G5rv Construction

Just hang one side (the hot side) of the antenna down that mast, the other (cold) side is used as a radial. 25mm ecw for a bifilar winding. Despite it's widespread use on the bands, there are some myths and misconceptions concerning the G5RV that seem to have a life of their own. Unlike the original G5RV, which requires an antenna tuner on all bands, the ZS6BKW / G5RV is capable of operating on 10, 12, 17, 20 & 40m bands, generally without a tuner, and with. 5 db forward gain. We offer a complete line of G5RV anten-nas designed to meet your demanding needs. The main category is G5RV Antennas that is about Homebrew G5RV wire antennas. Restraints Imposed by Location and Other Factors: I have a rather small suburban back yard, 100 feet wide (N-S) and 55 feet deep (E-W). The End Wire Size can range from 16 AWG to 12 AWG. Just what is a dipole antenna, and why are they so popular? By James W. Now check it at the band edges too. THE CONCEPT AND ORIGINAL G5RV. BUILD THIS MULTIBAND FAN DIPOLE FOR ALL BAND HF ANTENNA EXCITEMENT Here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. This antenna generally requires the use of a suitable matching network (antenna. Also, the G5RV will not provide a flat SWR on any band and requires a tuner to work. considering using an Off Center Fed Dipole or a G5RV or a Carolina Windom. Construction: Start by winding a layer of ptfe tape on the rod Cut two 750mm lengths of 1. As pointed out by G3UKV, the basic ZS6BKW antenna is related to the famous G5RV first published in the RSGB Bulletin in 1958 by Louis Varney (ref. You must use at least 70 feet of coax to connect this antenna to your radio or tuner. Make the wire diameter 1. An Ideal replacement for your 1/2 sized G5RV or Windom 40 Designed specifically for small gardens, it is an ideal replacement for those half size antennas such as the 1/2 size G5RV and Windom 40 (51 ft and 66 ft long respectively). The G5RV won't work on most of 75/80 or on 30 or 15. To fix a G5RV, add wire til it's about 125-130 feet long, then add ladder line til it reaches a 1:1 choke balun at the shack. The G5RV antenna is probably one of the most maligned antennas in the world. The G5RV multiband antenna is a specialized example of this approach. i will be picking up a tuner next week so how do you guys think this. Most people think that the famous G5RV antenna was designed as a multi-band antenna, but in fact, it was actually designed as a three - half waves in phase antenna for 14 Mhz by Louis Varney, G5RV. The best balun to use is the one that does the job with the least loss, of course. The G5RV is based on a clever idea in which a length of transmission line is used as a type of automatic AT U to produce an acceptable impedance match to a low impedance line on a number of I-IF. The 3/2 wave 15 meter antenna (really the 40 meter dipole) has significant gain and is about 150Ω resistive depending on height. In the drawing above, it is shown for just four bands, 80 thru 10. On the other bands the signals are 1 to 2 S-points weaker compared to the G5RV. MFJ-1778 G5RV Multiband Antenna 1 MFJ-1778 G5RV 160 through 10m Antenna Introduction The G5RV antenna is a multi-band center-fed dipole antenna capable of 1500 Watts. The main category is G5RV Antennas that is about Homebrew G5RV wire antennas. cdr Author: Charles Campbell Created Date: 1/26/2009 9:29:01 AM. 5:1 or less. Antenna Resources Antenna Calculators - Antenna Plans - Antenna Designs - Construction - Antenna How To - Videos - Antenna Manufacturers On any page you wish to SEARCH simply hold down the CTRL key then press F and type your search term in the dialog box. I The log periodic array represents a kind of brute-force approach to the goal of achieving coverage of multiple HF ham bands. Louis Varney (G5RV) invented this antenna in 1946. I have over 15 antennas on the tower. Title: G5RV-pub_1. Antennas & More G5RV Multi-Band Dipole product reviews by real people like you. The W5GI Multi-band Mystery Antenna is a fundamentally a collinear antenna comprising three half waves in-phase on 20 meters with a half-wave 20 meter line transformer. the g5rv antenna ( part 3 ) construction tips the flat-top: The dimensions of the G5RV flat-top are specified in Part 1. Wire Antennas provide multi-band coverage with just one wire antenna. Shown here is a £37 box of tricks from LDG - It's a simple 1:1 Balun used with a resonant dipole (or G5RV coax>ladder-line join). Specifically the G5RV is a 102 foot dipole with a 31 foot feeder of 450 ohm transmission line. To achieve this the Windom uses a 4:1 voltage balun, which matches the antenna's leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. Richard Lau) at Nibong Tebal, South of Seberang Perai, Penang. The July 1958 edition of the RSGB Bulletin contained an article by Louis Varney G5RV on a novel multiband dipole which did not require traps. My preferred balun for wide and multi-band use is not really a balun as such, it is a choke. Setup is simple and only requires the capability to ensure that the antenna is 35 feet in the air or higher, a lower height than many other high-frequency ham radio antennas require. The G5RV has a reasonable SWR on 80, 40, 20, 15, and 12 meters. The basic principle of a G5RV is that, an antenna nicely resonant on one frequency/band will not be on another. Most of our units are derived from the researched and tested designs of Dr. The RadioWavz G5RV antenna measures only 102 feet across the top for 80 meter - 6 meter operation, and is fed at the center through a low loss 450 ohm twin lead feed-stub. Because it's a dipole there are some directional qualities to it. I have a few of these left, so I'm having a SALE. by Gene Preston, K5GP I read Rick Littlefield's article in the June 2008 issue of QST on off center fed dipoles and was intrigued by the idea that the antenna could be extended to cover 80 meters. Carefully mark the centre of one side and drill a 15mm hole for the SO239 socket. Most other antenna's such as a G5RV is a unbalanced antenna G5RVs etc are only resonant on their target frequency and they are not resonant on their first harmonic - 10 or 40 meters A double bazooka is ok if all you want to do is talk locally, then again, so is just about anything else. CAROLINA WINDOM® 40 This antenna was used to set the 40 meter miles-per-watt world record. It was originally designed to operate as a 3/2 wavelength center fed antenna for 14 MHz, but amateurs soon discovered it would offer reasonable performance on many other bands. All of these packages are available on this CD-ROM in the Supplemental Files directory and then organized by chapter. Home Made Off Center Fed Dipole. revised some wording 1/11/2010. The mounting box Start by putting two pieces of masking tape on opposite sides of the mounting box. Additionally, the Mystery antenna is designed to work at least as well, on the other HF bands as a G5RV. 5 Band Vertical HF Fixed Station 10, 15, 20, 40, and 75 or 80 Meters. Shown here is a £37 box of tricks from LDG - It's a simple 1:1 Balun used with a resonant dipole (or G5RV coax>ladder-line join). The center line is 300 ohm heavy duty twin lead transmission line designed to be dura-ble and light weight. Louis Varney (G5RV himself) also experimented with baluns at the open wire feeder/coax junction but abandoned the idea as the varying reactance at that point can lead to balun saturation and more losses. The G5RV antenna bears his name it's creator callsign, an English amateur radio operator. Starting at the centre of the rod, close wind half the length of the wires towards one end. The RadioWavz G5RV antenna measures only 102 feet across the top for 80 meter - 6 meter operation, and is fed at the center through a low loss 450 ohm twin lead feed-stub. The interaction between the radiating section and the feed-stub makes the G5RV usually easy to match on all-bands from 80 through 10 meters with an ordinary low-cost antenna tuner. The original G5RV "flat-top version" had a 102′ (31. øq goq rone wrr c ouauncqou 10 000 Ok cpa p Wq O a pi g goq DX o u rpg amp. The G5RV double antenna design was originally published in 1958 and was aimed at providing a good antenna for the bands of the day with the minimum of matching requirements. If you have the space the G5RV (40m or 80m version) can be used in conjunction with our fibre glass mast 1833x. Construction: Start by winding a layer of ptfe tape on the rod Cut two 750mm lengths of 1. CO The best built G5RV, ZS6BKW, OCF/WINDOM, SLOPER, and DIPOLE Amateur Radio HF wire antennas. Here I build a multi-band dipole antenna for HF use on 40-20-15-10-6 meters. These are such simple things but yet they cost so much from some places. MFJ-1778M G5RV JR. •Connect A4 to B3, and B4 to C3. on every band, day and night. We offer a complete line of G5RV anten-nas designed to meet your demanding needs. The length is important, as it acts as an impedance reflector on 20m, and a transformer on other bands. MFJ-1778 G5RV. Jerry Sevick and are hand wound with best available components to provide highest possible efficiency. The method of construction and tuning is essentially the same for both antennas but the dimensions are different. It works as follows: On 20m the flat-top is three halfwaves long. The length is important, as it acts as an impedance reflector on 20m, and a transformer on other bands. The mounting box Start by putting two pieces of masking tape on opposite sides of the mounting box. Browse your favorite brands affordable prices free shipping on many items. Half Size G5RV The first antenna I ever bought after gaining my licence was a G5RV. Amateur Radio (G3TXQ) - G5RV Antenna. Construction details for ZS6BKW antenna. What is the purpose of a balun and a unun in a feed line? Browse other questions tagged antenna-construction feed-line balun or ask your G5RV Jr. I'd make sure that elements were separated by no less than one foot. As far as your fan dipole question goes, "as much as you can" is the rule, but that's of course subjective. beam antennas or unwieldy G5RV or long wire. Just what is a dipole antenna, and why are they so popular? By James W. The G5RV is a very popular antenna on the HF amateur band today. 1 m (102 ft) for the "flat-top" standard model. The antenna does not need to be put up as a flat-top array, but can be installed as an inverted-V. Unhappy with the results, he then played around with the overall length and added a balun at the feedpoint. Doublet / G5RV Choke Balun Introduction The Doublet / G5RV Choke is essentially the same as our 1:1 Balun - It's the same internal construction but offers a pair of terminals at the opposite end to the SO239 connector. A 42′ Portable Endfed Multiband HF Antenna with no Wire on the Ground: the "W3EDP Jr. Also, the G5RV will not provide a flat SWR on any band and requires a tuner to work. Construction of the ZS6BKW antenna is essentially the same as the G5RV except for the lengths of the radiators and matching section ladder line. The main difference between a dipole and G5RV is that the transmission line of a G5RV is part of the matching section that allows operation over a number of. The RadioWavz G5RV antenna measures only 102 feet across the top for 80 meter - 6 meter operation, and is fed at the center through a low loss 450 ohm twin lead feed-stub. Professor Brian Austin ZS6BKW remodelled and revised the dimensions of the antenna with improved results and ease of construction. The July 1958 edition of the RSGB Bulletin contained an article by Louis Varney G5RV on a novel multiband dipole which did not require traps. The W2AU Balun is the preferred Balun of Radio Amateurs worldwide. It is a full size antenna on 40 meters and a shortened 80 meter antenna. It's a pretty solid construction and should last a. Despite it's widespread use on the bands, there are some myths and misconceptions concerning the G5RV that seem to have a life of their own. The best balun to use is the one that does the job with the least loss, of course. They include additional discussion, related articles, additional projects, construction details and other useful information. MFJ-1778 G5RV Multiband Antenna 1 MFJ-1778 G5RV 160 through 10m Antenna Introduction The G5RV antenna is a multi-band center-fed dipole antenna capable of 1500 Watts. An Ideal replacement for your 1/2 sized G5RV or Windom 40 Designed specifically for small gardens, it is an ideal replacement for those half size antennas such as the 1/2 size G5RV and Windom 40 (51 ft and 66 ft long respectively). Doublet Dipole Antenna 18 29. Still Under Construction , Sales start NOW , FREE SHIPPING CONUS Welcome to HFWIREANTENNAS. It was originally designed to operate as a 3/2 wavelength center fed antenna for 14 MHz, but amateurs soon discovered it would offer reasonable performance on many other bands. G5RV Need to be mounted high enough that the ladder line is vertical for best operation. CONSTRUCTION NOTES. The 3/2 wave 15 meter antenna (really the 40 meter dipole) has significant gain and is about 150Ω resistive depending on height. The G5RV antenna bears his name it's creator callsign, an English amateur radio operator. Antenna Here is a Dipole You've probably heard this phrase in many QSOs. It is not an acceptable performer on 30, 17, or 10 meters. The other is the 50 Ohms un-balanced to 50 ohms balanced configuration. Hustler 5BTV 5-Band HF Vertical Antenna. net is a Web site dedicated to ham radio (amateur radio). Graphics G8ODE 22 Nov 2010 iss 1. Half Delta Loop Antenna 19 31. The G5RV and Kenwood work well together on all bands, even though it doesn't radiate out of my backyard on some of them. W5GI Mystery Antenna. Twice size G5RV. The G5RV multiband antenna is a specialized example of this approach. The following chart presents the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz. Lou Varney, G5RV himself, recommended NOT to use a balun at the feedpoint junction, but that was "due to the reactance" at the feedpoint and the poor performance of typical baluns at the time. Carefully mark the centre of one side and drill a 15mm hole for the SO239 socket. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. This 40 and 80 meter inverted V antenna is made with loading coils. The G5RV antenna is probably one of the most maligned antennas in the world. Twice size G5RV. Unhappy with the results, he then played around with the overall length and added a balun at the feedpoint. This configuration has a reduced upper frequency limit in comparison to the same transformer when being used to feed a balanced load. solar resistant black double weave dacron rope, and assembly instructions. Wire Antennas provide multi-band coverage with just one wire antenna. There is even a. The ZS6BKW antenna is a better match for our bands than the G5RV. 6 Below is the SWR plot for the initial 'retuned' antenna that uses a series L-C to get back the resonance on 160 meters. W2AU Series Baluns have long been the standard of the industry. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. Graphics G8ODE 22 Nov 2010 iss 1. Here are some interesting facts about common antennas: A 3el full sized perfectly matched yagi will give you about 6. Wideband Dipole for Receiving 16 24. The ZS6BKW is a computer optimized version of the G5RV multi band antenna. The antenna does not need to be put up as a flat-top array, but can be installed as an inverted-V. MY BIG VERTICAL ANTENNA PROJECT This memorandum describes my Fall antenna project, specifically a DX-Engineering, Model DXE-MBVE-1, 43 foot mono pole vertical antenna. Now check it at the band edges too. Been in the air 3 days and worked 9 dx stations. the g5rv antenna ( part 3 ) construction tips the flat-top: The dimensions of the G5RV flat-top are specified in Part 1. As far as your fan dipole question goes, "as much as you can" is the rule, but that's of course subjective. 46ft multi-band antenna for small gardens by g7fek. 32-33), is likely the best option for a portable, HF multiband (6m - 160m), tuned antenna not requiring wires. This is a voltage balun. Wire Antennas provide multi-band coverage with just one wire antenna. The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. The W5GI Multi-band Mystery Antenna is a fundamentally a collinear antenna comprising three half waves in-phase on 20 meters with a half-wave 20 meter line transformer. SWR is low across all 4 bands and receiving strong signal reports. Half Size G5RV The first antenna I ever bought after gaining my licence was a G5RV. G5RV (New Upgraded model) The G5RV was designed by Louis Varney, who held the amateur radio callsign, G5RV. Additionally, the Mystery antenna is designed to work at least as well, on the other HF bands as a G5RV. flat-top, such as you are building. When feeding this antenna with an unbalanced line (such as coaxial cable), it is a good idea to use a 1:1 choke BALUN at the coax to feedpoint connection. The End Wire Size can range from 16 AWG to 12 AWG. It's a pretty solid construction and should last a. Here is my home HF antenna. A dipole is quite easy to construct. The following PDF files maybe of interest to you then, these are some of the better performing Multi-Band HF antennas they been around for years. Multiband capability: The G5RV antenna provide a multiband capability. Antenna Plots produced using MMANA-GAL Antenna Model Program - 10m plots omitted to save space. This is a voltage balun. Louis Varney (G5RV himself) also experimented with baluns at the open wire feeder/coax junction but abandoned the idea as the varying reactance at that point can lead to balun saturation and more losses. On 6m and above, most generally use a dedicated antenna. Radiation resistance is in the range 25 to 200 ohms on all bands, ensuring high radiation efficiency, even with moder-ate earthing arrangements. Construction details for ZS6BKW antenna. NOTE: if you think the balun is too complicated to build, e-mail us. Y1-5K Plus 5 kW, 1:1, Current-Type Balun for Yagi Antennas. To connect it to the radio I needed a Balun. What is the purpose of a balun and a unun in a feed line? Browse other questions tagged antenna-construction feed-line balun or ask your G5RV Jr. Professor Brian Austin ZS6BKW remodelled and revised the dimensions of the antenna with improved results and ease of construction. It's got a shorter span than the g5rv and offers a better tune on 40/20/17/12/10 out of the box, and can be tweaked to add even more bands. Amateur frequency allocations are indicated approximately by the vertical grey bands. The only difference is the feeder. The G5RV is an excellent all HF band antenna. The W0BTU antenna covers more bands than either the G5RV or the ZS6BKW. The G5RV Antenna System Re-Visited The G5RV Antenna System Re-Visited Part 1: The G5RV on 20 meters L. This is a voltage balun. The length of the ladder line should be close to 1/2 wave on 20m for a true G5RV using a 102 ft. Design Considerations Line Impedance, Z 0 - For 1:1 make equal to load and line impedance - For 4:1, make geometric mean of line and load impedance (e. I wanted to make a all band antenna without the long tail of a G5RV. The Western HF-10 multiband dipole was born out of Fred Western M0BZI's attempts at working 80m from a small garden. It works as follows: On 20m the flat-top is three halfwaves long. Dipole construction. Most other antenna's such as a G5RV is a unbalanced antenna G5RVs etc are only resonant on their target frequency and they are not resonant on their first harmonic - 10 or 40 meters A double bazooka is ok if all you want to do is talk locally, then again, so is just about anything else. Bull's Testimonial: I am running the 4 legged and 2 legged Horse fence I bought from you. 38 Stealth Antennas check the SWR in the centre of the band. Starting at the centre of the rod, close wind half the length of the wires towards one end. revised some wording 1/11/2010. Delta Loop Antenna 19 30. Note that the G5RV is a variation of a dipole which is 102 feet long and matches best on 20M—the 102 foot length is three half-wavelengths at 14 MHz. They include additional discussion, related articles, additional projects, construction details and other useful information. G5RV 1 S -point stronger than the G5Rv 30 1 S-point stronger than the G5RV the same as the G5RV 20 1 to 2 S -points less than the G5RV 1 to 2 S -points stronger than the G5RV OK lets see, when does the vertical its work locally? Well that's only on 30m. antenna measures only 51 feet across the top for 40 thru 6 meter operation, and is fed at the center through a low loss 300 ohm twinlead feed-stub. Antenna Resources Antenna Calculators - Antenna Plans - Antenna Designs - Construction - Antenna How To - Videos - Antenna Manufacturers On any page you wish to SEARCH simply hold down the CTRL key then press F and type your search term in the dialog box. •Connect A4 to B3, and B4 to C3. The practical difference in station signal strength at worst will be only an S-point or so if good design and construction is adopted. Details Written by Rick-N8SDR Hits: 45035 Looking for some practical Multi-Band HF Backyard antennas?. Both types of antennas are world renown for their unique characteristics in the 40 meter and 20 meter bands. However modeling can only provide a guide to actual performance. The quality of construction of this antenna is impressive. Many people have found that the G5RV works on many other bands but the design, used at other than 20M, is a compromise. 6:1 at band edges typical). , a dipole or driven element) to an UNbalanced line. 38 Stealth Antennas check the SWR in the centre of the band. The G5RV is a very popular antenna on the HF amateur band today. 03db and so is the lowest loss balun I could find. Home Made Off Center Fed Dipole. They include additional discussion, related articles, additional projects, construction details and other useful information. The G5RV antenna is a type of dipole antenna, and it can be acquired for a very small cost from many ham radio retailers. the g5rv antenna ( part 3 ) construction tips the flat-top: The dimensions of the G5RV flat-top are specified in Part 1. On the other bands the signals are 1 to 2 S-points weaker compared to the G5RV. Parts list 40 feet 300-ohm window line. about the g5rv antenna construction notes and tipical dimensions under Antennas/ G5RV, at G5RV Multiband resource page at dxzone. Still Under Construction , Sales start NOW , FREE SHIPPING CONUS Welcome to HFWIREANTENNAS. solar resistant black double weave dacron rope, and assembly instructions. Professor Brian Austin ZS6BKW remodelled and revised the dimensions of the antenna with improved results and ease of construction. To achieve this the Windom uses a 4:1 voltage balun, which matches the antenna's leg voltages and then uses a separate 1:1 choke balun to isolate the feed line from the vertical radiator. You must use at least 70 feet of coax to connect this antenna to your radio or tuner. 03db and so is the lowest loss balun I could find. Wire Antennas provide multi-band coverage with just one wire antenna. Home Made Off Center Fed Dipole. (• Windom(for(10(- 40(meters(shown. The sloper antenna is a slanted vertical dipole antenna attached to the top of a single tower. MFJ-1778M G5RV JR. The Western HF-10 multiband dipole was born out of Fred Western M0BZI's attempts at working 80m from a small garden. The G5RV antenna, with its special feeder arrangement, is a multiband centre-fed antenna capable of very efficient operation on all hf bands from 3. Few antennas polarise opinion as much as the G5RV - it seems you either swear by it or swear at it! The purpose of this article is to present a few technical facts about the antenna and allow the reader to judge whether or not it might be useful for them. Here is my home HF antenna. WHICH TYPE OF BALUN TO USE - VOLTAGE OR CURRENT. THE OCF FD4 (FD3) WINDOM ANTENNA FD4 (80/40/20/10 m) The 4-band Fritzel model FD4 is a special version of a Windom antenna. Electromagne2c' Wave'Polariza2on' • Electric'and'magne2c'waves'are'at' right'angles'to'each'other' • Magne2c'wave'dissipates'within'a' few'wavelengths'of'antenna. Starting at the centre of the rod, close wind half the length of the wires towards one end. An excellent DX performer and is an ideal replacement for your half size G5RV. My preferred balun for wide and multi-band use is not really a balun as such, it is a choke. Getting back on the air researched several wires which would fit my garden, tried a home-brew Carolina Windom and hey presto its a gem on all bands but Top Band. W3DZZ Multi-band Antenna 80-40-20-15-10m N. It was originally designed to operate as a 3/2 wavelength center fed antenna for 14 MHz, but amateurs soon discovered it would offer reasonable performance on many other bands. The G5RV Antenna is a dipole antenna fed indirectly, through a carefully chosen length of 300Ω or 450Ω twin lead, which acts as an impedance matching network to connect (through a balun) to a standard 50Ω coaxial transmission line. The G5RV antenna is probably one of the most maligned antennas in the world. MFJ 1778M G5RV Jr. Most of our units are derived from the researched and tested designs of Dr. l Installing G5RV dipole- need Balun between ladder line (balanced) and coax (unbalanced) l Quick search on internet said an air-wound Balun would work good …. Unlike the original G5RV, which requires an antenna tuner on all bands, the ZS6BKW / G5RV is capable of operating on 10, 12, 17, 20 & 40m bands, generally without a tuner, and with. To connect it to the radio I needed a Balun. • Connect C4 to a 110 pF, 6 kV capacitor. antenna measures only 51 feet across the top for 40 thru 6 meter operation, and is fed at the center through a low loss 450 ohm ladder line. And here are the elements for the antenna for the above SWR plot. It competes in popularity with the "Half Size G5RV" from England. The T joiner is the centre of the G5RV. 1 m) horizontal span with a 34′ length of matching ladder line. Jerry Sevick and are hand wound with best available components to provide highest possible efficiency. This dipole antenna is very popular because of its small size and for the availability or its necessary construction components. This 40 and 80 meter inverted V antenna is made with loading coils. WHICH TYPE OF BALUN TO USE - VOLTAGE OR CURRENT. Construction The 1:6 voltage balun has 5 turns wound evenly spaced around the L15 ferrite toroid core with the five individual windings wound close together. Amateur Radio (G3TXQ) - Common-mode chokes. The only difference is the feeder. The original G5RV "flat-top version" had a 102′ (31. Twice size G5RV. degrees) will give good results on DX, outperforming a G5RV, doublet or similar by up to 2 Spts. Only at eHam. ("Bus") Healy, NJ2L Assistant Technical Editor ipole antennas have been widely used since the early days of radio. 6 Below is the SWR plot for the initial 'retuned' antenna that uses a series L-C to get back the resonance on 160 meters. The method of construction and tuning is essentially the same for both antennas but the dimensions are different. This antenna coupled. usually easy to match on all-bands from 40 meters through 6 meters with good antenna tuner. Think of the "Carolina" windom antenna (the modern version of the windom) as an "upside down vertical antenna", hanging down from its counterpoise strung (more or less horizontally) some 10 meters (or more) above ground. G5RV antenna: The G5RV is a doublet antenna with specific lengths that makes it suitable for operation on a variety of amateur radio bands whilst maintaining a good match. New G5RV 80-6 Meter Multi Band Amateur Ham Radio Antenna Falcon Products New G5RV 80-6 Meter Multi Band Amateur Ham Radio Antenna Operates on 10, 12, 17, 20 and 40 Meters without a tuner and 6, 15, 30, and 80 Meters with a tuner. The element can. G5RV Multi-Band Antenna by Louis Varney,. When feeding this antenna with an unbalanced line (such as coaxial cable), it is a good idea to use a 1:1 choke BALUN at the coax to feedpoint connection. Linearly Loaded Tee Antenna 17 27. Wire Antennas provide multi-band coverage with just one wire antenna. The G5RV has a reasonable SWR on 80, 40, 20, 15, and 12 meters. BUILD THIS MULTIBAND FAN DIPOLE FOR ALL BAND HF ANTENNA EXCITEMENT Here is a fairly simple and easy to build multi band horizontal fan type dipole that can be constructed for all band operation from 160 meters up thru 6 meters or even higher. In short, the Mystery antenna is a sky wire that incorporates the advantages of a 3 element collinear and the G5RV antenna. so today i noticed the G5RV jr antenna, it is 51' long and would fit just fine in the attic but i would have to figure out how to drop the ladder line into the house. 40m through 10m Antenna INTRODUCTION The MFJ-1778M antenna is a multi-band center-fed dipole antenna capable of 1500 Watts. As pointed out by G3UKV, the basic ZS6BKW antenna is related to the famous G5RV first published in the RSGB Bulletin in 1958 by Louis Varney (ref. Is this the performance king? CAROLINA WINDOM® 40 Compact™. Electromagne2c' Wave'Polariza2on' • Electric'and'magne2c'waves'are'at' right'angles'to'each'other' • Magne2c'wave'dissipates'within'a' few'wavelengths'of'antenna. Not a good multi-band antenna. It needs no tuner on 40m, 20m and 10m. Graphics G8ODE 22 Nov 2010 iss 1. Design Considerations Line Impedance, Z 0 - For 1:1 make equal to load and line impedance - For 4:1, make geometric mean of line and load impedance (e. It is an off centre fed dipole, with 10 feet of vertical radiator. The only disadvantage I have seen with the G5RV is all kind of intereferences. The G5RV HF Antenna By Pascal VA2PV. This is a voltage balun. Construction your own antenna is not all that difficult and certainly a lot less cost than buying one that will deteriorate the same way in the weather. The Carolina Version. A dipole is quite easy to construct. The following PDF files maybe of interest to you then, these are some of the better performing Multi-Band HF antennas they been around for years. It was originally designed to operate as a 3/2 wavelength center fed antenna for 14 MHz, but amateurs soon discovered it would offer reasonable performance on many other bands. Press one of the wires into the drop of glue and wait until it has set. 6 Below is the SWR plot for the initial 'retuned' antenna that uses a series L-C to get back the resonance on 160 meters. (In all fairness, my G5RV is a derivative version that is 6 feet shorter than the classic version. The MFJ-1778M consists of 52 feet flat-top fed with 17 feet of 450 ohm matching section ending in an SO-239 coaxial connector. Product Description. Adrian has taken the G5RV concept a few stages further, and achieved an almost perfect solution. He did actually suggest using winding the coax into an RF choke, though he didn't realize that this is, in fact, a 1 : 1 balun. Antenna Plots produced using MMANA-GAL Antenna Model Program - 10m plots omitted to save space. The G5RV won't work on most of 75/80 or on 30 or 15. The antenna is resonate on both bands and does not require an antenna tuner. Antenna Here is a Dipole You've probably heard this phrase in many QSOs. G5RV works on all bands for me except 160 meter but I have not made the feeder cross yet. Parallel Dipole construction. A G5RV designed for 20 meters will have more loss on any band (other than 20 meters) when compared to a dipole of the same size fed directly with balance feeders into a tuner. G5RV Multi-Band Antenna Three basic configurations. "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. Many people have found that the G5RV works on many other bands but the design, used at other than 20M, is a compromise. G5RV Multi-Band Antenna Hentenna - from N4UJW Horizontal Loop Antenna Construction Isotronant - PA0UNT Joy Stick Antenna K9AY Terminated Loop KC2TX's RX Loops KR1ST's Magnetic Loop Antenna Lattin Antenna MorGain 80/40 - IU8IHA MorGain 80/40 - IW5EDI MorGain 80/40 - PU2OKE (YouTube) MorGain 80/40 - PDF diagram Multiband Dipole Antenna. The sloper antenna is a slanted vertical dipole antenna attached to the top of a single tower. (when I had a G5RV, which is. rpt 08 Ln"Me to rpt tot CO g go to _l_pg O. Specifically the G5RV is a 102 foot dipole with a 31 foot feeder of 450 ohm transmission line. In short, the Mystery antenna is a sky wire that incorporates the advantages of a 3 element collinear and the G5RV antenna. Professor Brian Austin ZS6BKW remodelled and revised the dimensions of the antenna with improved results and ease of construction. 25mm ecw for a bifilar winding. In 1958, the RSGB Bulletin published his article, "An Effective Multi-band Aerial of Simple Construction. The G5RV and Kenwood work well together on all bands, even though it doesn't radiate out of my backyard on some of them. When feeding this antenna with an unbalanced line (such as coaxial cable), it is a good idea to use a 1:1 choke BALUN at the coax to feedpoint connection. On all bands but 20, the SWR on the coax is very high and therefore very lossy. CAROLINA WINDOM® 40 This antenna was used to set the 40 meter miles-per-watt world record. A G5RV designed for 20 meters will have more loss on any band (other than 20 meters) when compared to a dipole of the same size fed directly with balance feeders into a tuner. The G5RV HF Antenna By Pascal VA2PV. The only disadvantage I have seen with the G5RV is all kind of intereferences. The G5RV antenna is similar with the exception that a length of open twin wire feed line or "ladder line" is used to create a broadband feedline balun before connecting to the coax. The G5RV is an excellent all HF band antenna. 5 Band Vertical HF Fixed Station 10, 15, 20, 40, and 75 or 80 Meters. 5:1 or less. Whatis(aWindom(• Itis(an(offAcenter(fed(dipole(and(can(be(constructed(as(a(mulFband(antenna. And here are the elements for the antenna for the above SWR plot.