Used excel isotron 220 muscle stimulator for sale dotmed. Here are the instructions how to enable javascript in your web browser. We can produce such a dipole by considering two opposite. The isotron 160c will be assembled on the mast from the top down. From loops to dipoles, there is an indoor antenna thats guaranteed to work for you. 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. Isotron is the trade name for a shortwave antenna marketed by bilal co. Submitted to the faculty of the worcester polytechnic institute. A site dedicated for the am radio amateur and vintage radio. My 40 meter isotron antenna is the one with the small coil on the left side of the painters pole. In switching from that ant to my isotron i got at the most a 1 to 1. Find excel isotron 220 low voltage muscle stimulator chiropractic physical therapy in dallas, texas, united states. A vertical metallic support through the antenna system has no influence to the feedpoint impedance and the resonant frequency. The antenna can also be suspended by running a thin rope through the antenna pipe, and then anchoring the ends of the rope between two tress like a dipole.
Basic antenna theory and application a major qualifying project report. 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. I have build it by following the instructions on the homepage of f5swn, but for 80m band and with copper plates. 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. In those days, qst required manufacturers who wanted to advertise a product in qst to send a sample for evaluation in the arrl lab. Isotron corporation is a small business specializing in materials research for environmental remediation and protection. Similarly, the highly directional antennas can be used provide rural areas, which. One of the hams in our local club often brings them out for field day and usually does well. The opinions expressed in this book are those of the author and not. 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. Save products on your wishlist to buy them later or share with your friends.
Order the model that covers the frequency you will be using. The isotrons were hooked in parallel and mounted on a pair of stacking. I mounted them on the balcony before operating and took them down when i was done. Isotron antenne 80m band antenna isotron for restricted spaces. 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. About isotron antennas the resource is currently listed in in 3 categories. They worked great and, although the mast was six feet from my tv, i could tune a clean signal at 100 w output.
A kind of shortwave antenna consisting of a coil between two angled sheetmetal plates. The isotron 15 antenna is mounted indoors on pvc pipe. A friend gave me an isotron for 40m, several years ago. Home of the am pressexchange, the am forum the largest bbs of its kind,and the am classifieds, photos, audio, and technical information. If your isotron hits the state eoc from the roof of that building, your shortened, twotoniceloadingcapable antenna will do a better job. On 40 and 80m band, it is made of two plates into v whose angles are connected by a coil. 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. Easy, quick, and simple installation tunes and performs without radials or antenna tuners.
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. Same results reported from stations i contacted when switching between antennas the antenna is not hard to tune. 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. My 40 meter antenna has often been called the bird house becauselets face it, ive seen bird houses about this size. Manual 80 antennas parts mounting accessories amatuer ham radio antennas contact isotron antennas isotron, small antenna, lowprofile antenna. The isotron am antennas are the perfect am broadcast antenna for all broadcast band am transmitters from 300 to watts. At the time of this writing, i have been licensed for 45 years and i. Then, to my surprise, the isotron exceeded the performance of the g5rv in. It may behave similar to a receive loop, with nulls broadside to the faces of the loop.
Diy tv antenna, antenna gain, ham radio antenna, wifi antenna, electronics projects, electrical projects, antenne. Our report from him was the same, regardless of antenna. Bilal isotron iso80 stealth 80 meter amateur radio antenna. 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. Since the beginning, isotron has displayed a strong international focus. In fact, i believe the isotrons work just about as well as my home antenna. The g5rv and isotron surpassed the vertical in signal capture. There are ten models available to cover the entire am broadcast band. 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. Here the description of a home made realization for the 40m band.
It is essentially a vertical dipole, in which one side of the dipole is the rf image of the antenna in the ground. One well known example is the bilal isotron antenna. When the isotron antenna appeared on the market, the manufacturer tried to advertise the isotron in qst. It is physically short as compared to a dipole antenna for a given frequency. Manual 201110 modified antennas parts mounting accessories. 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. It is a vertical conductor 4 high, fed at the end near ground. It consists of a coil placed between two angled sheet metal plates.
When an isotron antenna was lab tested at 400w, it reportedly smoked and caught on fire. You will need a metal mast to support the antenna during assembly. After studying the manual carefully, i decided to drive a 4 foot ground rod into the. 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. 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. You will need an open area large enough for the entire run of the wire. I have no personal experience with them but reports are fairly good. Well, ill get the unit hoisted up when the weather clears. This may sound strange, but remember that ground reflects rf as a mirror reflects light. We worked ja1nut on 20 meter cw, and shin was patient enough to endure considerable antenna switching during our qso. 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. On 20 meters, the zr3 had the receiving edge, but on transmit, both antennas performed about the same, judging from reports. Low power, crummy antenna american radio relay league.
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