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 Center-Loaded Off-Center-Fed Dipole (CL-OCFD) was invented and first described by yours truly, Serge Y. TAK-tenna 40 to 10 meter Multiband Antenna. Cebik - W4RNL. "Hi Jim VE3DDY, you created a trapped vertical inverted L, It's an ok antenna but not my antenna. - 160/80/40 meter band - trapped dipole - 2007. However, they don't shorten the 80m section of the antenna. The Hustler® 5-BTV is a five-band trap vertical antenna. Guying Instructions for the 12m Spiderpole This document shows the standard guying instructions for the 12m Spiderbeam fiberglass Spiderpole. The larger the wire, the wider the bandwidth. Hello Mike, indeed a earth electrode antenna is not a beverage. The typical bandwidth is: 160M - 20kHz • 80M - 40 kHz • 40M - 300 kHz. SKF HR\ANTENNAS 94 07 01 n/a 1. 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. 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. The Comet H-422 is a 4-Band (10/15/20/40m) rotatable dipole antenna. and simple to install transmitting antenna and am thinking an inverted L would fill the bill. The second antenna is an upside down U, roughly 40' vertical on each end, 260' horizontal. 6-BTV Antenna pdf manual download. Only one center support is needed and only one coax is used to feed this antenna. that would help me build a 80/160 trap dipole. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. The World Ranger Dipole gives bi-directional patterns and rotatable convenience. This vertical antenna has no lossy traps or coils to burn out. 53 - All Bands Antenna. Evolving from a simple end-fed Marconi for 80m, the idea was to use the opposing. 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. Tagged Co-ax antenna trap, co-ax trap, coax trap, coaxial cable trap, trap dipole. 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. Test/Site Conditions for our Quarter Wave Sloper vs Inverted-V Dipole Because of the above stated variables we wanted to test these antennas over the. 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. 3 turns for the inner winding and 13. View the manual for 6BTV Bandwidth at it's broadest! VSWR 2:1 or better at band edges on 10-40 meters. A half wave antenna in free space fed on one end has an impedance of a couple thousand ohms. 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. If you want 75 Meter operation make it 57 ft long. Trap antennas can usually be designed to work well with two or three different HF bands, and designs combining fan and trap dipole features can provide more, with some trade-offs in efficiency and performance. Although it’s possible that some of it is coming down the coax, I really suspect it’s simply due to the antennas being so close to the shack. The Pacific Antenna Dual Band Trap Dipole kit provides a lightweight, portable trap dipole. 59 - Loop Antenna for 10m. Spec sheet, Manual. Collinear Trap Antenna. Again, my conclusions are based on the characteristics of my QTH. power load 1000 W SSB/CW (300 W at 40m). 6-BTV Antenna pdf manual download. W-8010 W-735. EFHW featured in "Stealth. In theory a 10m trap would end a 10m antenna at a 1/4 wavelength and allow another short section to resonate on 11m but in the real world the two bands are too close together for that to work. 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 covers the 80 meter through 6 meter Amateur Radio bands and can handle up to 100 watts SSB, 25 watts digital. Diamond's new CP5H is a five band (40M, 20M, 15M, 10M and 6M) trap vertical antenna with trap radials. 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. Resources listed under Antenna Traps category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. • 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. CrankIR is a high-performance on-the-road 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. After the trap there is about 10 meters of wire making one side of the antenna 30 meters long. 80m overall length - 134' or 67' per side. 6MHz * Power rating 400W * Totally encapsulated * Copper wire ends * Ideal for making 80/160m trap dipole etc. You can get almost the same effect as a thick wire by using a number of wires in what they call a cage. 2 φ10 M42002 Hat M42008 Hat ring M42011 ・Description ① The KV2 is a dual-band. This matchbox is good for this type of antenna. As with all antennas, trap antenna adherents claim they get good results--and indeed they do. The antenna worked as planned and is fed through a 1:1 balun. Our motorized antennas and stainless steel mounts are designed with the most avid HAM radio operator in mind, as well as commercial applications. They enjoy the luxury of turning on the radio and jumping right on the air—without squinting at an antenna tuner’s SWR meter and twisting several knobs. 6 pounds, makes it very manageable during the installation process and will allow for a simple mast solution. Copper oxide is not a good conductor and as copper wire corrodes, the antenna's losses increase causing a decrease in efficiency. The size of the antenna makes a Half wave length on 80 meters, and with the traps a half wave on 40m with a SWR (standing wave ratio) of 1:1-1. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. The "missing" 12m are substituted by using traps. Multi-band Trap Dipole. Welcome to Mosley-Electronics. Here are the comments from an email from VE6BP concerning his success with the Lattin 5 Band Antenna years ago. The main category is About antenna traps that is about Antenna traps. 80 meters is brought into resonance by starting with a 25 foot piece of wire. Click on Calculate and the optimum length for that combination will be displayed in feet and inches. On 80m the trap is mostly a resistor, or better a lengthening (or loading) coil so that you can shorten arm 2 until the SWR of the antenna becomes acceptable for 80m. TRAP-dipole - the W3DZZ antenna for 40 and 80 meter band - updated nov. My goal is to build a Field Day dipole for 40, 20, 15, and 10 meters (the club already has 80m covered). 112 - Novice Vertical Antenna for 80m, 40m, 15m, 10m. Options for 80m antenna - tried twice to tune 80m dipole unsuccessfully. ) - Other (longwires. NEW Newtronics Hustler model 6BTV 6-band vertical base station antenna. 200 zs6dn wingate pk s. The SWR will be well over acceptable levels without a tuner but will be tunable on both bands without too much effort. TRAP DESIGNS The Importance of Good Trap Design An antenna trap can be described as being an application of a resonant circuit. Short Dipole Antenna for 40m - 80m - 160m 31 51. 2 Antenna 80m 40m 20m 15m 10m; 2. The antenna consists of a 40/80m trap dipole and I have a 20m dipole off the same balun going at another angle. The short stubs on each antenna are strategically sized and located to permit more flexibil- ity in adjusting the resonant frequencies of the antenna. Although a combined antenna is a compromise over two seperate dipoles, sometimes the available space or supports prohibit such. The trap physical design will be substantially influenced by the design of the antenna using the trap. 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. 075wl high and antenna for upper bands from 0. >>> What is best to go for a 80m inductor kit or a pair of 80m traps? >>> Thanks >> well, 'traps' are usually used to cut off an antenna that is too long for >> the band in question, so that is probably not what you want. The Hilomast Trapped Wire Dipole Antenna is a compact and simply operated multi-frequency antenna, designed to provide up to 6 spot frequencies, (dependent upon channel spacing) with bi- or omnidirectional coverage in the HF band. that would help me build a 80/160 trap dipole. Trap antennas can usually be designed to work well with two or three different HF bands, and designs combining fan and trap dipole features can provide more, with some trade-offs in efficiency and performance. They run in those directions because of support issues with existing trees. My criteria means the whole antenna is lower than 6 feet above ground level. • 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. Provides low SWR and full amateur band coverage on 10, 15, 20, 30, and 40m band with 100KHz coverage on 75/80m band. G7FEK Multiband Antenna for a Small Garden - Construction Guide - PDF - 46 feet long and 24 feet high. 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. Pair of high power 80m traps 1000W CW/SSB Wideband 200w VHF base antenna. After operating like this for several months, I installed a relay between the top section nd the 40m section. Welcome to Mosley-Electronics. Wire antennas for Ham Radio. No antenna switches are needed, the RF knows where to go. 65MHz Lite Trap for 160/80m Inverted-L Antenna. All coils on this page will handle 2KW PEP. We’re talking about “reasonable” heights on a given band as discussed in the antenna literature. First, I could choose a trap antenna. 07 MHz Antenna Current Distribution and 3D Far Field Radiation plots. 6MHz * Power rating 400W * Totally encapsulated * Copper wire ends * Ideal for making 80/160m trap dipole etc. Simalar results on 40m. Made in Dorset UK. Traps can be used in two ways: 1) By using a trap resonant on the higher frequency that you want your antenna to work on, traps work as an effective isolator. Tagged Co-ax antenna trap, co-ax trap, coax trap, coaxial cable trap, trap dipole. The tuning of the traps is somewhat critical, so you do need test equipment for this project. The brand name of the 5btv antenna has been intentionally omitted, as I am getting comments from people looking for an entirely different subject. Every Antenna is cut to a precise length to accomodate that particular band. One side of the antenna (wire) goes up the 11 meter fiberglass pole and from the top towards the house. Trapped Inverted L Antenna for 40/80/160m This page describes my home made 'Trapped Inverted L' antenna, which is resonant on the 3 lower frequency HF bands 160m, 80m and 40m. The "X" marks the position of the traps. Notice that from the center point to the last tree (tree #5), the 80m dipole goes up a bit. For 80m this antenna should be elevated by 20m above ground in order to fulfill the 1/4 λ resonance case. You will then need to extend the dipole beyond the traps, adding sufficient wire to make it resonant on 160m. Trap dipole for 80m,40m,20m,15m and 10m. We will inform you by E-MAIL, in case for at least one of the set condition is fulfilled. correctBad SWR across the 80m Band 50Ωto 200Ω Current Balun 83 ft. My pole supports the wire close to the trap. The top section is about 110' long and is a 80M - 10M trap dipole. All in all it is still a simple dipole with only 2 traps, BUT the LC values of these traps, together with a quarterwave transformer for the 20m band, a halfwave transformer for the 80m band, and 2 pieces of wire 1. 52 - Center Fed-Zepp Antenna for 80m - 40m. Due High Impedance feed point, the antenna is less height dependent. Below is a schematic of the basic idea behind this antenna. I DID hear K4JPN at 0150 on 80m, but he couldn't hear me. Eight shallow-buried wires under the antenna, no longer than about 1/10th wavelength, in soil of average resistivity of about 150 ohm-metres, will have a loss resistance of the order of 10 ohms. an antenna tuner every time they change bands or frequencies. Simalar results on 40m. 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. Not something that's easily corrected. 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. Get great deals on eBay!. 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 other side of the antenna goes down from the feed point for about 8 meters. High gain, low SWR, and wide bandwidth keep the contacts coming in. Unfollow trap antenna to stop getting updates on your eBay Feed. Bought this aerial secondhand but unopened. Available in 20+40M and 17+30M versions Approximately 30% shorter than a full size dipole Weighs approximately 4 ounces. I bought the MFJ 17758 loaded 80/40 dipole not expecting a lot. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. My antenna is combined from the antenna for 80M band 0. My TX Antennae. layer traps. antenna exhibits significant NVIS properties with a single lobe. Another issue is using AM mode. I'm looking for any designs, tips, URLs, etc. Using Traps. This antenna performs well in restricted space areas. The antenna is supplied as a kit, comprising a Diamond BU-50 balun rated at up to 1. 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. The Folded 40m Concept. These antennas perform well in restricted space areas. 8MHz trap form is made from 3. 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. View and Download HUSTLER 6-BTV installation instructions manual online. By elevating the feed the earth loss is dramatically decreased, which means the antenna operates independent from the earth conditions and may be installed either on a roof or close to the ground. At 65 feet high the dipole has completed its transformation from an NVIS antenna to a good 40m DX. I bought the MFJ 17758 loaded 80/40 dipole not expecting a lot. They may not all be totally new designs but, I hope that they are an improvement on the originals. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. “Hi Jim VE3DDY, you created a trapped vertical inverted L, It's an ok antenna but not my antenna. Since 20m trap acts as a loading coil on 40 and 80 meters and 40m trap acts as a loading coil on 80m the antenna turned out to be much shorter than a full-size 80m dipole, and thus probably less efficient on both 40m and 80m bands. This is multi-band resonant antenna The performance characteristics is similar to a normal dipole and is driven through a 50 Ohm coaxial cable and features low SWR on all bands. Dualband Full-wave Loop Antenna for 80m-40m 34 58. Is there anybody who use > such a design > > for DX (meaning "in practice"). About Building Coaxial Traps The resource is currently listed in dxzone. 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. 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. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. Simalar results on 40m. 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. 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). 5 X 17 metres. A trap design guide is provided below to aid multiband dipole construction. The attic antennas can handle the other bands. The Western HF-10 multiband dipole was born out of Fred Western M0BZI's attempts at working 80m from a small garden. The larger the wire, the wider the bandwidth. The World Ranger Dipole gives bi-directional patterns and rotatable convenience. This time the current plot shows that the 40m trap is operating. After the trap there is about 10 meters of wire making one side of the antenna 30 meters long. I had to wrap the fiberglass pole with pipe insulation and then tape over it because when I went to tighten the clamps it sounded like I was crushing the pole. 40M Triangular Full-Wave Vertical Loop Antenna -- From W5DXP 40M/80M Trap Dipole -- From QRZ 40 Meter Delta Loop By PY4VE Via K4TX ShortyForty Dipole-- By W5VM Via K7MEM ShortyForty Dipole-- From FlashWebHost Sterba Curtain 40M-- from KB8PGW G5RV 40m Beam Antenna -- From W5DXP 40m Vertical Antenna for $10 -- From KG6IIR Verticals. The half-wave dipole is very simple to construct. The 5-BTV is designed to provide excellent performance on the 10, 15, 20, 40 and 75/80 meter bands. ) Measured Impedance File Added HI-Pass Corrector Network C = 448 pF L = 6. The Titan is the only vertical antenna marketed with total continuous coverage under VSWR 2:1 on 10m to 40m and 100KHz bandwidth on 80m. Installation of this product near power lines is dangerous. I brought the 80m vertical down and removed the top 5 feet including the capacitive hat and the antenna was perfect for 40m. “Hi Jim VE3DDY, you created a trapped vertical inverted L, It's an ok antenna but not my 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. Hustler 6BTV Vertical Upper traps with 40/80M on top. But performance is down about 8-12db on a dipole on. W3DZZ+5 Wire Antenna 10-80m, 1000 Watt Trap dipole for 80m,40m,20m,15m und 10m. A good trap antenna will provide multiband coverage and usually don't require a transmatch. Have you got a four-square in the big field. 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. A half wave antenna in free space fed on one end has an impedance of a couple thousand ohms. But, be careful. The past couple of days I've been reviewing literature on trap dipoles. 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. 80/40m Dipole. 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. Antennas 101 Presented by: combination of traps, linear loading and/or capacity hats, N8WRL 80m Four-Square Antenna. 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. 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. 80m Magnetic Loop Antenna. One of the real simple antenna to build and to erect is a vertical dipole. Omega match is used on 80M to achieve greater bandwidth. The "missing" 12m are substituted by using traps. When used in the V configuration it can be mounted as low as 10ft above groud. (I personally know of a real-estate challenged ham that worked 20M DXCC running 100 Watts with a single element quad loop nailed to the side of his house. These claims led to an interest in discovering to what degree these losses might be verified through modeling trap antennas. for 75/80 and 160 Meters a parallel wire located a few feet away can work on 80m traps or switches for dual band. 50 - Collinear Trap Antenna 51 - Short Dipole Antenna for 40m - 80m - 160m 52 - Center Fed-Zepp Antenna for 80m - 40m 53 - All-Bands Antenna 54 - All-Bands Dipole Antenna 55 - Multiband Z Antenna 56 - Multiband Dipole Antenna 57 - Five-Bands No-Tuner Antenna 58 - Dualband Full-wave Loop Antenna for 80m-40m 59 - Loop Antenna for 10m. The latter, while less intuitive. It was not invented for maximum efficiency. Their flexible mounting arrangement makes using them so easy!. They may not all be totally new designs but, I hope that they are an improvement on the originals. The actual trap designs are from GM0ONX webpage and is very easy to construct, it's literally 11 turns of RG38 coax round a 40mm waste pipe 100mm in length. TAK-tenna 80 to 6 meter Multiband Antenna. The goal that I set out was to design an HF antenna, with a VSWR of 3÷1 or less over the full bandwidth of as many amateur radio HF bands as possible, with a preference for the low- and the non-WARC bands. HF Multi-band Wire Dipole (Trap Dipole) Antennas Diamond W-Series W-8010 - 80m/40m/20m/15m/10m. In the final analysis I abandoned it and resorted to the HyGain Vertical and built an 80m dipole using 4:1 balun that I had purchased at the same time with the OCF dipole that was not much use. I added the Challenger to give me 80m, improve 40m, and give me some lower takeoff angles on the higher freqs. Dipoles only exhibit directionality once they reach 1/2 wavelengths above ground. The 1/4λ transformer ensures that the antenna is resonant in addition to a conventional W3DZZ on 14 MHz. Diamond Antenna W735 Wire Dipole Antennas arrive with all of the really hard work done for you! All of the wire lugs and connectors are in place and the traps are wound and ready to go. High gain, low SWR, and wide bandwidth keep the contacts coming in. Tilt-over base with 41 radials attached below. Total trap loss = 0. The top section is about 110' long and is a 80M - 10M trap dipole. pdf PDF-Dokument [178. Due High Impedance feed point, the antenna is less height dependent. 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. 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. Made in Dorset UK. 54 - All-Bands Dipole Antenna. After testing, the same antenna was constructed at KC4SIT's qth with similar good results. 2 uH (solid 14 AWG wire) C = 60 pF (coaxial style capacitor) 6 inches in length. 5MHz) and 40m (7MHz) but are a bit concerned about how much space you will need for an antenna. Similarly on the same antenna, the same trap operating off resonance as a load with 400 watts of 3. Super wide bandwidth means more time operating ,and less time stuck on a frequency your trap vertical is tuned for. The ULTIMAX-8040 broadband dual band double bazooka for 40 & 80 meters is a fantastic antenna using a newly designed "HY-Q" coax coils that gives outstanding broadband performance on both bands requiring only 103' feet of space. But G3XBM has good results with it on at least 160m and 80m. U (antenna tuning unit). For a while, I used a W3EDP antenna, but to be honest, results were mediocre at best, and since the tuner I used was in the shack, there was. One compromise antenna I have used is a trapped dipole. 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. A trap dipole antenna is a good choice if you only want to operate on two or three amateur radio bands and don't want to readjust an antenna transmatch (i. The W0BTU antenna covers more bands than either the G5RV or the ZS6BKW. There’s not much of a picture to take of the antenna itself. 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. Antennas 101 Presented by: combination of traps, linear loading and/or capacity hats, N8WRL 80m Four-Square Antenna. A trap vertical with 120 60' radials and 100' clear space around the antenna might have a quite different result. 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. For simplicity of operation, I want to avoid an outboard tuner. 05 Is trying to build a trapped dipole for 160/80/40 meter bands. Perhaps the biggest thing my station is missing is an 80m antenna. This article has intentionally not been a “hold my hand” style because everyone does things differently. The Hustler® 5-BTV is a five-band trap vertical antenna. A good trap antenna will provide multiband coverage and usually don't require a transmatch. My last antenna was a random wire up 60′ which I loved until it came down, and my yard is such that I really can't put up a new one until February (when the leaves are gone). Similarly on the same antenna, the same trap operating off resonance as a load with 400 watts of 3. Low Band Dipole Covers 160-80-40 meters with an overall length of only 100 ft. So I started considering building a shortened 160m dipole with traps for 80m. As with all antennas, trap antenna adherents claim they get good results--and indeed they do. Use as a dipole, inverted V or upright V antenna configuration. It clears about everything. 0 and 6 a 2. Making the 40 m traps The traps consist of 15 turns of insulated wire wound on a 42 mm OD PVC pipe 60 mm long. Diamond ® Antennas are sold through authorized dealers. 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. I read a nice article by A. Will easily handle full legal limit of power on SSB and CW. Instead of typical traps, Hy-Gain’s resonators are placed in parallel, not in series. Help--Vertical antenna for 80m. It is possible to cover the entire length with PVC but I think it is too unstable having 23' of PVC in the air on a tilt base. Coaxial Antenna The WA4EZN DOUBLE BAZOOKA Coaxial Antenna 40M shown in parenthesis SHORT center conductor to shield at these 4 points (40M Total: 66 feet 3 inches) 120 feet 29 ft 6 in (16 ft 3 in) 61 feet (33 ft 9 in) See DETAIL of CENTER Connections FEEDLINE (can be any length) DETAIL Center Connections BAZOOKA. The 5-BTV is designed to provide excellent performance on the 10, 15, 20. 2KW(Pep) for 80M 40M 20M 15M 10M. U (antenna tuning unit). 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. Trouble spots develop from the balun/feedpoint, through traps or resonator stubs, tubing joints, and capacity hats. the antenna short bevor final installation. The following image shows the layout of this antenna. This time the current plot shows that the 40m trap is operating. 6BTVs were designed as self-supporting verticals to provide efficient operation in the 10, 15, 20, 30, 40, and 75 or 80 meter bands. Hy-Gain and Mosley designed tri-band (20, 15, 10m) horizontal trap dipole antennas. This way there is no limit to how many bands antenna can be made. It worked well also on 20m with the use of an A. The 3/2 wave 15 meter antenna (really the 40 meter dipole) has significant gain and is about 150Ω resistive depending on height. Note: The Red & Blue colours are used simply to emphasise the vertical & horizontal components of the antenna current. A popular way of multibanding antennas is to install parallel tuned circuits, or traps. The antenna can be used without a tuner. 200 ja2igy mt asama, japan 28. The forward gain of such an antenna is approximately 11. 80m overall length - 134' or 67' per side. Insulated wire helps prevent this oxidation, increases antenna life and maintains HY-Performance! Coils: The coils used on our multi-band antennas are not traps but a form of isolation coil. It is called the EFHW-8010. I had a G5RV but I never seemed to have any luck with it. Guying the 12m Spiderpole. 80m inductor kit or a pair of 80m traps? 13. Using a program I wrote to calculate loaded antennas, I calculated the inductance of the loading coil and the best position for the loading coil. The 5-BTV is designed to provide excellent performance on the 10, 15, 20. The two bare wires from each half of the antenna are attached (soldered), one at a time to each side of the 2 conductor twinlead, ladder line, etc. The traps having been re-taped and cleaned are now ready to be put back with the antenna. Thus, the DX-CC is a much lower "Q" antenna than one that would be constructed using true traps! This allows the DX-CC to be broader in bandwidth than is possible with a trap-type antenna of equal size. All coils on this page will handle 2KW PEP. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Full Wave Loop Antenna 10M thru 80M G5RV Multi-Band Antenna by Louis Varney Hex Beam 20 thru 10M -- From K4KIO IK-STIC -- multi-band vertical dipole antenna used for quick set-up and quick band change -- From W2IK IK-STIC 2 vertical, all band, antenna, 25 feet tall, under 5 pounds! With a tuner covers the amateur radio HF bands from 40 - 10 Meters. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Coax trap 80m 2:1 VSWR ~210 kHz. 200 4s7b sri lanka 28. 1 WARC Band; 4 Referensi; 5 Pranala Menarik. Double Bazooka NVIS Antenna Calculator. 3 Antenna 40m & 20m; 3 Perhitungan Trap Dengan Software. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. This online calculator tells you how. 2kW, two air cored inductors wound on fibreglass formers, which function as traps on 40m and loading coils on 80m, plus lengths of 450 ohm ladder line and insulated copper wire to form the antenna elements. Half way in the air is an 80 meter trap. If there were no traps, the additional length of wire needed would be around 67'. Hustler 6-BTV 6-band HF Vertical Antenna is a 6-band trap vertical antennas that provide an omni-directional pattern. An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. By switching the relay in and out, I now had a 40m/80m vertical. The Western HF-10 multiband dipole was born out of Fred Western M0BZI's attempts at working 80m from a small garden. ) If you always wanted to try 80M, here's your chance. layer traps. The two bare wires from each half of the antenna are attached (soldered), one at a time to each side of the 2 conductor twinlead, ladder line, etc. Portable trapped dipole antennas 40 & 80 m Portable Trapped Dipole Sometimes the need to operate on two bands from a single antenna is required. The reflector wire improves the signal by about 3 dB over a single wire antenna. The SWR will be well over acceptable levels without a tuner but will be tunable on both bands without too much effort. ; power divides between R rad and R loss. Because the 80M’s antenna is short by construction, we must decrease losses as much as possible by: using quality ground plane system.