I used secondhand, coaxfed 20 and 40meter bilal isotron antennas. View and download sirio antenne sd 27 dipole installation manual online. Easy, quick, and simple installation tunes and performs without radials or antenna tuners. When the isotron antenna appeared on the market, the manufacturer tried to advertise the isotron in qst. 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. In the apartment i used secondhand, coaxfed 20 and 40meter bilal isotron antennas. Used excel isotron 220 muscle stimulator for sale dotmed. Solves virtually any restricted space problem for example, a 40 meter isotron measures only 22 inches x 16 inches x 15 inches easy, quick, and simple installation tunes and performs without radials or antenna tuners handles up to watts pep depending on mode and version. Packtennas use full size wire antenna elements that can be configured. Home of the am pressexchange, the am forum the largest bbs of its kind,and the am classifieds, photos, audio, and technical information. Manual 80 antennas parts mounting accessories amatuer ham radio antennas contact isotron antennas isotron, small antenna, lowprofile antenna. 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. I can picture them all on one tower with no wires, control cables or antenna rotors.
Ingenuity compensated for a limited budget in the golden age of radio and itll do. From loops to dipoles, there is an indoor antenna thats guaranteed to work for you. They worked great and, although the mast was six feet from my tv, i could tune a clean signal at 100 w output. 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. It may behave similar to a receive loop, with nulls broadside to the faces of the loop. The g5rv and isotron surpassed the vertical in signal capture. Easy, quick, and simple installation tunes and performs without radials or antenna tuners handles up to watts pep depending on mode and version. My hf antenna is a bugcatcher style vertical that has netted me cw and phone contacts worldwide using my icom ic706mkii. Isotron antennas 80 meter isotron antenna iso80 size h x w x d 32 x 16 x 15 bandwidth 110 khz. My 40 meter antenna has often been called the bird house becauselets face it, ive seen bird houses about this size. The text explains both the basic theory of antennas and its application to practical designs. About isotron antennas the resource is currently listed in in 3 categories.
Solve virtually any restricted space problem 40 meter isotron only 22 inches x 16 inches x 15 inches easy, quick, and simple installation. In fact, im wondering about the other bands160, 40, 20, 17, 15, and 10. Here are the instructions how to enable javascript in your web browser. Kraus this text is for the course on antennas offered to the seniorgraduate level by most electrical engineering departments. The feedpoint is what determines how the antenna will match the transmitter and measurements taken at the connector of the antenna. Bilal isotron iso80 stealth 80 meter amateur radio antenna. It worked a treat with a very low swr across most of the band. Documents, articles, schematics, and manuals hfantenna.
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. When an isotron antenna was lab tested at 400w, it reportedly smoked and caught on fire. Mount a ubolt at the top of the mast where the antenna is to be. A good antenna does not have to be the best antenna in all cases. Well, ill get the unit hoisted up when the weather clears. I am going to buy either an 80 or 40 isotron from bilal.
You can enjoy the pleasures of amateur radio to a degree that you may not have. In simple terms, we designed the isotrons into a three dimensional package. A stealth antenna is one which is designed to go unnoticed. Explain resonant and nonresonant modes of long wire antenna. Nbc specs pdf document from 1986 on video and audio levels for the network. 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 consists of a coil placed between two angled sheet metal plates. On the hf bands, a bumpermounted homebrew antennathat costs about the same as the vhf antennaadded the bonus of a fun day at the workbench. Manual 40 antennas parts mounting accessories amatuer ham radio antennas contact isotron antennas isotron, small antenna, lowprofile antenna.
It is physically short as compared to a dipole antenna for a given frequency. Sirio antenne sd 27 dipole installation manual pdf. If we assume othe average beamwidth of rhombic antenna as 10, then design an antenna system such that it will radiate maximum power over the. A kind of shortwave antenna consisting of a coil between two angled sheetmetal plates. A vertical metallic support through the antenna system has no influence to the feedpoint impedance and the resonant frequency. Find excel isotron 220 low voltage muscle stimulator chiropractic physical therapy in dallas, texas, united states. Simple gain antenna for the beginner 778,544 bytes, pdf file qst august. Same results reported from stations i contacted when switching between antennas the antenna is not hard to tune. My 40 meter isotron antenna is the one with the small coil on the left side of the painters pole. Antenna should be mounted on a metal mast with a maximum size of 1.
A friend gave me an isotron for 40m, several years ago. It will also appeal to practicing engineers working on antenna development. On 20 meters, the zr3 had the receiving edge, but on transmit, both antennas performed about the same, judging from reports. 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. Design a rhombic antenna to operate at 20mhz when the angle of elevation angle 10o. Isotron is the trade name for a shortwave antenna marketed by bilal co. Future sex was a 1990s magazine based in san francisco and published by kundalini publishing. 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. Xe1xnp 80 meter qso datrontransworld tw100f flyaway suitcase hf radio and isotron antenna.
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 5479 times. The isotron 15 antenna is mounted indoors on pvc pipe. Antennas parts mounting accessories amatuer ham radio antennas contact isotron antennas isotron, small antenna, lowprofile antenna. It only needs to be the best antenna one can deploy. Solves virtually any restricted space problem for example, a 40 meter isotron measures only 22 inches x 16 inches x 15 inches easy, quick, and simple installation tunes and performs without radials or antenna tuners handles up to. Packtennas are light weight, compact, portable hf antenna systems ideal for operating on the trail, at the campsite, on field day, sota activation, air travel, or hoa restricted locations. Low power, crummy antenna american radio relay league. 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.
I mounted them on the balcony before operating and took them down when i was done. Then, to my surprise, the isotron exceeded the performance of the g5rv in. Diy tv antenna, antenna gain, ham radio antenna, wifi antenna, electronics projects, electrical projects, antenne. Since the beginning, isotron has displayed a strong international focus. In the case of the ehantenna, i see its strength in the low bands 1608040m. In those days, qst required manufacturers who wanted to advertise a product in qst to send a sample for evaluation in the arrl lab.
One well known example is the bilal isotron antenna. Our report from him was the same, regardless of antenna. A site dedicated for the am radio amateur and vintage radio. Sgc smartuners for stealth antennas free click on download your copy. Therefore whether the circuit is on your radio board or hanging as an antenna, all formulas and theories apply. We worked ja1nut on 20 meter cw, and shin was patient enough to endure considerable antenna switching during our qso. My plan is to backengineer homebrew versions from this one you could check the antennex homepage at. In attic, spirals, wire loops, magnetic loop antennas. Packtenna makes ultralight, portable hf amateur radio antenna systems and accessories.
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