Use open wire or ladder line to feed the loop, employ a wide-range antenna tuner, and it becomes a wonderful multi-band antenna. To determine the wire length, use the formula 468/frequency. Ver2cal'Wire'Antenna' • Actually'a'ver2cally'orientated' resonate'1/2'wave'dipole'with' the'earth'being'the' return ' half' • Due'to'poor'ground' conduc2vity'a. really a random-length dipole on all but 20 mfrs. It performs well and excellent on 20 meters but I noticed my 20 meter aluminum dipole seemed to get a better signal on 20 than does my G5RV. One side of the dipole goes up from near ground level to about 14 meters (45 feet), then out (25 meters) toward the front of my lot. Yes, that's in the near field, but still it is encouraging. I was thinking of trying a random wire antenna fed with a 9:1 unun. 28 Antennas, Repeater-Working Antennas For The Amateur In Rural Areas (White K3WBH), CQ 1980, Apr pg 18 Antennas, Restoring HF Trapped Tri-Banders, (Ireland VK6VZ), CQ 2001, Jan pg. 285 with less than 1. 2:1 or less. 15 m and 20m the swr is less than 1. 4 meter of RG-58CU cable. RE: 160 Meter Longwire for Limited Spaces; It is great to hear that people keep trying new things. People have had luck hanging wires out the window or end feeding a random wire strung up out of the window. The field strength on 7. Cebik (W4RNL) or the "W6SAI HF Antenna Book" by William Orr (W6SAI). for the 160 Meter Band. It will match almost any random length of wire to any transmitter from 160 thru 10 meters. For reception, however, a lossy antenna can be a serious asset, and the pattern and directivity very helpful, especially at longer wavelengths. So a symmetrical antenna has to be the choice (so no verticals needing radials). 22 Different Wire Antennas for the 160 Meter Band by TopbandHams. 9 MHz Full-Wave Loop Antenna. A Concentric Loop Antenna for 160 and 80 Meters By; John Gagen - W2YR. If you only have one support an end-fed antenna may suit you better. Thank you for purchasing the MFJ-16010 Random Wire Antenna Tuner. Antennas: Conti Superloops of various sizes (7’x25′, 10’x20′, etc), 26-foot outdoor twinlead random wire sloped up to the 9-foot peak of carport Antenna combiner I bought Radio Plus’ Quantum Phaser in December 2014 to phase a vertical and a tuned loop to get a rotatable cardioid pattern that can yield front-to-back signal ratios in. A small yard is definately a problem. I can tune all bands but 160 meters. com in 4 categories. After much trimming, it tunes the full 160m and 80m bands by selecting tap points on the coil with an alligator clip connected to the end of the radiator wire. For some magic numbers on random wire antennas try the following: With a 9:1 balun and 53 feet of wire you should be able to tune 160 through 10 Meters with a SWR of 2. Looking to buy ? We showcase a broad group of and much more. Longwire antennas are typically designed so the lobes of that gain fall in desired directions. It is an impedance 9:1 transformer to feed a high impedance, end fed (unbalanced) random wire which is likely to be a few hundred ohms, and transform it into something closer to a 50 ohm (unbalanced) coaxial input, hence UnUn. You will have to be the arbiter of choices. The tuner (for low power) can be made quite small, and 10 metres of wire provides 20m and 10m bands, and with a bit of tweaking 6m as well. This one is basically a random wire antenna using 400 feet of 12 gauge stranded, insulated wire in a U configuration with 9:1 RF transformer outside where one end is grounded and RG-214 cable into the house which supports requires not antenna tuner from 3-30Mhz. The wire was resonant on 7. 22 Different Wire Antennas for the 160 Meter Band by TopbandHams. Incredibly long (~225') Random Wire Antenna (works on 160) This antenna came about because I was given a large roll of 24 gauge wire, and I really wanted an antenna I could tune up on 160 meters. Different sources use different expressions for the threshold of when an antenna becomes a long-wire antenna. But performance is down about 8-12db on a dipole on 80m. Originally these antennas were called "half wavelength Hertz Aerials" and were fed with a single wire. Multiband Dipole Antenna 10 14. MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi - $74. Let us not confuse the End-Fed Half Wave antenna with the Random Length End Fed wire. You can get multiband use out of a full-wave loop by using balanced feeders into a balanced antenna transmatch (i. Usually any wire length that is non resonant on the band or bands desired will work with the 4:1 ratio. In order to get an idea of the right place to start, certain formulas are generally accepted. It will match almost any random length of wire to any transmitter from 160 thru 10 meters. Personally, I use a slightly different antenna system for shortwave listening, where the antenna is placed much further away from the house. But performance is down about 8-12db on a dipole on 80m. An Indoor HF Stealth Antenna I close the loop completely for 160 meters operation. As for the theory of operation, it remains a mystery. While there are antennas which are more complex than an inverted vee, there are still several issues to be considered. The MW550P is an active preselector and antenna matching unit for AM broadcast and 160 m reception. As an example, a 28-31 foot wire will typically allow 40 thru 10 meter coverage and a 43-50 foot wire will provide access to 80 thru 10 meters. 2:1 or less. The folded unipole antenna is a type of monopole antenna; it consists of a vertical metal rod or mast mounted over a conductive surface called a ground plane. Better yet, it worked, I made contacts on all bands. Will be shipped out ASAP, please allow up to two weeks for delivery, thank you for your support. The system is not terribly bad on 160 meters. This is Hi-Power QRO 9:1 Balun / Unun. They advised that other compact aerials - even mobile aerials - were a better choice if space stopped me from putting up a "bit of wire" in the sky. The larger the wire, the wider the bandwidth. TPA TUNABLE PREAMP & ACTIVE ANTENNA (Cat. The Hy Power Off Center Fed Antenna is a very efficient and effective multi band antenna. Random-length loop antenna for 160-40? The plan would be to use it mostly for NVIS work on 160 through 40 meters, open wire line works great. Dipole Antenna - Balun 9 13. Every horizontal antenna is subject to essentially the same general phenomena that affect horizontal dipoles in terms of their height above ground. Just over 300 people responded. 8MHz, thiswould be ~273 feet at minimum. Consider using a hamstick on a spike or mounted to your deck. To remedy the above problem, (due to restricted land area) I formulated a two turn loop for 160 meters. Well, if you have the space, time and money for that, go for it!. End Fed Random - $79. 4335 Steeles Ave. In this video, I use the very reliable Tecsun PL-680 and a random wire antenna strung in the trees. The most important is the physical size of the antenna used, then its radiation pattern. You build this device, connect the transceiver and a longwire antenna of almost random wire, and GO!!! No SWR on 160/10 meters, no Tuners, perfectOR NOT? The background study:. Later they were fed with two wires (which I generically call openwire) and called a Double-Zepp Aerial (or Antenna) because they could be viewed as being two single-wire Zeppelin antennas, fed with a common balanced feedline. You can use coax cable, random wire or balanced lines. Buckmaster OCF Dipole Antennas Buckmaster's Best Coaxial Cables Antenna Support Rope Antenna Wire Stringliner Reel with 270 feet of Twisted Nylon Line Harken Stainless Steel Pulleys Line-Grips RF Chokes CQ Magazine Archives Great Circle (Azimuthal Equidistant) Maps World Prefix and Worked All States (WAS) Maps HamCall Mousepads Custom Name. The transmitter may have an output RF power up to 200 watts. (Thanks to Skip Behnke, W2OZ for this information. The length of the wire is about 9. TPA TUNABLE PREAMP & ACTIVE ANTENNA (Cat. Originally these antennas were called "half wavelength Hertz Aerials" and were fed with a single wire. Center Frequency: 1. (My dad put it up for me. I'm currently using a ¼ wave slopper fed against my 48 ft tower. Several users report it is possible to use the antenna on 160 mfrs. I briefly considered patenting my design. caution: remove for other fre- quencies on single wire. Trying to load an 80 meter (or higher frequency) antenna on 160 meters can be a disaster for both your signal and the tuner. There is a Magnetic Longwire Balun. “Of all the G5RV antenna system cousins, the ZS6BKW antenna system has come closest to achieving the goal that is part of the G5RV mythology: a multi-band HF antenna consisting of a single wire and simple matching system to cover as many of the amateur HF bands as possible. Antenna for 160 meters band. Some treat all wires at least 1 λ long as long wires. For 160 meters that's in the neighborhood of at least 120-140 feet, give or take some. Recorded audio signal (CW mode, 600Hz pitch) using Audacity on a Mac. The Villages Amateur Radio Club 2015 Antenna Guide for The Villages February 19, 2015. A so-called random wire antenna is an end fed antenna. Hello everyone. 5 without the tuner. 9 Mhz = 257 Feet 8 inches. 5K End Fed Long Wire Antenna. Tel: 0345 2300 599. EVERY rotor control, remote antenna selector also has a common mode choke at each end of the cable! EVERY coax fed antenna has a high impedance common mode choke (a. plot of a long wire loop for 80 meters (one wavelength on 160 meters). For those familiar with the ARRL books Wire Antenna Classics and More Wire Antenna Classics this book has been long awaited. 160 - 6 metres An antenna’s size/length depends on the frequency Wavelength measured in meters What is one disadvantage of a random wire antenna?. The antenna This 10 - 160 meter tuned horizontal loop antenna is fed with 450 ohm ladder line all the way into the ham shack to an Palstar AT1500BAL balanced line antenna tuner. The tuner (for low power) can be made quite small, and 10 metres of wire provides 20m and 10m bands, and with a bit of tweaking 6m as well. 160 Meter Wire Antenna Sizes. In terms of performance, the Stealthy Delta is definitely superior to my single stealthy wire. No extras with. This one is basically a random wire antenna using 400 feet of 12 gauge stranded, insulated wire in a U configuration with 9:1 RF transformer outside where one end is grounded and RG-214 cable into the house which supports requires not antenna tuner from 3-30Mhz. Unlike many of my fellow FRC contesters, I do not have enough land to construct a beverage antenna. 18 copperweld which has been up for over ten years and are now rusty. It seems clear from this very basic, but perfectly reasonable, EZNEC simulation a full wave 160 meter loop running in the 80 meter band is a good antenna for DX work, but leaves much to be desired for NVIS even if you lower it towards the ground like you do with a dipole. The MFJ-16010 is a variable L-network random wire antenna tuner designed to match the low output impedance of your transmitter to the high impedance of a random wire (or vice versa). • Resonant antennas radiate better than non-resonant antennas. The antenna selector switch allows switching to one of the two coax fed antennas (direct or through tuner) and either a balanced line antenna or random wire antenna. An Indoor HF Stealth Antenna I close the loop completely for 160 meters operation. This virtually guarantees that your coax braid is functioning as a random wire connected to one side of the loop unbalancing it electrically. Breaking strength is 280# and, unlike the vinyl jacket found on the vast majority of antenna wire, the polyethylene jacket is 100% UV stable, very tough and slippery - almost like Teflon ®. Title: Scan0025. 160 Meters each leg 126 ft. In terms of performance, the Stealthy Delta is definitely superior to my single stealthy wire. I am not listing these achievements to brag or pat myself on the back and make me feel good about myself. An inexpensive way to begin is to build your own antenna tuner. For my portable random length antennas I use (ex military) stranded copper wire that is woven with some form of fibre. 2 = 33 feet. Those who have used the antenna on 160 say the "GI Mystery" antenna is a quieter receiving aerial compared to other 160-meter antennas. People universally hate bats, and love farmers) If you can't possibly scheme to get your wire more than a dozen feet off the ground, try flinging a few hundred feet of the magnet wire all around the yard in a big loop (find out measurements in the ARRL Handbook or Google "80 meter loop antenna"). The circuit shown has been used with a center fed (open wire) 80 meter antenna having the following configuration. Always keep the non-resonant. While dipoles are very efficient antennas, they are not the only way to go. Cebik, W4RNL. The BT1500A 1500 watt balanced antenna tuner is the only 1500 Watt, Double-L Network antenna tuner on the market today covering 20m to 160m (2500+/-j2500) and 10m - 15m (1000+/-j1000). You can use coax cable, random wire or balanced lines. My property is heavily wooded, so finding a clearing in the direction I wanted was tough. I also have band cut dipoles for 160, 80 and 40. Cebik - W4RNL. Different sources use different expressions for the threshold of when an antenna becomes a long-wire antenna. AA2VG 19 18 37 13 481 x2 962 Invert L with 4 radials, 3 are raised W2JEK 8 7 15 4 60 x2 120 110 ft end fed. The tuning of this antenna was very straightforward; I simply tuned the main element for the center of the 40 meter band and then adjusted the 20 meter stub for the center of the 20 meter band. Shop our selection of Alpha Delta wire antennas, including multi-band sloper antennas for limited-space applications and SWL antennas for superior performance through 30 MHz. I can tune all bands but 160 meters. The principle is the same. The MFJ-941B will monitor either SWR or RF transmitter power in two ranges, 30W or 300W. There is some ham radio action on 80 meters, and even 160 meters, however 20, 30, 40 has most. At least three “experts” tried computer modeling the antenna. 28 Antennas, Repeater-Working Antennas For The Amateur In Rural Areas (White K3WBH), CQ 1980, Apr pg 18 Antennas, Restoring HF Trapped Tri-Banders, (Ireland VK6VZ), CQ 2001, Jan pg. Buy your MFJ-1779B 135 Foot 80 Thru 40 Meter Single Band Dipole Antennafrom Radioworld. Open-wire line is. In order to get an idea of the right place to start, certain formulas are generally accepted. The wire was resonant on 7. Marconi antenna model in MMANA-GAL. Later they were fed with two wires (which I generically call openwire) and called a Double-Zepp Aerial (or Antenna) because they could be viewed as being two single-wire Zeppelin antennas, fed with a common balanced feedline. Use open wire or ladder line to feed the loop, employ a wide-range antenna tuner, and it becomes a wonderful multi-band antenna. To Remote Automatic Antenna Tuners and the 43 Foot Vertical Figure 1 — Test setup used by the author for measuring expected tuner loss with a load that simulates the impedance of a 43 foot vertical antenna on 160 meters. Using the W7FG Open Wire Fed True Ladder Line Multi-Band Dipole Is Easy! Why use an open-wire fed doublet? Quite simply, they are efficient, broadband, easily tuned with a balanced input tuner, nearly unaffected by rain, easy to erect, stay up, and remain "trouble free" for years. 0 MHz rated at 2 KW (SSB) The DXTREME models are the ultimate end-fed antennas with the capability of covering from 160-6 Meters and able to handle legal limit power handling with ease. 22 Different Wire Antennas. Right from the first time I lit it up it work far better then I ever expected. True peak reading meter; Ameritrons ATR-30 true Legal Limit roller inductor antenna tuner is ham radios toughest! Itll handle 1500 Watts continuous carrier output on all modes and all HF bands into most antennas -- even on 160 meters where most antenna tuners fail. It also works fine on all bands above 40m with a tuner, and even below 40m on 60m, and 80m, although the coax losses will be higher. Performance vs Shape: The Proof is in the Patterns. However, there are other schemes for quite effective 160 meter antennas. The BT1500A features two tandem mounted, precision ceramic roller inductors for a truly balanced tuner. Adding the 160 meter antenna proved to be a bit more difficult. My favorite antenna is a plain old random length long wire run through a hole in the wall and thrown into a tree. Anywhere it is not resonant it will produce significant SWR’s above 3:1. 128 - 5-Element Log-Periodic Vertical Antenna for 80m, 40m, 20m. All the gobbly gook and being scared off to try I took the info from an old 1940s hand book and built a 1/2 wave single wire end fed antenna for my vintage stack. See the link below. We offer a variety of multi-band and all-band dipoles that provide great receiving performance with low SWR. The use of the messenger line, which is strongly recommended, will reduce stress on the element wires and keep the antenna from stretching over time, which will change its resonant frequency. I wouldn't have believed using a 35′ antenna on 160 but I made a 500 mile contact with one call. for the 160 Meter Band. Well, if you have the space, time and money for that, go for it!. What are the advantages and disadvantages of the end-fed half wave antenna? I would mention first its ease of installation. As for the theory of operation, it remains a mystery. The folded unipole antenna is a type of monopole antenna; it consists of a vertical metal rod or mast mounted over a conductive surface called a ground plane. I like to use wire with a soft insulation and loop the extra length at the far end back upon itself and tie it in an adjustable knot. It will match almost any random length of wire to any transmitter from 160 through 10 meters. It's up to the designer to select the best design for the job at hand and to utilize that design in the most efficient way. Write a Review. A full wave for 3. Recorded audio signal (CW mode, 600Hz pitch) using Audacity on a Mac. Ver2cal'Wire'Antenna' • Actually'a'ver2cally'orientated' resonate'1/2'wave'dipole'with' the'earth'being'the' return ' half' • Due'to'poor'ground' conduc2vity'a. 2:1 or less. power from the transmitter from 160 through 10 meters. There are 72 ground radial and 8 elevated radials that can be seen. Does anyone have a link to a website or an excellent design for a "random wire" that. The antenna wire is supported at the midpoint by a 32′ fiberglass mast, and the end is tied off to a tree at 35′. 2011, the Emergency Amateur Radio Club of Hawaii (EARCHI) marketed a matchbox-kit for a 6-40 mtr multi-band end-fed antenna. Unlike many of my fellow FRC contesters, I do not have enough land to construct a beverage antenna. 54 cm) above ground would be good, using insulated wire. From a practical standpoint, the antenna should be fed with open wire (ladder) line and a suitable tuner with balanced outputs. Anywhere it is not resonant it will produce significant SWR’s above 3:1. Antenna for 160 meters band. wire type antenna in the world today. The W1SFR End Fed 35' Random Wire Antenna with 9:1 UnUn What is a random wire antenna and how does it work? The term "random" infers that you can use any length of wire you want as an antenna, while that basic fact is true, there are some practical considerations. The Balun operates "stand alone", thus does not require an LDG Tuner. #AM-TPA) Can be used as an active antenna or as a preamplifier for long wire and random length antennas. Maybe it does but you'd never know it from my score. And I’m going to keep this VERY simple. End-Fed Longwire Antenna with a 9:1 UnUn rated at 700 watts, covering 160 meters through 10 meters, only 124' 6" long. However if like me you’re faced with a small lot or perhaps in need of a stealth multi-band antenna or just want to get on 80 or 160 meters with something that works!. 5 turn per 25mm) Number of turns depends on the length of the antenna. Results are excellant. The antenna is actually pulled snug up to each tree. CONS: That much wire can be heavy, causing it to droop. Before that it was 4 years. When no external antenna can be used, the TPA's whip antenna gives excellent results. However, just because an antenna can be made to work is no guarantee that it will perform efficiently. Reading end-of-August 160 meter plans and antenna speculations, it's interesting that one reflector's most popular thread concerns 160m four squares. $\begingroup$ My best operating on 160 meters has been in the field with a random length wire thrown into a tree and a single wire counterpoise laying on the ground. 8MHz, thiswould be ~273 feet at minimum. The 1/2l dipole radiator (driven element) is 10 m long or so. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. The antenna wire is supported at the midpoint by a 32′ fiberglass mast, and the end is tied off to a tree at 35′. The selectivity can be varied by adjusting the antenna coupling and a 4 kHz bandwidth is achievable. They told me they could not possibly work in a fashion that would allow them to be a serious aerial. The 1/2l dipole radiator (driven element) is 10 m long or so. – No, pattern may change from that at resonance and will need to match. As for the theory of operation, it remains a mystery. 133 - Collinear Zepp Antenna. It tunes all bands (160 through 10 meters) with a SWR less than 1. The MW550P will match any antenna (eg. The MFJ-969 Antenna Tuner covers all frequencies from 160 Meters thru 6 Meters, including the "magic band" -- the widest matching range of any full featured antenna tuner. There are many of us on 160 meters who sucessfully operate with pint-size antennas. This weekend we operated Winter Field Day my KXPA100 easily tuned the antenna on 10-160 meters. Using the W7FG Open Wire Fed True Ladder Line Multi-Band Dipole Is Easy! Why use an open-wire fed doublet? Quite simply, they are efficient, broadband, easily tuned with a balanced input tuner, nearly unaffected by rain, easy to erect, stay up, and remain "trouble free" for years. As a matter of interest, we use the Windom BUXCOMM model 802134 up to 2 meters (146 MHz). It needs a ground plane with very good conductivity. The FC-107 is designed to minimize the effects of high SWR on a coaxial line or wire antenna which may cause power reduction in the FT-107M or similar transceiver. This link is listed in our web site directory since Wednesday Mar 9 2005, and till today "A Small Wire Loop Antennas for 160 meters" has been followed for a total of 47519 times. 160M Folded Counterpoise After I had established my antennas for many of the HF bands; dipole for 80-40M and Hex beam for 20-10M, I turned my attention to 160 meters. If you have metal rain gutters near your window, you can probably find a downspout and load it, especially with a remote autotuner like the SGC-237. A long wire antenna is defined as one being at least 2 wavelengths long at the operating frequency. Finally, the lower right circle is drawn around the location of the 160 meter vertical. (I have lots of it on hand!) I didn't bother to calculate the impedance of the line, since the loss is so low anyway. most backyard antennas, the average ham is lucky to achieve an antenna height of 1 wavelength on 10 meters, while the truly fortunate operator may get his wire to 1 wavelength on 17 or 20 meters. 39 feet 181. 10 Hz/15 min). An inexpensive way to begin is to build your own antenna tuner. 9 MHz Full-Wave Loop Antenna. 132 - Double Bobtail Antenna for 20m. The angle of the slope is usually between 45°–60° and the lower end of the wire is at least 1 ⁄ 6 wavelength above the electrical ground. Shop our selection of Alpha Delta wire antennas, including multi-band sloper antennas for limited-space applications and SWL antennas for superior performance through 30 MHz. The use of the messenger line, which is strongly recommended, will reduce stress on the element wires and keep the antenna from stretching over time, which will change its resonant frequency. Antenna consists of choke balun – 20 turns of RG-58CU cable wound on massive ferite core (5 inches in diameter!) then followed by 4. The difficult problems associated with random wire or longwire antennas are caused by ground currents and radiation from the single wire feeder. com Random Length Radiator Wire Antenna Delta Loop Antenna. Half Delta Loop Antenna. Have you any further information about how layout a 160 meter two turn antenna which will be \”out doors\” and externally elevated?. Consider using a hamstick on a spike or mounted to your deck. Some time ago, I set out on a quest to try and improve my low band receiving capabilities. The antenna is everything. Can't wait to try the random wire on the next Sprint. The resource is currently listed in dxzone. (The lengths of the rope supports are misleading in the diagram, by the way. 160 Meter Wire Antennas. MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi - $74. In particular for low frequencies this antenna form is interesting. Now remove the resistor from tuner and connect the antenna. The antenna selector switch allows switching to one of the two coax fed antennas (direct or through tuner) and either a balanced line antenna or random wire antenna. Antennas, Remotely Tuned 160 Meter Inverted-L Antenna (Botts, K4EJQ), CQ 1998, Nov. Built using cheap 4 pair (8 wire) telephone 'ribbon' cable,& (optionally) housed in cheap garden 13mm (~half inch) irrigation plastic hose. My property lot does not allow for putting up a dipole for 160, so any antenna I try is going to be a compromise. This allows me to adjust the antenna's length easily in the field if necessary. Ham on a Hog 2 (For Ham Radio Riders) - via Harley-Davidson CVO Limited 2016 to the Doffo Winery. Real terminated long wire antennas only approximate this condition. But be warned - end-fed antennas can be noisier and also cause more EMC/interference problems. A 9:1 Balun For Your End Fed Antenna End-Fed antennas do have their place in radio and other communications work. The red line marks where the #12 copperweld wire is located. A long wire antenna is defined as one being at least 2 wavelengths long at the operating frequency. Buckmaster 8-Band OCF Dipole Antennas are 270 feet (82 meters) long and work on 160 (tuner may be required), 80, 40, 20, 17, 12, 10, & 6 meters. When the antenna coupler has found a match, the coupler drives the signal to ground on the control wire, which causes the LED to light. To Remote Automatic Antenna Tuners and the 43 Foot Vertical Figure 1 — Test setup used by the author for measuring expected tuner loss with a load that simulates the impedance of a 43 foot vertical antenna on 160 meters. OCF Antennas. I built my first homebrew 160 meter transmitter in 1959 with parts from a discarded TV set. It will match almost any random length of wire to any transmitter from 160 thru 10 meters. The field strength on 7. ANTENNA TUNER, 200 WATTS, RANDOM WIRE. Yes, that's in the near field, but still it is encouraging. Can't wait to try the random wire on the next Sprint. Random Length Radiator Wire Antenna. These length antennas may require some pruning or trimming of the wire to obtain a low VSWR. Unlike many of my fellow FRC contesters, I do not have enough land to construct a beverage antenna. 1 shows the Marconi antenna modeled in MMANA-GAL, erected along the "Z" axis. 73 de W1GV. The Joystick antenna was used many years ago as an all band vertical HF antenna under restricted space situations that would cover from 80 meters thru 10 meters with a tuner and was a great commercial success! Some hams even had success with it on 160 meters. TheBUXCOMM model 802134 Windom is an antenna that enables operation, 80 through 6 meters, without an antenna tuner. The Matching Section is 450 Ohm Open Wire Feedline and is a compromise impedance between the 5/8 Wave antenna elements and the feed point, A 4:1 Current Balun. Homebrew 9:1 Unun for random length wire antennas. With my Sony 7600GR, with simply it’s built-in telescopic antenna, I can pick up an incredible amount of stations. 130 - Earth-Mover Inverted-V Antenna for 40m. As an example, a 28-31 foot wire will typically allow 40 thru 10 meter coverage and a 43-50 foot wire will provide access to 80 thru 10 meters. And I'm going to keep this VERY simple. Portable End-Fed 160-10 Meters Dipole Antenna. I built my first homebrew 160 meter transmitter in 1959 with parts from a discarded TV set. The MFJ-16010 is a variable L-network random wire antenna tuner designed to match the low output impedance of your transmitter to the high impedance of a random wire (or vice versa). 5 foot 450 ohm matching section ending in an SO-239 coaxial. 8 MHz, this would be ~1,093 feet. The MFJ-969 Antenna Tuner covers all frequencies from 160 Meters thru 6 Meters, including the "magic band" -- the widest matching range of any full featured antenna tuner. Antennas, Remotely Tuned 160 Meter Inverted-L Antenna (Botts, K4EJQ), CQ 1998, Nov. I can tune all bands but 160 meters. Wire Antennas. Buckmaster 8-Band OCF Dipole Antennas are 270 feet (82 meters) long and work on 160 (tuner may be required), 80, 40, 20, 17, 12, 10, & 6 meters. MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi - $74. 131 - Coax-Cable Collinear Antennas. Example : For a 160 meter loop, 1005 divided by 1. You build this device, connect the transceiver and a longwire antenna of almost random wire, and GO!!! No SWR on 160/10 meters, no Tuners, perfectOR NOT? The background study:. Random Wire Antenna Lengths. This portion becomes an inverted "L" ungrounded quarter wave vertical, 39 meters in length, made up of #14 stranded (7x22) copper-clad antenna wire. Title: Scan0025. For some magic numbers on random wire antennas try the following: With a 9:1 balun and 53 feet of wire you should be able to tune 160 through 10 Meters with a SWR of 2. 130 - Earth-Mover Inverted-V Antenna for 40m. Performance vs Shape: The Proof is in the Patterns. 9A): Recommended antenna wire length: 24-30 ft (60 ft max), e. The Classic Numbers for All Types of Wire Antennas at HF. would it be better to connect the single wire to the antenna tuner's random wire connection, or to the coax connection, or does it matter? bob k5qwg How much current will actually flow in the center conductor of the shorted coaxial feedline? The single wire connection makes much more sense. But, they do want at least a 4 foot ground rod into the earth. Usually any wire length that is non resonant on the band or bands desired will work with the 4:1 ratio. End Fed Random - $79. • An antenna operated at its resonant frequency doesn’t need a coupler. Does anyone have a link to a website or an excellent design for a "random wire" that. The other serious MFJ-900 deficiency, which can be corrected, is the use of two ground lugs to mount the main coil. Those who have used the antenna on 160 say the "GI Mystery" antenna is a quieter receiving aerial compared to other 160-meter antennas. • An antenna operated at its resonant frequency doesn’t need a coupler. Random Length Radiator Wire Antenna 6 6. Hello everyone. Unfortunately, this antenna is widely misunderstood. Method: IC-7000 with 110ft random wire antenna. 160 Meter Wire Antennas. It also requires maintenance since lots of things can happen to a stretch of wire that long (a 160 meter full-wavelength loop is almost 560 feet long!). As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. After having marginal results on 17 meters using my Alpha-Delta DX-EE with a tuner, I put up a resonant dipole. Anything shorter becomes a challenge to match on the upper bands and increases the. Dimension "B" is the length of antenna wire called the base (width) of the antenna. For my portable random length antennas I use (ex military) stranded copper wire that is woven with some form of fibre. The Hy Power Off Center Fed Antenna is a very efficient and effective multi band antenna. It is not a G5RV because thats a special case with a given length of radiator and feeder. 5 without the tuner. Getting a Big DX Signal on 160-10 m from One Small, Low Antenna Chuck Counselman, W1HIS I live on a small lot in a dense, inner suburb of Boston and Cambridge. With my Sony 7600GR, with simply it's built-in telescopic antenna, I can pick up an incredible amount of stations. Swallow-Tail Antenna 5 5. Then realized his number ended with a "T".