80 10 Meter Dipole

My 50 foot tower in the background next to the house supports my triband rotatable dipole and two 2-meter beamsone vertical and one horizontal. The 80 meter band was made available to amateurs in the United States by the Third National Radio Conference on October 10, 1924. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Perfect for building a dipole. Thicker wire provides wider operating bandwidth. The Off Center Fed Dipole – by Dan, N5AR. I recently helped a friend of mine (a Short Wave Listener) install dipoles for 80, 40, 20, 15 and 10 meters, and his home is in a deed restricted area. The Top five list contains a few antennas that if you have the room for them perform very well. Only 3 left in stock - order soon. Double Bazooka NVIS Antenna Calculator. The random length all band dipole represents some clear advantages in cost and operational flexibility within the limitations of the average Australian suburban block. Wire length and support The length of the fishing rods is 8. Eh antenna plans. 10*10^-9)( 3. 25 MHz, no tone, -600 KHz help a SDXAer to the Honor Roll. 10m -160m Multiband “Z” Antenna. This article describes a specific procedure to adjust a shunt matching coil to assure that the input SWR will remain relatively low (≤ 1. Without Radials. how to build a dipole antena The simplest and easiest way to produce antenna for hf. Example — 80 meters: If you are operating on 3. I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days. vide a good match on the 80, 40, 30, 20, 17, 15, 12, and 10 meter bands whether at a height of 10 feet or 50 feet. For an 80-10 meter OCF dipole antenna, divide the ½ wavelength standard of 468 by the lowest operating frequency of 3. 64 Construction and installation of a dipole for 80-, 40-, 15-, or 10-meters. Fast world wide shipping on the latest top Cb radios and 10 meter radios. Full size dipole for 160 meters @ 268 feet long. Figure-10 shows calculated antenna efficiency at three frequencies across the 40 meter band. The main goal of this work is to design an UWB antenna for underwater communications and its applications. Tilted Folded Dipole Antenna 16 25. This is the second antenna I purchased from them. You will need to hold the antenna well above ground when checking VSWR. The final session of the 80m CC data section contest has resulted in a tie for first place honours in the 100w assisted section for G4RCD and M7V who were well ahead of third place stations G3RMV and M2A. It works just fine and dandy on 20 meters as well but I'd rather have a dedicated 20 meter loop for 20 through 10 meters. The ten meter band was very noisy at my location and no contacts were made. They can operate CW, digital and phone. Antennas for 10 meters are small and easy to build. I also use the triband version (40/20/10). 3 I use the auto tuner Same for 10 meters swr 2. Using the general dipole formula 468/f (MHz)=L (ft) and the lowest design frequency of 3. When I did, the 80 meter dip dropped in frequency. It is a half wave dipole designed for the center frequency of 28. 40 meters on a 80 meter di-pole!), so you may want to double check that before using a balun. Terminated Wide-Band Folded Dipole Topics: antenna, dipole. Click the button below to add the Buckmaster 8 Band 300 Watt OCF Dipole 160, 80, 40, 20, 17, 12, 10 & 6 Meter to your wish list. In fact, about 12 acres of them. Recently, members of Sacramento County ARES got together to build a 20/40 meter trap dipole antenna with a homemade balun. Several models of the X-ray flux modulation observed in the low-mass X-ray binaries (LMXBs), in particular the neutron star LMXBs, deal with Keplerian and epicyclic frequencies of geodesic orbital motion. My 50 foot tower in the background next to the house supports my triband rotatable dipole and two 2-meter beamsone vertical and one horizontal. 5m at the ends. So why would you spend time making an EFHW and a standard 1/2 wave dipole? I made the 1/2 wave dipole for the convenience factor when the summit is marked by a trig. They can operate CW, digital and phone. It's performance compared to the dipole has been very impressive. the k4tr off-center fed "classic windom wire" 80-10 meters A Multiband Antenna That Enjoyed Considerable Popularity in The 1930's was Named for the Amateur Who Wrote a Comprehensive Article About It. Turn your existing 80-meter dipole into a broadband antenna by simply modifying the feed line. If the apex angle is 90 degrees, the inverted vee will require approximately 70 percent of the ground space needed by the flat dipole. Example Problem: +Q-Q d x q A dipole with charge Q and separation d is located on the y-axis with its midpoint at the origin. Overall length is 82 ft. This requires a separate dipole for each band. Works with all HF bands. DX-EE - “No-Trap” 40-20-15-10 meter dipole or inverted V. 2x10 M (2x33 FT) MID-LOADED DIPOLE. , 80, 40, 20, 10 meters. Antennas for 10 meters are small and easy to build. The shunt capacitor (C1) reactance on 40 meters is roughly ten times that of the antenna’s base (feed-point) impedance and therefore has a negligible effect on match-ing. Bow-Tie Dipole Antenna 13 19. 10 Meter Wire Antenna Sizes. Attic Coaxial-Cable Trap Dipole 10-80 Bazooka Antenna Bazooka - WA4EZN Bill's Tak-Antenna - a recommended project!!! Double-L Antenna For 80/160 End Fed Half Wave AA5TB EH antennas G5RV Multi-Band Antenna Hentenna - from N4UJW Horizontal Loop Antenna Construction Isotronant - PA0UNT Joy Stick Antenna K9AY Terminated Loop KC2TX's RX Loops. It will operate on 80, 30, and 17 meters but requires a tuner. The antenna will be resonate at the design chosen bands with an almost flat SWR handling near legal limit without saturation. 648 Mhz 3rd Harmonic Halfwave in space is: 136. For 80 meters, I connect the opposing walls giving me 2 “L” shaped legs of the dipole. Length of an impedance matching section made with 75-ohm cable with a cable velocity factor of 0. Steel Slinky Dipole Antenna 10 to 80 meters band. They can operate CW, digital and phone. Buckmaster OCF Antennas are made from the best quality materials and are designed to give you years of trouble-free service. It was a dependable and well designed radio that was sold in kit form for. So I wanted a self-supporting rotatable dipole for best performance on 12/17 meter as well. This antenna is 58 ft tall and is mounted on a hinged base. Other bands are possible with an ATU. The PEF 160-10 contains a FT-240/61 trifilar wound, 9:1 UNUN (unbalance to unbalance) torrid matching transformer that will match the high input impedance of an end fed antenna into the range where most antenna tuners can produce good performance. Tuned Dipole Antenna Set is contained in a rugged, lightweight storage case and includes four Baluns, Element extension rods, telescoping Elements, 10 Meter Cable, Tape Measure and a antenna balun clamp with a ¼-20 thread for. Quantity: 1. Two 1/4 wave ham sticks in a dipole configuration produce a 1/2 wave dipole antenna. The original was for 160 meters and I cannot say a bad word about the antenna. All wires are in the plane of the horizontal top wire. They cover all bands from 80-10 meters with a wide range antenna tuner. 2 to 1 on all of 40 and 1. 6-80 Meter OCF Dipole Antenna by Alpha Antenna. The first was Navassa '88. On 40 meters this antenna configuration offers reasonable DX performance with a take-off angle of 27 degrees for a center height of 10 feet. Off-center fed dipole can operate well on even harmonics of its lowest frequency, e. Just click on the appropriate link to see a table or figure and use your back button on your browser to return. moved to VK1HW. 15) gives a folded dipole with a length of 65. Homebrew 40/80 Trap Dipole Design This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. This simplified arrangement has several advantages, including a shorter ground distance between the ends. 40m or 80m dipole 10-20ft off the. 5 SWR, calculations showed this would require a cage of almost 6 inches. As the fishing poles I had lying around were 8. 5 80/40 Dipole W5DXP (148 ft) 11 8. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. full-size, half-wavelength, horizontal, broadside dipole on every band from 160 through 10 meters. To construct each dipole leg: Simply tie a one-inch loop in one end with a bowline knot to fit over the screw of the adjustable arm adapter. In conclusion: This project has been fun and worthwhile! And I didn't have to do any climbing! 73 de KD1BL. 6 MHz and you arrive at an overall length of 130'. Find great deals on eBay for 80 meter dipole antenna. The upper part of the band, mostly used for voice, is often referred to as 75 meters, since the wavelength is between 80 and 75 meters. If you measured the SWR of a 80 meter dipole with the same meter and same dipole, but in one case through 300 feet of RG-58 (more loss), versus 50 feet of RG-213 (less loss) you would measure two different SWR curves. 2 uV receiver sensitivity 5 pole crystal ladder filter for selectivity 325 or 175 kHz tuning range, selectable at build Coarse and Fine tuning controls 8 ohm - 500 mW speaker output SSB, CW, and, "TUNE" mode 50mA Rx current (with optional Digital Dial) Inexpensive electret microphone input All through hole construction. I read a nice article by A. 25, rising gradually to 2. This antenna is similar in construction to the 2-meter OFC sleeve dipole I built over 8 years ago, but it is a simple center-fed dipole. 5 858 160-80-40 trap dipole @ 50 feet K9DRP 12 12 24 10 240 x1. 2 40 meters 7. The PEF 160-10 contains a FT-240/61 trifilar wound, 9:1 UNUN (unbalance to unbalance) torrid matching transformer that will match the high input impedance of an end fed antenna into the range where most antenna tuners can produce good performance. But my old CB base antenna I had is long gone and I had always wanted to see how a vertical dipole antenna would work. • Make a 40 meter dipole and feed with twin lead or balun and coax • Make a 20 meter dipole and attach at same feed as 40 meter dipole • 40 meter operation has very high impedance for 20 meter dipole so all energy to 40 meter dipole • 20 meter operation has very high impedance for 40 meter dipole so all energy to 20 meter dipole. I'm mostly working FT8 and experimenting with QRP on WSPR mode. It’s a great HF antenna for the ham radio operator with a smaller backyard! The. Radiation pattern of a Vertically Oriented Buddipole™ on 7. A good choice is a dipole at 50 feet and a small Yagi at 100 feet A small triband Yagi for 20, 15 and 10 meters A small Yagi 50 feet high produces competitive results at 1500 miles A small Yagi 80-100 feet high is excellent for 1500 miles or more two stacked triband Yagis at 40 and 80 ft produces excellent results. com in a single category. The next photos show the 10 meter dipole installed and ready for use. The SWR plot for an 80 meter broadband dipole is shown below. serving ham radio since 1982 Largest Ham radio Store in NY Home Contact Us About Us Add To Favorite Sellers Menu Home Contact Us About Us Add To Favorite Sellers Categories Antennas Mobile Antennas Base Coax cables SWR Meters Power Supplies Alpha Delta Model DX-CC - Parallel Dipole Wire Antenna 80/40/20/10. moved to VK1HW. 40m - 80m - 160m Short Dipole Antenna. 160 Meter Off Center Fed Dipole sometimes known as a Windom, if DX is your goal then RADIO WAVZ brings you new technology at an affordable price. Quantity: 1. 2 to 1 on all of 40 and 1. K6IF/W6BDN 40 Meter Rotatable Dipole. - 160/80/40 meter band - trapped dipole - 2007. HF Electronics bvba is specialist in de verkoop en verhuur van radio apparatuur voor professioneel en amateur gebruik. Answers like "I can work everything I hear", or "I have worked "X" amount of DX-stations in the first hour on the air" are nearly useless. Wire Antennas. Buy HyEndfed 5 band 80/40/20/(15)/10 HyEndfed Antennas online at £159. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. 2 uV receiver sensitivity 5 pole crystal ladder filter for selectivity 325 or 175 kHz tuning range, selectable at build Coarse and Fine tuning controls 8 ohm - 500 mW speaker output SSB, CW, and, "TUNE" mode 50mA Rx current (with optional Digital Dial) Inexpensive electret microphone input All through hole construction. The antenna works on the bands as advertised with low SWR. Looking back in the log, on September 14 the 4-square was 3 S-units louder than the 80-ft-high dipole. One big consideration was weight, 4 cage dipoles for 40/30/20/10 uses almost 1,000 feet of wire. The original windom was a single wire, with a good ground system serving as the other side. This pattern will reverse when the feed-point is moved as little as 5% off center. Find great deals on SOTABEAMS for Four-band portable dipole antenna system for 20-30-40-80m. Cebik's 88 foot backup doublet. This month I am describing a takeoff on the same idea. My first dipole antenna. Now it's time to extend the Fan with more bands. 19 one side. I took the KX3's autotuner out of the loop and test transmitted at all the QRP Watering Hole frequencies on 80, 40, 20, 17 and 15 Meters. fullwave dipole when driven at the center will display a typical ½ wave dipole pattern being directional broadside with null off the ends. At a given frequency, one dipole is matched, the others have high impedance. Galaxy, Magnum, Stryker, Connex and Ranger. It is a half wave dipole designed for the center frequency of 28. There for if you can have only one HF antenna the random length all band dipole would be a pretty good choice. Quantity: 1. 80 one side. The AIM-4170C SWR readings and the online transmission line loss calculator were used to calculate the efficiency of the completed bowtie antenna. Fortunately, that fact tends to level the playing field for most hams on 80 meters. We have been building these antennas for over 19 years. Monoband HF Dipole Antenna (89,852 bytes, PDF file) QST April 1993, p. 40 Meter Bowtie Calculated Antenna Efficiency. 5:1 or less!. Short dipole for 60 meter Tropical Band By Enrique A. I can let the antenna down by uncoiling the extra rope at each end. this, one thing that is certain is that this antenna performs extremely well on 80 meters in a small space, and it is very difficult to get it wrong for that band. Find great deals on eBay for 80 meter dipole antenna. 19 one side. Full size dipole for 160 meters @ 268 feet long. Only 3 left in stock - order soon. 5 feet (including the coils). An Attic Coaxial-Cable trap dipole for 10, 15, 20, 30, 40, and 80 meters W5GI Mystery Antenna W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software. The wire is exactly 66ft long. If it is a straight dipole, fed with coaxial line, what frequency is it cut for? Or, is it a fan dipole? There is no such thing as a dipole for 40 - 10. I easily worked both stateside and DX on 80-10 meters. 34 x 10-30 coulomb-meters). 000 17 meters: less than 1:5 entire band 20 meters: less than 1. It includes the popular 10-, 15-, 20-, 40-, and 80-meter bands. The SuperLoop 80® is an outstanding performer on all bands, 80 - 10 meters. 2% for the longest side after determining the half wave length at the lowest operating frequency…. Buy HyEndfed 5 band 80/40/20/(15)/10 HyEndfed Antennas online at £159. Actually that dipole is 98. B W4RNL Antenna Theory. To remedy the narrow bandwidth I used a bowtie dipole antenna for 10 meters. The antenna itself is 3. 1 over entire band 20 meters swr 1. The Wire Size can range from 16 AWG to 12 AWG. I use an LDG autotuner and it easily tunes this loop on 80 – 10 (all of my QSOs have been on 80, 40, 30 or 20 though). DX-LB Low Band Dipole Covers 160-80-40 meters with an overall length of only 100 ft. Fortunately, that fact tends to level the playing field for most hams on 80 meters. An in-line balun takes care of potential feedline unbalance and radiation problems. 60*10^-3 ) =1. Off-Center-Fed Dipole, OCFD, Windom. Wideband Dipole for Receiving 16 24. The Antenna Consists Of A Half Wave Length Antenna on the Lowest Frequencey to Used, With a "Single Wire Feeder" Connected Off Center. This includes 12M, 17M, and 30M. The distance between one point to another adjacent point in a wave is known as the wavelength. If the apex angle is 90 degrees, the inverted vee will require approximately 70 percent of the ground space needed by the flat dipole. More Information (OCF Dipole 7 band 80-6 meters antenna) Notable prices as to Connection pace OCF Dipole 7 band 80-6 meters antenna retail outlet, Shop for economical muggy their OCF Dipole 7 band 80-6 meters antenna needed for income!!. Contact one of your local Diamond ® Dealers for current price & availability. If you measured the SWR of a 80 meter dipole with the same meter and same dipole, but in one case through 300 feet of RG-58 (more loss), versus 50 feet of RG-213 (less loss) you would measure two different SWR curves. the k4tr off-center fed "classic windom wire" 80-10 meters A Multiband Antenna That Enjoyed Considerable Popularity in The 1930's was Named for the Amateur Who Wrote a Comprehensive Article About It. Last year I put up an OCF, cut to the length of an 80-meter dipole. Shop HF and VHF Portable Antennas and Accessories for Amateur Radio/Ham Radio with confidence. 82 D (debye), and its percent ionic character is 12. 160 Meter Off Center Fed Dipole sometimes known as a Windom, if DX is your goal then RADIO WAVZ brings you new technology at an affordable price. It's a great HF antenna for the ham radio operator with a smaller backyard! The. ), when the antenna is fed in the center like a regular dipole. 84 meters (~ 272 ft. That's probably an oversimplification, but unless the folks you want to talk to are fairly close, you do really need a low angle of radiation on that band. Add to Bag. The finished antenna easily fits into a 3-foot cube. vide a good match on the 80, 40, 30, 20, 17, 15, 12, and 10 meter bands whether at a height of 10 feet or 50 feet. Then alternately tap the DOWN and UP buttons for minimum SWR (any SWR. Doing the same process 10 turns of the 1/4 inch round tubing made up the 40 meter coil. Thanks everyone! Dave, The Dorchester County EOC in South Carolina is experimenting with various antennas for base and field work. The first was Navassa '88. HyEndFed multiband 80-40-20-(15)-10 meters band antenna. I wanted to change things up and try working a different band other than 40 meters where I have operated the past few Field Days. Length of an impedance matching section made with 75-ohm cable with a cable velocity factor of 0. 05 Is trying to build a trapped dipole for 160/80/40 meter bands. I've used the PAR/LNR end fed half waves with great success on 40, 20, 17 and 10. us, especially on 40, 80 and 160 meters. 6 or less on 160 and 80. 1 MHz with a center height of 10 feet. 400mhz but should cover most of this 200khz spread with low SWR. On the 80- and 40-meter bands, the antenna has remarkably dipole-like patterns and gains and seems to work at least as well as a dipole in the same height range. These Alpha Delta amateur antennas use a no-trap design (except DX-LB). Ham Radio and Amateur Radio online equipment sales. Reenter N6RY and the extended double Zepp. Other bands are possible with an ATU. Double Bazooka NVIS Antenna Calculator. Off Center Fed Dipole/ Windom Antenna OCF8010E-3K 80-10 Meters Rated at 3KW MFJ-17758 Dual Band 80/40. "Welcome to the ARRL's portal for Amateur Radio technology! This page provides links to some of the technical facets of Amateur or "Ham" Radio. For the tube radios of that era, it was fine, since they had a Pi network matching circuit that bragged about 50 to 600 ohm match range. You can feed your dipole with coax, as already mentioned above. I must say that I am impressed, and here are some numbers. The ability to transmit of multiple bands without needing a tuner (and even more with a tuner) is a very desirable factor in choosing a versitle antenna for HF. Overall length is 40 ft. This item is currently in stock. This was a fun project that gave us an opportunity to get some hands- on experience with antenna making. 15M requires an antenna tuner. Amateur Wire Antennas : Hy Power Off Center Fed. This is the second antenna I purchased from them. 3 I use the auto tuner Same for 10 meters swr 2. For the HFp Dipole, the element length is set according to the element chart in the Dipole instructions. The 10-80 meter groundplane vertical antenna is a rugged multiband vertical antenna, That is 43 feet in height. How to make a ham radio coil-loaded meter inverted V dipole hf wire antenna. In addition to the connections to the antenna wire and coax, the instructions suggest MyAntennas End-Fed Half-Wave Antenna for 80 - 10 Meters Bottom Line. Circular Polarization - Turnstile Antenna for 80 meter band with JUMA Turnstile Controller JUMA TC 2018-11-27 OH7SV Click the pictures to enlarge Turnstile antenna on map Turnstile antenna dimensions (only on dipole drawn) Turnstile antenna setup in the field. , on October 4, 1927. At higher frequencies, up to 30 MHz, its gain matches the dipole’s. This will give you the length of each leg of the antenna. Just a brief description, my base station consist of a 100 watt rig that goes to a parallel dipole for 10, 15, 20, 40 and 80 meters. The resulting take-off angle is 27. ~$80 ~$70 ~$300 ~$350 Total Switched Antennas Cost Averaged S-Units By Band Antenna 80 Meters 40 Meters 20 Meters Butternut 80/40 Vertical Dipole 10 9. These are multi-band, center-fed dipole antenna capable of 1,500 watts. 5:1 or less with the 5 ft whips or using the Scorpion Cap Hats™ for a smaller foot print. 80-40m loaded dipole. The AIM-4170C SWR readings and the online transmission line loss calculator were used to calculate the efficiency of the completed bowtie antenna. MFJ-17758 80/40 Meter Dipole Antenna product reviews by real people like you. 14 copper for the wire element. In conclusion: This project has been fun and worthwhile! And I didn't have to do any climbing! 73 de KD1BL. The tower on the right in the picture supports the antenna as described above. serving ham radio since 1982 Largest Ham radio Store in NY Home Contact Us About Us Add To Favorite Sellers Menu Home Contact Us About Us Add To Favorite Sellers Categories Antennas Mobile Antennas Base Coax cables SWR Meters Power Supplies Alpha Delta Model DX-CC - Parallel Dipole Wire Antenna 80/40/20/10. 25, rising gradually to 2. Guaranteed to 2 KW PEP. 40 meters had the 39 Meter shortwave broadcast stations, so at night, 80 meters was pretty much it. Fig 2—Typical N6LF broadband symmetrical half-square for 80 meters. 5 SWR, calculations showed this would require a cage of almost 6 inches. Part Description QTY MFJ Part No. Alpha Delta Parallel Dipole 80-10 82' 80M thru 10M Dipole. Our best selling antenna is our 160 meter, ruggedized "half-sloper". Order 4-Band 5,000 Watt OCF Dipole Antenna: $698 Special Price: $531 (5,000 watt models are special order only and are made on-demand, so will always take a couple weeks to ship. Each sloping dipole element would measure 68. Let’s try this first with a 40m inverted V dipole. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works. Diamond ® Antennas are sold through authorized dealers. The short stubs on each antenna are strategically sized and located to permit more flexibil- ity in adjusting the resonant frequencies of the antenna. 400mhz but should cover most of this 200khz spread with low SWR. The quality workmanship is far superior than others. Next In popularity would likely be the commercially available sloper antennas and trap dipole. Homebrew 40/80 Trap Dipole Design This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. View and Download MFJ VersaTuner III -962D instruction manual online. 5 390 43' vertical w/ 32 radials W9 Division AA9L 22 22 44 13 572 x1. 5m at the ends. I did 24 hour WSPR runs using 5 watts of power with each antenna on successive days. The SuperLoop 80® is an outstanding performer on all bands, 80 - 10 meters. Description. Find great deals on SOTABEAMS for Three-band portable dipole antenna system. Add to Bag. I like to use a home made current choke to keep RF from coming back on the feedline. This item is currently in stock. Save 80-10 meter antenna to get e-mail alerts and updates on MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi. The multi-band dipole is a full-sized 20-meter dipole using 22 gauge stranded insulated wire and subdivided into switched sections to support the 20 -, 17-, 15-, 12-, and 10-meter bands. The EFHW-8010 give me access to all bands from 80 through 10 meters, which was the main selling point for me. Order 4-Band 5,000 Watt OCF Dipole Antenna: $698 Special Price: $531 (5,000 watt models are special order only and are made on-demand, so will always take a couple weeks to ship. 160 METER DIPOLE 1:1 1500w SSB/PEP 200w CW (265 ft) 79. e tuned feeders (high SWR). In other words an 80-meter Windom 137 feet long would have one leg 45. Posted date: January 30, 2015 in: Antenna No Comments. You probably should not solder this loop to keep the wire flexible. Features include: Heavy duty stainless 1/4 inch center threaded, cemented with lock nut eyebolt supports the off center enclosure for years of trouble free service. Not having a lot of room for 40 meter beams, I decided to use the space I do have, which is a long wooded fence in the backyard. A dipole design for the 20-meter band is an efficient and inexpensive antenna for the novice and veteran ham enthusiast alike. The loop really, really cuts the mustard on 160, 80 and 40 meters compared to a dipole at the same height. W8MDE 10 Meter Rotatable Dipole I spent Father's Day finishing up my 10 meter rotatable dipole antenna project for this year's ARRL Field Day which is coming up in a couple weeks. I read a nice article by A. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on all bands. This will give you the length of each leg of the antenna. It can be designed for use from 160 thru 10 meters very easily using the standard 1/2 wave dipole formula: 468/freqmhz = total length (ft) end to end The exact length is not critical! If you don't have room for the 160 or 80 meter versionthen design it for 40 meters and up!. It works just fine and dandy on 20 meters as well but I'd rather have a dedicated 20 meter loop for 20 through 10 meters. 5 80 meters 3. The Hy Power Off Center Fed Antenna is a very efficient and effective multi band antenna. com in a single category. First, I used a perfectly tuned 80 meter dipole to add the 40 meter antenna under. This rotatable dipole lets you focus your signal in the direction you want so you can work some real DX! Small, low profile, inconspicuous. Off Center Fed Dipole/ Windom Antenna OCF8010E-3K 80-10 Meters Rated at 3KW MFJ-17758 Dual Band 80/40. It's a Spi-Ro LS-80K limited space 80-meter wire dipole. Thanks everyone! Dave, The Dorchester County EOC in South Carolina is experimenting with various antennas for base and field work. 092 wavelength long -2Rr decreases approximately as 1/(length) -So Rr is approximately 5 ohms -With 10 ohms ground loss, the efficiency is 33% - Assumes no trap/inductor losses (trap loss could add 2dB) -Now your 100 watt transmit signal results in only. It will not operate on the 60 meter band in 5 mhz without a full range outboard antenna tuner. This will give you the length of each leg of the antenna. One of the parts of the video that intrigued me was how low the SWR was across all the bands. The diagram above depicts the 17 and 20 meter delta loops setup at my QTH. This antenna will be integrated into these sensors in order to allow the communication. us, especially on 40, 80 and 160 meters. This antenna is designed to work on 80 to 10. Sold at 38. ZEROFIVE-ANTENNAS MULTIBAND GROUNDPLANE VERTICAL ANTENNA INSTALLATION TIPS MANUAL This manual is for the 10-80 meter freestanding Ground Plane vertical antenna. For this reason the 40 meter section was left a little long so that when the 80 meter section is the correct length, the 40 meter section resonates on the desired frequency. I haven't made any contacts as I only got a lot of static on 10 meters. Product Details. Homemade 10 & 20 meter dipole. Save 80-10 meter antenna to get e-mail alerts and updates on MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi. If a survey were taken of all shortwave DXers to find the antennas they use, I suspect the majority would be found using the random wire. 10 meters swr 1. Multi-Dipole Antenna Has Low SWR and Uses No Traps. ~$80 ~$70 ~$300 ~$350 Total Switched Antennas Cost Averaged S-Units By Band Antenna 80 Meters 40 Meters 20 Meters Butternut 80/40 Vertical Dipole 10 9. The band was allocated on a worldwide basis by the International Radiotelegraph Conference in Washington, D. 85 ft (around 68 ft, 10 in. 400mhz but should cover most of this 200khz spread with low SWR. Posted date: January 30, 2015 in: Antenna No Comments. Add to Bag. The end fed antenna is essentially half a dipole, it uses a good earth connection to complete the arraignment. It’s coax-fed with a 4:1 balun, but in spite of this I’ve had QSOs at distances of up to 2000 miles (SSB phone, 15 watts; also 1000 miles with PSK31 and 5 watts). Hassle free! Wide bandwidth and no tuner needed!!!. For the tube radios of that era, it was fine, since they had a Pi network matching circuit that bragged about 50 to 600 ohm match range. As a “compromise” antenna I’m pretty happy with it!. I have centred the tuning around 28. Place a 1:1 Balun on the Antenna end of the Feedline. 5KW PEP rated - FREE shipping in USA. 64 Construction and installation of a dipole for 80-, 40-, 15-, or 10-meters. The Antenna Consists Of A Half Wave Length Antenna on the Lowest Frequencey to Used, With a "Single Wire Feeder" Connected Off Center. Save 80-10 meter antenna to get e-mail alerts and updates on MFJ 1778 G5RV 10-160 Meters Wire Antenna,10 - 80 Meters As Dipole 160 As Marconi. The fishing poles should be as long as possible. Multi-Dipole Antenna Has Low SWR and Uses No Traps. 40m - 80m - 160m Short Dipole Antenna. The Wire Size can range from 16 AWG to 12 AWG. 5 MHz and goes up to 4.