Low power, crummy antenna american radio relay league. Order the model that covers the frequency you will be using. In exchange for simplicity and low cost you give up operational space, meaning, the antenna is small and lightweight for storage but when deployed it will take up a lot of linear feet. My 40 meter isotron antenna is the one with the small coil on the left side of the painters pole. You will need a metal mast to support the antenna during assembly. Then, to my surprise, the isotron exceeded the performance of the g5rv in. The isotron antenna represents an interesting antenna design and build techniques for an compact transmitting and receiving antenna to be used in small spaces and locations where there are. Isotron antenne 80m band antenna isotron for restricted spaces. They worked great and, although the mast was six feet from my tv, i could tune a clean signal at 100 w output. We can produce such a dipole by considering two opposite. On 20 meters, the zr3 had the receiving edge, but on transmit, both antennas performed about the same, judging from reports. One well known example is the bilal isotron antenna. Isotron is the trade name for a shortwave antenna marketed by bilal co. Easy, quick, and simple installation tunes and performs without radials or antenna tuners.
Right now, im getting out about 2 miles with in the tune up position and im sure it will vastly improve once im fully operational. The g5rv and isotron surpassed the vertical in signal capture. At the time of this writing, i have been licensed for 45 years and i. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Now that i have enough gnuradio tools to measure reflection coeffecients, sweeping across a range of frequencies collecting magnitue and phase data it should be possible to put them to use for something practical like tuning an antenna. Isotron corporation is a small business specializing in materials research for environmental remediation and protection. It is physically short as compared to a dipole antenna for a given frequency.
Home of the am pressexchange, the am forum the largest bbs of its kind,and the am classifieds, photos, audio, and technical information. Used excel isotron 220 muscle stimulator for sale dotmed. A kind of shortwave antenna consisting of a coil between two angled sheetmetal plates. The opinions expressed in this book are those of the author and not.
Here the description of a home made realization for the 40m band. I mounted them on the balcony before operating and took them down when i was done. Basic antenna theory and application a major qualifying project report. I got around to testing it and found that, mounted on a 20 ft mast in the back yard, it received signals about 2 s units lower than a halfwave dipole mounted about 10 ft higher. It may behave similar to a receive loop, with nulls broadside to the faces of the loop. An isotron antenna solves virtually any restricted space problem for example, a 40 meter isotron measures only 22 inches x 16 inches x 15 inches. It is a vertical conductor 4 high, fed at the end near ground.
In those days, qst required manufacturers who wanted to advertise a product in qst to send a sample for evaluation in the arrl lab. The isotron 160c will be assembled on the mast from the top down. I have no personal experience with them but reports are fairly good. A site dedicated for the am radio amateur and vintage radio. In fact, i believe the isotrons work just about as well as my home antenna. About isotron antennas the resource is currently listed in in 3 categories. I have build it by following the instructions on the homepage of f5swn, but for 80m band and with copper plates. From loops to dipoles, there is an indoor antenna thats guaranteed to work for you. Groundplanes can cause trouble even with the best cb setup, if your groundplane isnt very good then your antenna will not perform as well as it should. Other antenna types isotron isotron antennas are a group of rather strange looking antennas, some of which can be combined on a single mount for multiband capability.
Somewhere on the isotron website, i believe they make the claim that it is a very quiet receive antenna that can be rotated to null out local noise. We worked ja1nut on 20 meter cw, and shin was patient enough to endure considerable antenna switching during our qso. A friend gave me an isotron for 40m, several years ago. Bilal isotron iso80 stealth 80 meter amateur radio antenna. Well, ill get the unit hoisted up when the weather clears. It consists of a coil placed between two angled sheet metal plates. The poynting vector antenna has been one of those novel designs on the fringes for a while now, it has been variously described as the supert, or the flute. The isotrons were hooked in parallel and mounted on a pair of stacking.
The isotron 15 antenna is mounted indoors on pvc pipe. Here are the instructions how to enable javascript in your web browser. It is essentially a vertical dipole, in which one side of the dipole is the rf image of the antenna in the ground. You will need an open area large enough for the entire run of the wire. The isotron am antennas are the perfect am broadcast antenna for all broadcast band am transmitters from 300 to watts. On 40 and 80m band, it is made of two plates into v whose angles are connected by a coil. The company has been involved in large scale radionuclide decontamination as well as chemical and biological agent decontamination and protective equipment since its inception in 1986. When an isotron antenna was lab tested at 400w, it reportedly smoked and caught on fire. The main category is hf antenna manufacturers that is about manufacturers of amateur radio hf antenna this link is listed in our web site directory since friday dec 15 2000, and till today isotron antennas has been followed for a total of 5480 times.
Jun 4, 2017 an isotron antenna solves virtually any restricted space problem for example, a 40 meter isotron measures only 22 inches x 16 inches x 15. Diy tv antenna, antenna gain, ham radio antenna, wifi antenna, electronics projects, electrical projects, antenne. If your isotron hits the state eoc from the roof of that building, your shortened, twotoniceloadingcapable antenna will do a better job. When the isotron antenna appeared on the market, the manufacturer tried to advertise the isotron in qst. Similarly, the highly directional antennas can be used provide rural areas, which. Same results reported from stations i contacted when switching between antennas the antenna is not hard to tune. My 40 meter antenna has often been called the bird house becauselets face it, ive seen bird houses about this size. One of the hams in our local club often brings them out for field day and usually does well. Find excel isotron 220 low voltage muscle stimulator chiropractic physical therapy in dallas, texas, united states.
In the apartment i used secondhand, coaxfed 20 and 40meter bilal isotron antennas. Link to isotron antenna manulas has been recently reported as not working and has been temporarily delisted from our categories check related resources in radio equipmentradio manuals from this page you can download the following manuals, in adobe acrobat format. Easy, quick, and simple installation tunes and performs without radials or antenna tuners handles up to watts pep depending on mode and version. In switching from that ant to my isotron i got at the most a 1 to 1.
Manual 201110 modified antennas parts mounting accessories. Since the beginning, isotron has displayed a strong international focus. Submitted to the faculty of the worcester polytechnic institute. Save products on your wishlist to buy them later or share with your friends.
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