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