The Wire Size can range from 16 AWG to 12 AWG. They are made with the best materials and top of the line workmanship. The super antenna being a vertical antenna will not work well for NVIS not to mention how inefficient it is on 80 because of the short length and small coil. 5 foot level off at a 90° angle to form the flat portion of the inverted L. 80m Magnetic Loop Antenna. It is essentially a coax fed G5RV scaled for best performance on 25 meters. in feedingpoint. It is simply a half wave end-fed on 80m which will resonate on all multiples of that frequency, loaded with a small inductance near the feed end. The antenna features. Precisely tuned high-power traps, carefully selected element lengths, and proper spacing combine to make the A4S the preferred antenna for your HF work! This is the premium antenna with all the features that you want. In addition to those already contained bands from 6m to 40m, this antenna can be increased with a 80m option. Diamond ® Antennas are sold through authorized dealers. The antenna I am now going to describe is one that I designed some time ago. You can mount them high and away from the trees for better performance than a wire dipole. Welcome to the G6OHM Website - Antenna Designs - Amateur Radio,Projects,Antenna Designs, Double Quad Beam,2m & 70cm SSB, Ham Satellites,Card Making, Recipes,BNOS,Flowerpot Antenna, Angela's Page,EXPMR Radio,Raised Bed Gardeningsion,Fusion Radio. Erecting the antenna above ground (II) The first effect of placing a 1/4l vertical at ground level is that the mirror-image of the "missing half" has consequences on the feed point impedance that displays about half the impedance of a dipole, or about 35 ohms plus ground loss resistance. These antennas work very well. I used two antennas. On 80m I yakked with Gooby on 3945 and Jerry on 3902 more than once. Any 160 meter mobile antenna will have very poor efficiency, perhaps as low as. There are numerous reasons why people shy away from trying to put up a good antenna for this band:. ) Do not connect all together in the center!. 5 to 6 dB improvement as measured on 40m by Rudy Severns N6LF. Tagged Co-ax antenna trap, co-ax trap, coax trap, coaxial cable trap, trap dipole. Your station has specific requirements that may not match mine. I had a G5RV but I never seemed to have any luck with it. Over several decades, Barry Booth (W9UCW) and a group of fellow hams, have done an incredible amount of well-documented and systematic, repeated tests to assess the performance of various configurations and installations of short, loaded antennas. EndFed 1/2 Wave 800W 80M-10M Wire Antenna EndFed 1/2 Wave 800W 80M-10M Wire Antenna FULL HF Coverage, no tuner needed on most frequencies. There are several antenna designs that can be used for NVIS communication on 40m and 80m, but the one I keep coming back to is the DX-DD, from Alpha Delta. Connections are the same for the two antennas: radiator is connected to the same hot-end of the connector, and grounds are connected to the same mass. A really good one perhaps 1%. Unlike many END FED antennas on the market, this one does not require the Antenna Tuner to operate. Installation of this product near power lines is dangerous. If you listen to the DX activity on the Low bands, you'd be forgiven for thinking that you're wasting your time unless you have a 4 Square Array, 20 acres of Beverage antennae, a huge Amplifier, and a neck like an anvil. Their flexible mounting arrangement makes using them so easy!. my r7 is a 1992 and the 30 meter cap on top is a double , like 2 of them but connected at the bottom. com in 2 categories. The antenna worked as planned and is fed through a 1:1 balun. 5 across both bands. no traps, no special matching network, good efficiency. Due High Impedance feed point, the antenna is less height dependent. A quater wave electrical length of 75 ohm (3. I hang it in the tower up 9 meter, and the ends is inverted to about 4,5 meter over ground with an angel about 140 Deg. But, be careful. All information, images, and documents on this website are the sole property of Hygain Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Hygain. 5 m between balun and 20m trap, 5. If you use a tree as a tower it is really a piece of a cake. Collinear Trap Antenna 30 50. These antennas perform well in restricted space areas. CrankIR sets up quickly and allows you the flexibility to change bands even faster. Use Your Tower as a Dual -Band DX Antenna. TAK-tenna 80 to 6 meter Multiband Antenna. You might ask - why not a trap. Perfect for that weekend DXpedition or camping trip. I bought it when my SteppIR three element antenna trombone for 40m broke and I wanted to also try 80m which my lot couldn't support a fan or full sized dipole easily. ncdxf/iaru international beacon network. The antenna is supplied as a kit, comprising a Diamond BU-50 balun rated at up to 1. Coaxial Traps for an 80/40/30m Dipole TJ Campie. Stroobandt, ON4AA, in the year 2006. G7FEK Plans: Download the plans for the G7FEK antenna from G7FEK's website here or from this website here. This calculator is designed to give the horizontal length of a particular dipole (including Tees) antenna, or one side of it, for the frequency chosen. The RADIO WORKS' SuperLoop 80™ is a high performance, full size, full-wave, 80 meter loop antenna. The G0KYA EFHW – an end-fed half wave monoband HF antenna, plus two multiband versions (New!) A practical, cheap monoband or multiband (new!) vertical antenna that is great for DX and very cheap to build. The windings are in two levels: the number of inner windings is 12 turns, and 11 ¼ of outer turns. This design exercise resulted in a new kind of antenna which I dubbed Center-Loaded Off-Center-Fed Dipole Antenna, or CL-OCFD for short. All that is necessary is to assemble the pieces and hang it up!. Also shown in this drawing are the 80m traps/extensions - see details on this at the end of the page. TAK-tenna 80 to 6 meter Multiband Antenna. Guying the 12m Spiderpole. The 1/4λ transformer ensures that the antenna is resonant in addition to a conventional W3DZZ on 14 MHz. Traps are tuned circuits that act somewhat like automatically switched inductors or capacitors, adding or subtracting from the length of the antenna according to the frequency of your signal. The 3/2 wave 15 meter antenna (really the 40 meter dipole) has significant gain and is about 150Ω resistive depending on height. antennas by 10's of dB on this band. 6 pounds, makes it very manageable during the installation process and will allow for a simple mast solution. This time the current plot shows that the 40m trap is operating. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands" Erv Bratt. About Building Coaxial Traps The resource is currently listed in dxzone. Due High Impedance feed point, the antenna is less height dependent. For simplicity of operation, I want to avoid an outboard tuner. Construction of 80M’s antenna mechanically carries antennae for upper bands. use an antenna tuner (as recommended by the manufacturer). This is a dual band antenna that covers 80m and 40m. SteppIR DB-36 In the series of large antennas by SteppIR we offer two new models. One side of the antenna (wire) goes up the 11 meter fiberglass pole and from the top towards the house. Murray, KD1BL Author's Note: This article describes a 75/40 meter NVIS, but one could use the construction techniques to build just a 75. Coaxial Traps for an 80/40/30m Dipole TJ Campie. The antenna wire lengths before trimming are 5. That antenna works as a loaded vertical on 80m, with associated coil loss, narrower bandwidth and lower radiation resistance (= increased losses), plus a slightly contracted standing wave due to the coil (shorter effective length). It is a full size antenna on 40 meters and a shortened 80 meter antenna. I used two antennas. 8-MHz trap is shown without its protective electrical-tape wrap to show the details of trap construction. An older MFJ antenna analyzer is suitable though, and are usually easy to borrow if you don't already own one yourself, which is what I did. The RadioWavz DX (OCF) Windom is ideal for those of you who do not use a tower and beam. A half wave antenna in free space fed on one end has an impedance of a couple thousand ohms. As a result the antenna ‘looks’ electrically shorter than it really is. Due High Impedance feed point, the antenna is less height dependent. 5MHz to 51MHz). Posted by Hank Koebler on 30th Jun 2015. A quater wave electrical length of 75 ohm (3. 20 QSOs on 20 meters. I had a G5RV but I never seemed to have any luck with it. in feedingpoint. My Loop Antenna November 20, 2013 9 Characteristics of Small Loop Antennas for HF Operation • Coupling loop ≈1/5 diameter of main loop for good impedance matching on all bands • Antenna is narrowband, operating at resonance of loop L and tuning C • Radiation resistance in series with loss res. Some hints/tips on how to assemble nice COAX TRAPS ! Before we start to assemble our traps, here some general info as introduction : Coax traps are cheap, easy to assemble in a reproducible manner, very rugged, perfect for portable or permanent operation, on dipoles, inverted-V's etc. The antenna consists of a 40/80m trap dipole and I have a 20m dipole off the same balun going at another angle. 6BTV vertical with 17M add on kit. Unfollow trap antenna to stop getting updates on your eBay Feed. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. We got the antenna up about 85ft and put it in a flat top configuration. I hang it in the tower up 9 meter, and the ends is inverted to about 4,5 meter over ground with an angel about 140 Deg. Because the feedpoint resistance tends to be high, high efficiency is obtained with a modest ground electrode system. 80/40m Dipole. I have also picked up a 2nd hand Capco 80m / 160m magnetic loop that I need to get collected and I will fit this on T&K brackets on the side of the shack, the loop is 12ft diameter. View from back of house showing Tenna Mast with all antennas. The tap booklet comes with the traps. Available in 20+40M and 17+30M versions Approximately 30% shorter than a full size dipole Weighs approximately 4 ounces. net and other boards. correctBad SWR across the 80m Band 50Ωto 200Ω Current Balun 83 ft. It is called the EFHW-8010. The following notes show the design and construction of a Broadband HF Vertical antenna which does not require a tuner, and which is capable of providing moderate performance on all bands from 7MHz to 28MHz (reduced performance from 3. W3DZZ+5 Wire Antenna 10-80m, 1000 Watt Trap dipole for 80m,40m,20m,15m und 10m. I have searched the web and have not found any 80m/160m trap dipoles. Just "Turn the Crank", that's it! No fussing with changing traps, taps, or coils. View from back of house showing Tenna Mast with all antennas. I am sharing here the thought process and experimentation that I went through to arrive at the solution that best fits my needs. Antenna height = 43 feet AGL with the bottom about 3 inches above ground. Since not everyone has the opportunity for a beverage or a fence antenna like me it could be a nice experiment using a earth electrode antenna. For best results your antenna should be elevated by 20-25 feet, but you can still get good performance by mounting it on a pipe near ground level. Their flexible mounting arrangement makes using them so easy!. Because the 80M’s antenna is short by construction, we must decrease losses as much as possible by: using quality ground plane system. This is a dual band antenna that covers 80m and 40m. Build an effective dipole antenna that needs much less space by adding two loading coils. When an antenna that is one half wave length long has RF energy applied to it at its resonant frequency a standing wave develops on it. I hang it in the tower up 9 meter, and the ends is inverted to about 4,5 meter over ground with an angel about 140 Deg. Of the entire antenna can be mounted horizontally, it then works like a traditional multiband dipole. The slanted wire that runs from the top of the 80m trap back to the house angled down at an angle. G7FEK Plans: Download the plans for the G7FEK antenna from G7FEK's website here or from this website here. A quater wave electrical length of 75 ohm (3. 4 turns for the outer winding. The SWR will be well over acceptable levels without a tuner but will be tunable on both bands without too much effort. This online calculator tells you how. Trap verticals have been around for a very long time. Handles power up to 100W of RF. com Quality antenna systems by Mosley Electronics. 1 Antenna 80m 40m 30m 20m 15m 10m; 2. Wire antennas fed. Mouse-over any image to see it larger! Let's work through the design of a simple-to-construct low-cost antenna 'trap' - like the one pictured above - for the 40 metre band, i. Their flexible mounting arrangement makes using them so easy!. Unfortunately, their SWR curve is low over only a small portion of the band. 160- and 80-Meter Matching Network for your 43-foot Vertical - UPDATED Phil Salas – AD5X The popular 43-foot vertical is self supporting, not too obtrusive, and has higher radiation resistance than many popular trapped- or loaded verticals (increased radiation resistance minimizes efficiency-robbing ground losses). 8" in diameter x 5. your LISTSERV request "help 80m amp anomaly?" 14. I called CQ, S&P , more CQ's. Again, my conclusions are based on the characteristics of my QTH. Trapped Vertical Antennas] [Rotary Dipole Antennas] [Accessories] [Wire Antennas] [How to Order] [News & Info] [New Products] [Testimonials] [Other Links]. In fact I'm getting terrific reports on 80m with many stations in a net saying I have the best signal of the group. 80 meters is brought into resonance by starting with a 25 foot piece of wire. Use 75 or 50 ohm cable to feed the centre of the dipole. Back in 2011 when I built the W3DZZ trap antenna for 40 and 30 meters Len Paget GM0ONX who originally came up this particular way the W3DZZ is designed also came up with an inverted L antenna based on another W3DZZ design, I described it earlier in my blog (see the "my Blog" link below). antenna 6 to 10 feet off the ground will ever work particularly well. Trap dipoles have two huge advantages: they are multi-band, and they are shorter than full dipoles. By varying the length of the 450 ohm ladder-line feeding the antenna, we can achieve an SWR of less than 2:1 on all frequencies on all HF bands with the exception of the lowest part of 80m. This is also where I decided to attach the truss. The Folded 40m Concept. Some people use motor-driven capacitors to cover all of the band. Here is the trap dipole for 40 and 80m: This is how you make it: Next you go in the field to adjust the length of the arms to make it resonant at the…. Verkürzte Antennen-- Short Dipoles and Verticals for 160m & 80m -- by DJ9RB; Home Made Antennas from WE6W - Bazooka Antennas and more. 80m overall length - 134' or 67' per side. My first thought was to make an inverted L for 80m, but the far end would extend off my property and would increase visibility of the antenna, particularly in the winter when there are fewer leaves for cover. 200 4u1un united nations 28. The self-supporting DX-88 comes with stainless steel hardware for long term reliability and will withstand 75 mph winds without damage. Such a trap, utilizing a parallel resonant tuned circuit, offers very high impedance at or near resonance and simply acts as an insulator to effectively cut off the element to a length resonant to the band being used. The 3/2 wave 15 meter antenna (really the 40 meter dipole) has significant gain and is about 150Ω resistive depending on height. Have you got a four-square in the big field. 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. 5 X 17 metres. The antenna is up about 50' high. KW-80 80m Trap coils for Inverted Vees or Dipoles. - 160/80/40 meter band - trapped dipole - 2007. For similar results we urge the use of the Flagpole antennas with an outdoor ATU located near the base of the antenna to keep feedline losses to a minimum, however, this antenna will work with many indoor ATUs and even some rig ATUs (we have tested with the Flex-6700 ATU). Image #3 - This shows the center-point of the antenna, the choke, and the parallel dipoles. The 80m Lite Trap has finally become practical due to the design using relatively. Collinear Trap Antenna 30 50. September 2014. We're talking about "reasonable" heights on a given band as discussed in the antenna literature. A dipole is resonant on one frequency (and all odd harmonics), with a trap you can design it for more frequencies. 80m inductor kit or a pair of 80m traps? 13. This antenna includes the RM-80S resonator and the 4457-1 three blade spider assembly. The DX-88 handles maximum legal power on all bands, features low-loss traps and has a low angle of radiation for good DX performance. • Only 46 ft long x 24 ft high • Multiband operation including 80 meters without traps • Low angle of radiation is dominant on most bands (ideal for DX) • Enough High angle for short skip on 80m (local contacts) • Coax fed for convenience • Low visual impact. QRPGuys Wire Antenna Trap Kit – $15 Due to customer requests, QRPGuys is offering a universal lightweight wire trap kit for those who want to experiment with their own traps for wire antennas. This vertical antenna has no lossy traps or coils to burn out. Total trap loss = 0. 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. 07 MHz Antenna Current Distribution and 3D Far Field Radiation plots. 5 X 17 metres. 1 Antenna 80m 40m 30m 20m 15m 10m; 2. MFJ-2982 Feather Lite HF Vertical Wire Antennas are 31 ft. As a result the antenna ‘looks’ electrically shorter than it really is. SWR Bandwidth. Not something that's easily corrected. I chose 58' for Mid 80 Meter Operation. His basic design starting point was the half size G5RV, to which he added inductors on each leg. This design exercise resulted in a new kind of antenna which I dubbed Center-Loaded Off-Center-Fed Dipole Antenna, or CL-OCFD for short. Instead of typical traps, Hy-Gain’s resonators are placed in parallel, not in series. The RadioWavz DX (OCF) Windom is a off center fed (OCF) dipole antenna that exhibits outstanding performance on multiple bands typically with out a tuner. As stated,. OK thats rather unfair to the antenna, the reasons it was only up for a short time are two fold, performance wasn't what I had hoped for, but thats because of my lacking ground installation and the fact that I was hoping to get a quart out of a pint pot. drainpipe, and RG58 A/U coax - 15,55 windings, all counting is done by the program COAX-TRAPS. Spec sheet, Manual. For most multiband antennas, the current flows from the feedpoint, to the highest frequency first (10m), and out to the end point for the lowest frequency capable (80m). A 2-band 'No-Trap' Trapped Dipole For Small Gardens. A 40 meter trap is located at the top of a quarter wave 40 meter vertical. 8m High 1500W. Perhaps the biggest thing my station is missing is an 80m antenna. Steve Nichols G0KYA Contents 1. Options for 80m antenna - tried twice to tune 80m dipole unsuccessfully. - 160/80/40 meter band - trapped dipole - 2007. I have been using a GAP Challenger DX, (review here), for the past fifteen years, unbeknownst to me, and over that time, water had been slowly seeping into the tuning harness of the antenna. After testing, the same antenna was constructed at KC4SIT's qth with similar good results. 1 WARC Band; 4 Referensi; 5 Pranala Menarik. This is a dual band antenna that covers 80m and 40m. The 80m Lite Trap has finally become practical due to the design using relatively. If you feed enough power to the antenna - and with time - coils will heat up and melt the ice. Since I also have some desires on 80m it would be an advantage to build a wire trapped inverted L ala ON4UN's latest book, Chapter 9 sections 6. Its also convenient that the impedance of a half wave antenna repeats itself every 180 degrees, so a broad band matching circuit can work on multiple harmonics and give you more bands to operate with a good match to low impedance coax. Tuning procedure is described in the ARRL Antenna Book. The larger the angle of skip off the ionosphere, the larger the loss on the skip for any given propagation. Big 2 1/8" bottom section tapers at the top to 3/8 of inch for flexibility, strength and wide bandwidth. Based on the W3DZZ antenna, this Dipole proved to be very efficient without Antenna Tuner on 80m, 40m, 20m, 15m and 10m bands. 5m long for bringing in the resonance point on 15 and 10m, has allowed this dipole. 160 METERS ANTENNA (67) 40M/80M Trap Dipole -- From QRZ. Not sure if this is a problem. The Hustler® 5-BTV is a five-band trap vertical antenna. K5LAD's Assorted Ham Stuff "I can’t work 80 meters, I don’t have a good 80 meter antenna" How many hams have made a statement like the title of this piece? Quite a few, I’d be willing to bet. I used two antennas. Diamond W-735 Compact 80 – 40m Dipole. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. No mast in this context means no structure taller than a person. For most multiband antennas, the current flows from the feedpoint, to the highest frequency first (10m), and out to the end point for the lowest frequency capable (80m). So, you’ve just got yourself a licence or a nice new HF transceiver and are hoping to be active on the lower frequency bands of 80m (3. Unless you closely tune these bands to segment where you normally operate then the SWR may be unacceptable. To make a point, suppose I want a single antenna that works on most of the HF bands. Bought this aerial secondhand but unopened. The thicker a dipole wire is (relative to its length), the wider the bandwidth. Instead of typical traps, Hy-Gain’s resonators are placed in parallel, not in series. The latter, while less intuitive. TR-80 Watson Pair 80m Traps TR-80 Watson Pair 80m Traps * Pair of 80m traps resonated to 3. for 75/80 and 160 Meters a parallel wire located a few feet away can work on 80m traps or switches for dual band. They act like traps but. I currently run a Hustler 6BTV, had a 4BTV and Cushcraft AV5 trap vert also. 200 ve8at canada 28. The Folded 40m Concept. The trap antenna, whether a doublet or a one-sided vertical, was invented mostly to permit the operator to use coaxial cable as a feedline. The antenna above has been described by Nadisha, 4S7NR and may be of interest to anyone wishing to get on 80M (3. INSTALLATION INSTRUCTIONS HUSTLER 4-BTV, 5-BTV TRAP VERTICAL WARNING INSTALLATION OF THIS PRODUCT NEAR POWER LINES IS DANGEROUS FOR YOUR SAFETY, FOLLOW THE INSTALLATION DIRECTIONS GENERAL DESCRIPTION: The Hustler 4-BTV is a four-band trap vertical antenna providing an omni directional pattern. It looks just like a set of 3 home-brew trap inverted v’s. After operating like this for several months, I installed a relay between the top section nd the 40m section. QRPGuys Wire Antenna Trap Kit – $15 Due to customer requests, QRPGuys is offering a universal lightweight wire trap kit for those who want to experiment with their own traps for wire antennas. Use Your Tower as a Dual -Band DX Antenna. Traps also introduce a bit of loss, but that can be minimized with good trap design. The antenna tuning range is restricted to 1500 kHz - 1700 kHz to make it simpler to construct. Installation of this product near power lines is dangerous. per coil The size is approximately 1. Antenna impedance at the feedpoint is about 39 ohms on 80m and 60 ohms on 40m. One side of the antenna (wire) goes up the 11 meter fiberglass pole and from the top towards the house. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. However, NVIS antennas are located from 1/4 to 1/10 wavelength above ground. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. I don’t use 160m, but I’d guess that I’d probably end up triggering GFCIs at my house and my neighbors house on 160m. ) If you always wanted to try 80M, here's your chance. It is a high gain quad beam for 2M (144 – 146 MHz) band. In this video, Peter Parker (VK3YE) shows us how to make a simple, inexpensive trap dipole for the 40 meter (7 MHz) and 20 meter (14 MHz) amateur radio bands. The three 160m radials run northeast, northwest and southeast. The trap dipole and parallel dipole are options to provide resonant antennas on multiple bands without a tuner. Terminated Folded Dipole Antenna System: 10 Meters through 160 Meters commercial-grade performance, heavy duty construction, and top-notch customer service. G7FEK Plans: Download the plans for the G7FEK antenna from G7FEK's website here or from this website here. Antenna traps is a curation of 24 resources about , Low loss Wire Traps, Tuning Antenna Traps, Bootstrap coax traps for antennas, PA3HMP Antenna Traps, Building Coaxial Traps. An Improved Multiband Trap Dipole Antenna You need this—traps with lower loss, higher Q, increased power-handling capability and four-band coverage! By Al Buxton, W8NX This improved multiband trap dipole introduces a new trap design and a change in trap location. This article has intentionally not been a “hold my hand” style because everyone does things differently. W-8010 W-735. > > 73, > >. At 65 feet high the dipole has completed its transformation from an NVIS antenna to a good 40m DX. 5MHz to 51MHz). layer traps. 5 m) is used to match 50 ohm coax to the balun and antenna. • Use NEC to model antenna and predict inductance required to resonate the the antenna - or: Use Vector Analyzer to measure feedpoint Z of an existing antenna that's too short, export data to SimSmith and predict inductance • Coil winding formulas in ARRL Handbook are very accurate. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. The antenna features. I wanted an antenna on a top mount for my pickup, shorter than required for actual 6 meter 1/4 wave. Tilt-over base with 41 radials attached below. The length of wire beyond the trap depends on the two basic frequencies at which the antenna is designed to operate. i buffed the whole antenna. The design was based on trap coils of high-Q with inductance chosen to produce 80m sections that would fit in the available space. U (antenna tuning unit). The kit contains four trap pcbs, two antenna end connector pcb’s, four T37-6 toroids, two 68pF-500V capacitors, two 150pF-500V capacitors, 8′ […]. 'traps' are normally meant to cut up a big antenna into smaller pieces for user on higher frequency bands. 5/5click here to see their performance reports. For best results your antenna should be elevated by 20-25 feet, but you can still get good performance by mounting it on a pipe near ground level. View from garden Comet 422V rotary dipold for 10/15/20/40mtr. W-8010 W-735. TRAP-dipole - the W3DZZ antenna for 40 and 80 meter band - updated nov. 5 mtrs of wire. ) If you always wanted to try 80M, here's your chance. 5MHz) that have limited space available. Hustler 6BTV Vertical Upper traps with 40/80M on top. This is a top-loaded 80/40 meter vertical which replaced my Butternut once I installed a tower with a beam, and no longer needed a vertical to operate above 40 meters. QRPGuys Wire Antenna Trap Kit - $15 Due to customer requests, QRPGuys is offering a universal lightweight wire trap kit for those who want to experiment with their own traps for wire antennas. MFJ-2982 Feather Lite HF Vertical Wire Antennas are 31 ft. After the trap there is about 10 meters of wire making one side of the antenna 30 meters long. The antenna can be used without a tuner. If you want 75 Meter operation make it 57 ft long. The 40m trap was at approx 9m height, the 80m trap was at approx 15m height. The 6BTVs are designed for operation in the 10 15 20 30 40 and 75 or 80 meter bands. There are several antenna designs that can be used for NVIS communication on 40m and 80m, but the one I keep coming back to is the DX-DD, from Alpha Delta. QRPGuys Mini No Tune End Fed Half Wave Antenna is designed as a mini highly portable 80m-10m end fed half wave wire antenna, easily set up as an inverted V, horizontal, sloper, or in the case of higher frequencies, a vertical radiator. Collinear Trap Antenna 30 50. The springs running to the left and right in the picture apply tension to the insulators that are attached to the North and South legs of the dipole antenna. All information, images, and documents on this website are the sole property of Hygain Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Hygain. Precisely tuned high-power traps, carefully selected element lengths, and proper spacing combine to make the A4S the preferred antenna for your HF work! This is the premium antenna with all the features that you want. Looking for multi band diversity for your HF Radio Station? FT8 operators love this antenna for its instant agility to operate from 160-6M limited only to the speed of your antenna tuner. The shapes of the 6, 12 and 24 foot high antenna patterns differ only in gain, but maintain the same basic shape. SteppIR DB-36 In the series of large antennas by SteppIR we offer two new models. These antennas perform well in restricted space areas. I choose the Titan DX mainly based on the reviews on eHam. But G3XBM has good results with it on at least 160m and 80m. The HVU-8 was designed for those suffereing from antenna restrictions in mind. That antenna works as a loaded vertical on 80m, with associated coil loss, narrower bandwidth and lower radiation resistance (= increased losses), plus a slightly contracted standing wave due to the coil (shorter effective length). Below is a schematic of the basic idea behind this antenna. 17 µH The impedance vs frequency is measured C and L components were manually optimized in simulator. The design was based on trap coils of high-Q with inductance chosen to produce 80m sections that would fit in the available space. The Wire Size can range from 16 AWG to 12 AWG. This link is listed in our web site directory since Sunday Feb 25 2007, and till today "Building Coaxial Traps" has been followed for a total of 9997 times. Repeat for the next highest band, and so on. The trap physical design will be substantially influenced by the design of the antenna using the trap. Stroobandt, ON4AA, in the year 2006. Use Your Tower as a Dual -Band DX Antenna. WHY THE MULTIBAND HF FAN DIPOLE IS THE RIGHT CHOICE, IF YOU CAN ONLY PUT UP ONE ANTENNA. Antennae for the Low Bands. 07 MHz Antenna Current Distribution and 3D Far Field Radiation plots. Both traps have strong secure points for attaching wires.