic loop. Over the years I've had various antenna configurations from a large farming area in the country where I used as much as 2500 feet (760 meters) of wire approximately 10 to 15 meters (35 to 50 feet) above ground which was quite an antenna to put up and great until storms or icing occasionally would take it down. The loops fit the bill for now even though they are not an optimal antenna and I would much rather be building a long wire loop configuration with a tuner or even a delta loop for 75 meters and 40 and above.?

Of course you are going to have some degradation in performance with a magnetic loop because a smaller antenna and less in the way of signal strength but also if properly constructed can be a great antenna for listening to DX. Good luck.