Inverted L Antenna For 80 Meters

A full counterpoise below the flattop suppresses horizontally polarized radiation. Coax to the triband antenna, and the power supply, are separate from the bundle. My minimum is roughly 1. So far I've come up with a 40-meter dipole feed with 1/4 wave of 450-ohm ladder line. W2PM MiniDiamond RX loop by OK1RP - part I. Carolina from Ark. GM0ONX 6 Band Inverted L Antenna MK3 In January 2005, a few days after replacing my mini quad with a Cushcraft MA5B, the west of Scotland was hit with a major storm. On 160m & 80m it acts much like a vertical with a counterpoise. PDF file, 180 KB (ANTENTOP-02-2010, pp: 48- 51) Download PDF File! HTML Version. I’m busy building an inverted L antenna. On 40 and 80 meters at 100 watts on an Icom 7300. DX-EE - "No-Trap" 40-20-15-10 meter dipole or inverted V. Well, fear not, as there is a compact solution to your MF antler woes, and it is an Inverted "L". Even an adequate ground system in that limited space was impossible. I have also used the antenna with an L-network tuner on 75, 40, and 20 meters with delightful results stateside. A 130 foot length of 12 gauge PVC covered stranded wire slopes up from the ground system to the 40 foot level of the 45 foot tall fiberglass flagpole (about 60 feet of wire length) and then proceeds about 70 […]. The 80 meter inverted vee is a common and classic antenna. The antenna is a center-fed half wave vertical with about 70 feet of vertical length with the remainder of the top and bottom of the antenna bent horizontal and parallel to each other. *For this article a vertical refers to a 1/4 wavelength, ground mounted antenna with 1/4 wavelength radials. End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. you can operate a loop over most of 80 and all of 40 meters. 87 - Capacity Tuned Folded Loop Antenna for 20m. The antenna has a full 300kHz bandwidth on 80m between 3:1 SWR points. I would full size 40 and 80 meter inverted 'V's but 160 band takes a bit more room. This antenna proves no exception to that rule. to about 900 miles on 80 m. This is particularly true at our fairly low 40 foot test height. Tuned by an SGC auto tuner. -An antenna that I have used frequently is a horizontal 5 band trap dipole. According to QRZ. Turn your existing 80-meter dipole into a broadband antenna by simply modifying the feed line. Fig 1 - Example of a 1/4-λ inverted-L antenna. Discover ideas about Ham Radio Antenna. This antenna can be configured as a Flat Top NVIS antenna, Inverted “V” for medium to long ranges, or a Sloping directional antenna. The vertical radiator is about 17 or 18 meters high, and the horizontal portion, which runs diagonally up hill, is somewhere between 25 and 30 meters long (I think). A 160 meter inverted L can be used quite successfully on 80 and 40. The third reason is a desire to teach basic antenna theory to the. Feed-point Connector for Inverted V Dipole Antenna Click here to get the instructions off his website. EZ file can be viewed -here-73, monty N5ESE. Vertical Inverted L for the 160, 80 and 40- meter Bands: by Nikolay Kudryavchenko, UR0GT. The feedline and antenna seemed to be in good shape. I built KB0ZZ's shortened 40/80 dipole and as I have it set up it works very well. These antennas can be set up as a straight suspended wire or erected in inverted V format. And on a small lot that SWR meter is very likely looking to a 160 antenna through an electrical quarter-wave-ish length of 50 ohm coax, 60, 80, 100 feet or 20, 25, 30 meters. Radiating elements of both antennas are made of 12 AWG stranded wire with THHN insulation. These are my SWR reading with 100 FT of RG-8 coax, 10-80 meter below 1. * The SWL Version of the Inverted "L" Antenna works well as an Omni-Directional Antenna. I have picked up the skeleton of a 4 element 10 meter quad ( cheers Dave M5 AFD) and intend to use it to make a 2 element quad for 20 meters and a 2 element quad for 10 meters ( which my dad can use ). My inverted L 77 feet high and 77 feet top section from 77 feet down to 45 feet and 3000 feet copperwires as radials is a serious DX antenna on 160/80/40/20 with the low angle of radiation and the MFJ 998 legal limit autotuner at the feedpoint. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. To get full performance out of it, you need to do some work. The antenna is inspired on the 'Battlecreek Special' design, but then limited to 80 and 160m (no 40m section). Overall length is 40 ft. Here are EZNEC patterns and gains for the illustrated Inverted "L" configuration: 80 Meter Pattern 40 Meter Pattern 30 Meter Pattern 20 Meter Pattern 15 Meter Pattern. The antenna displays a low feed impedance, which allow you to feed it directly with 50-ohm coax cable. Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to higher angle, regional type signals. I have also used the antenna with an L-network tuner on 75, 40, and 20 meters with delightful results stateside. I went back through the notes I made when I put up my inverted L, it is part of my HyGain 18HT vertical and the L transitions from vertical to horizontal at the 45' level via an added 40 meter trap (to avoid detuning the basic 18HT system) and a metal stub for additional vertical height. In the fall of 2007, I was able to install my first amateur radio tower. The larger the wire, the wider the bandwidth. Another antenna added from the antenna plan is a 160 meter ¼ wavelength inverted L. *For this article a vertical refers to a 1/4 wavelength, ground mounted antenna with 1/4 wavelength radials. Feed-point Connector for Inverted V Dipole Antenna Click here to get the instructions off his website. Just click on the appropriate link to see a table or figure and use your back button on your browser to return. The antenna displays a low feed impedance, which allow you to feed it directly with 50-ohm coax cable. Since I was not so smart in my younger years I tied the bottom of the sloper wire with string to a cinder block anchor positioned adjacent to a steel shed. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. So, the antenna radiation is predominantly vertical in polarization. Good for local contacts. The length of wire required at 1. My pole supports the wire close to the trap. 80 Meter Shortened Inverted-L Bazooka Antenna (0) Sale. It's also quieter on receive (picks up less QRN). At the home QTH it worked well as an inverted-L. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. tuning the antenna over the band. I cut about 35 foot of ladder line and hooked directly to my tuner. On the other bands, we obtain usable performance. -An antenna that I have used frequently is a horizontal 5 band trap dipole. Of course you must keep the end of the antenna high enough above ground, such that humans and animals will not be harmed by the high voltage on the end of the wire. Test Results for the Sloper vs Inverted-V Dipole on 80/40 meters Slopers are generally known to be good low angle DX antennas, while the inverted-V dipole is generally known to respond to higher angle, regional type signals. My tuner easily matches anywhere on the 4 bands. Since I removed my antennas for 40 and 30 meters, I also use the 80 inverted-L on 30 and the 160 on 40 with a 40 meter trap made by Unadilla. The DOUBLE BAZOOKA antenna design was first conceived as a radar antenna in the early 1940's for use by the U. Antennas, A (Moderately) Tunable 80 Meter Antenna (Mitchell N5RM), CQ 1991, Apr pg 50. The Inverted "L" is a 1/4-wave Marconi, fed against ground or a counterpoise such as radials. The other HF bands, 160, 60, 30, 17, 15, and 12 meters, were not ham bands at the time. • It was used as a multi-band antenna because when fed with ladder line (not coax!) it is easy to match the on any band from 80m to 10m • A G5RV used as a multi-band antenna should be fed with ladder line. It's also quieter on receive (picks up less QRN). My work for this step began with the construction of 8 custom coax cables to complete all of the connections between the antennas, electronics and hard-line feeders on the tower. After about 1000 miles the Inverted V signal declines rapidly being barely received by 1500 miles. Designed with corrosion-resistant aluminum tubing, this 32-foot tall antenna is very durable and attractive. Four inverted L shaped elements are tied together to form a cage antenna with a capacity "radial" system. On 160m & 80m it acts much like a vertical with a counterpoise. Another antenna added from the antenna plan is a 160 meter ¼ wavelength inverted L. at least 40 meters from all tall towers (over 25 meters tall) use much more than 40 meters of spacing for best performance A short inverted-L vertical is also an very good antenna as little as 15 meters vertical (but more is better…) supported from a tower or trees Use at least 32-64 shallow buried radials, 40 meters long. See updated video. Evolving from a simple end-fed Marconi for 80m, this antenna design was created by Mike G7FEK (reproduced with consent ). 22 Different Wire Antennas. My 160 meter antenna is an Inverted L. 16-18 An 80-, 40-, 15- and 10-meter vertical. W2PM MiniDiamond RX loop by OK1RP - part I. The antenna is a center-fed half wave vertical with about 70 feet of vertical length with the remainder of the top and bottom of the antenna bent horizontal and parallel to each other. I cut about 35 foot of ladder line and hooked directly to my tuner. About 135 feet is a good inverted L for 160, and will naturally tune to some other bands. That wire will be attached to a remotely tuned L-Network which is coax fed. 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. will it work okay to have the "horizontal" portion sloping downwards to an attach point say 15-20 feet above the actual ground. The 40/80/160 Meter Coil-loaded Inverted V Dipole Antenna See all details: Link The 40/80/160 Meter Coil-loaded Inverted V Dipole Antenna. Now if the Sun will just help out a bit, maybe I can reach a bit farther. 835 MHz is approximately 127 feet A quarter wavelength for 40. This calculator is designed to give the total length of a particular dipole (inverted Vees) antenna, or one side of it, for the frequency chosen. I went back through the notes I made when I put up my inverted L, it is part of my HyGain 18HT vertical and the L transitions from vertical to horizontal at the 45' level via an added 40 meter trap (to avoid detuning the basic 18HT system) and a metal stub for additional vertical height. I'll admit. Baluns: Choosing the Correct Balun. But performance is down about 8-12db on a dipole on. It's best to find resonance on any antenna, but I've also found that there are sweet spots that work for different other ham bands. See text for details. The utility pole was set 5 feet into the ground and has. However, with about 70 feet of antenna space (somewhat less if the inverted V configuration is used) a five-band (75, 40, 20, 15, and 10 meters) antenna can be erected. 5 m long and 22 m long were found to be ineffective on 160m. Both worked much better than I ever expected. Antennas for 160 meters on a standard half acre (~100 x 200 ft) suburban house lot pose quite a problem. 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. Radioddity QB25 Pro Quad Band Mobile Car Radio Transceiver V/UHF 25W +Antenna US Radioddity QB25 Pro: $94. For a compromised antenna system, it performed as well as my 80 meter inverted vee. The large diameter yields broadbanded coverage of the 80 Meter Band. PREVIOUS ATTEMPTS: 1; 80 meter dipole, coax fed. Dipole or Vertical? Tom Thompson WØIVJ Note: This posting uses hyper links extensively. The antenna is inspired on the 'Battlecreek Special' design, but then limited to 80 and 160m (no 40m section). The capacitor between the antenna and radial junction is replaced with a tapped coil. I'll admit. JA1OYY Mori's all band wire Yagi Home Made Antennas-JA1VKV Hide's 2el. An Attic Coaxial-Cable Trap Dipole for 10, 15, 20, 30, 40, and 80 Meters John DeGood, NU3E nu3e@arrl. OCF Dipole 7 band 80 -6 Rick on 27th Mar 2018 You are not going to find a better antenna than this one. On 160m & 80m it acts much like a vertical with a counterpoise. Changing coils is impractical. The vertical radiator is about 17 or 18 meters high, and the horizontal portion, which runs diagonally up hill, is somewhere between 25 and 30 meters long (I think). The classic Butternut HF2V vertical antenna operates on 80 and 40 meters. The trapped vertical was a bit of an odd creation. A number of hams have earned their 160-meter DXCC while using simple inverted-L antennas. 79 - Wire Ground Plane Antenna. Since I removed my antennas for 40 and 30 meters, I also use the 80 inverted-L on 30 and the 160 on 40 with a 40 meter trap made by Unadilla. A second advantage is the antenna's simplicity for a 4:1 frequency range with the bi-directional characteristic. The main category is Antenna for 160 meters band that is about 160 meters band antenna. Formula Dipole total Length = Amount / frequency Each leg of the dipole = Dipole Total Length / 2 Inverted Vees total length = ( Amount / Frequency ) * Percent Each leg of the Inverted Vee = Inverted Vees total length / 2 Where, Full Wave = 984 Half Wave = 468 Quarter Wave = 234 This tool will help you dynamically to calculate the total length of a dipole inverted V antenna. The length of wire required at 1. A Top Loaded Vertical on 80/160 • Split the difference and load a Tee or inverted L on both 80 and 160 (w/tuner) - 90-100 ft is 3/8λon 80M, 3/16 λon 160M - 160-170 ft is 5/8 on 80M, 5/16 on 160M Radial Systems • Provide a return for the fields and currents produced by an end-fed antenna • The earth is lossy, burns transmitter power. I should arrange it in inverted "V" for reasons of space. While 1/8th wave works reasonably well, better coverage is obtained if the antenna is mounted at about 1/20th wavelength above ground. All Band Sloping Inverted L Antenna by LA1IC. Inverted L Antenna 40m band. This worked lots better than using my 80 meter dipole as a "T" antenna. By switching between two net- works, a separate CW and PHONE match is possible. Below about 90' overall wire length, the antenna becomes essentially a 40-meter-and-up inverted-L. Because I live in a condo, I can only put up the antennas after dark. The end result is an end feed broadband shortened Inverted L antenna. It's a great HF antenna for the ham radio operator with a smaller backyard! The. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). The wire for this part of the antenna is 12 AWG stranded copper with insulated coating. The design procedure for the L net- work is to estimate (or measure) the im- pedance at the transmitter end of the coax. Improve Antenna 80 and 160 meter, by K1KI; Inverted L Antennas By Arnie Coro (CO2KK). Antennas, A (Moderately) Tunable 80 Meter Antenna (Mitchell N5RM), CQ 1991, Apr pg 50. (The coax shield and conductor connected together at the transceiver. In fact, a few years ago, I suggested the L-antenna as a workable simple solution to needs on 10, 6, and 2 meters to communicate with stations using antennas that are horizontally and that are vertically polarized. 160 Meter Inverted-L Bazooka Antenna- A DOUBLE BAZOOKA antenna is an extremely broad-banded Half Wave Antenna that can operate efficiently across an entire Ham band with little change to the SWR. I needed a cheap and relatively unobtrusive solution and I found one in Len Paget's (GM0ONX) design for an inverted L. 835 MHz is approximately 127 feet A quarter wavelength for 40. Shorter antennas--down to about 90' overall wire length can be built and used on 80 meters. And yes you can bend any half wave antenna (dipole or end fed within limits) into a V, Inverted V, vertical or inverted L to name a few. This will vary based on the construction of your 43-foot vertical, its proximity to other objects, etc. A 130 foot length of 12 gauge PVC covered stranded wire slopes up from the ground system to the 40 foot level of the 45 foot tall fiberglass flagpole (about 60 feet of wire length) and then proceeds about 70 […]. That turned out to be really useful as to do this I had to pull the bundle back and forth several times to get everything right. As a consequence, the Inverted L Antenna-which is a compromise in height, cost, and coverage-was adopted. A such low loop will be a cloudburner on 160 and 80, but will work multiband. This antenna works in high frequency range. My pole supports the wire close to the trap. I asked him about the antenna and was told that it was a 160 meter 3/8th wave, inverted 'L' antenna. I have used my 160 inverted L on 40 to good affect. It consists of two crossed inverted "V" dipoles positioned at right angles to each other and is supported at the center by a 15-foot mast. 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. 82 - 300ohm-Ribbon Dual Band Dipole. When I completed the project, I grounded the antenna and I am also using a counterpoise system that I had already. Does a 160 antenna (Inverted L) also work well on 80 meters and 40 meters for working DX?. The simple antenna was a single. I researched the heck out of this. Planning a dual band inverted L for 160/80 meters Modeling a quarter wave inverted L antenna for the low bands. , extreme low or high impedances) at the tuner end, on all bands. The inverted-F antenna was first proposed in 1958 by the group at Harvard led by Ronold W. The 80-meter antenna is a 130-foot dipole, fed in the center with 70 feet vertical and 30 feet horizontal 10 feet off the ground and 80 feet off the ground. The center-fed inverted-L has the potential to be a quite satisfactory all-band wire antenna suited to certain environments. Optimize your performance on 80 & 40 meters. Vertical T models Than I compared three of the inverted L models with the corresponding vertical Tees, with the. However, Beverage antennas are generally about 500 ft long. Most of us have always considered 160 meters to be limited to those with miles of open range and super tall towers. PDF file, 180 KB (ANTENTOP-02-2010, pp: 48- 51) Download PDF File! HTML Version. I’m busy building an inverted L antenna. This is 160 meter band, optimized for the CW-band. Inverted Ls for 160 and 80 meters Pros and Cons of the Dual Band Inverted L Antenna. 81 - Inverted-L for 160m. There are numerous reasons why people shy away from trying to put up a good antenna for this band:. 00 80m Shorty Double Bazooka Antenna (0) Your Price: $142. Another antenna added from the antenna plan is a 160 meter ¼ wavelength inverted L. The quality workmanship is far superior than others. DX Engineerings 300 ohm line (VF=0. The antenna had been lying dormant in my shack as I was using the original 80/40 meter W3DZZ and so had no use for it. In the evening when most of us have time to relax and enjoy a little time on the radio, the higher frequency bands are either dead or very crowded. But I wanted to cover both 3575-3580 and 3600-3610 kHz. Later, while reading an old antenna book I realized that my Inverted-L, being a quarter wave and worked against an RF ground was known as a Marconi Antenna. It works, with my 989d tuner and al-811 amp on 10 Meter to 80 Meters bands (And 160 too). antenna system to the FCP and isolation transformer is a common report that the antenna is quieter afterward. After extensive testing with WSPR on 15 20 30 40 80 and 160 meters I found this antenna to be equal and in some cases superior to my Wellbrook low noise receive loop. I decided to hoist an 80 meter inverted vee to the top of my tower, and use it for local ragchewing communication, and, it would also provide a comparison antenna for the vertical array. I have also used the antenna with an L-network tuner on 75, 40, and 20 meters with delightful results stateside. For emergency and field operations, the 1-radial inverted-L may be usable from 80 through 10 meters. 160 METERS ANTENNA 160 METERS ANTENNA (67) Antenna for the Low Bands 80 and 160m. communication on 75 Meters was started with a dipole at approximately 30 feet. My L-antenna against the night sky. Presentation Summary : 40 and 80 meter dipoles and a 160 meter inverted-L. inverted-L and an erect L. The resource is currently listed in dxzone. A travelling wave antenna, used in high-frequency band is an inverted V-antenna. It's a great HF antenna for the ham radio operator with a smaller backyard! The. 5 foot level off at a 90° angle to form the flat portion of the inverted L. Radioddity QB25 Pro Quad Band Mobile Car Radio Transceiver V/UHF 25W +Antenna US Radioddity QB25 Pro: $94. The utility pole was set 5 feet into the ground and has. A conventional coax-fed, half-wave dipole doesn't provide a low SWR over the entire 80-meter band - an inconvenience for those of us who like to operate phone and CW on that band. I've run an half wave inverted L on 75M and it was very effective. PREVIOUS ATTEMPTS: 1; 80 meter dipole, coax fed. Dipole Antenna Calculator. Time will tell how this effects local Tx/Rx on 80/75 meters however DX should improve some. The antenna is calculated for a specific length, usually 1/4 wavelength. This tower supports ropes for 80-meter antennas, and very long ropes that support four 1/4 wave tall vertical elements for a 160-meter four square. While primarily designed for the 80/40/20 meter bands, this antenna also works on 17/12/6 meters. The whole idea of operating on 160m started as curiosity. The trap is placed at approximately the 31. In order to select the better. performs well, but is "a cloud burner," good for local contacts within 500 miles. Conclusion. 40M/80M Trap Dipole -- From QRZ ; 80-40 meters vertical +160 meters by EI7BA ; A Hairpin Match for the 5-element Tonna; A Long-wire Aerial for Six Metres; A Practical Low Band Antenna; All-Band Center-Fed Inverted-L by W4RLD ; Antenna combination loop/dipole, by KB9MZ; Antenna design article collection KB4YLY. I decided to hoist an 80 meter inverted vee to the top of my tower, and use it for local ragchewing communication, and, it would also provide a comparison antenna for the vertical array. Building a Simple Top Band/80/40 Meter Antenna " The Inverted L for 40m/80m is shown below is essentially one half of a W3DZZ dipole fed against ground using one. However, gain is reduced. Shorter antennas--down to about 90' overall wire length can be built and used on 80 meters. How to build a mono band 80 meter 1/2 wave wire antenna. 5 foot level off at a 90° angle to form the flat portion of the inverted L. After mounting the TRAP's to 160 meter, the 80 meter band had a little change. I’m busy building an inverted L antenna. Vertical Inverted L for the 160, 80 and 40- meter bands. As with all trap dipoles, this one has less-than-ideal bandwidth due to the load- ing effect of the traps. 20 Meter Ham Radio Dipole Inverted V Complete Wire Antenna Kit 1500 Watt RW-DP20. GM0ONX 6 Band Inverted L Antenna MK3 In January 2005, a few days after replacing my mini quad with a Cushcraft MA5B, the west of Scotland was hit with a major storm. The solution was an 80 Meter Inverted L it performes better than the S9 vertical does for 80 meters. inverted V, inverted L or in slope, offering in that case some. I had a 1:1 balun and a 1:4 balun in the parts box. This simplified arrangement has several advantages, including a shorter ground distance between the ends. The radials should always be the same length, but I have found that you can vary them about,. It has one set of 40m traps, and works 80, 40, 20, 15 and 10. I'm most impressed with the 80 meter Half-Wave End Fed vertical/inverted-L/longwire (you decide what it is!) It tunes form 80 - 10 and seems to do really well 80 -20 meters. 66' 15, 17, 20, 30, 40, 60 meters 88' 20, 30, 40, 60, 80 meters The chief advantage of the broadside doublet is that you always know the directions of your radiation or your most sensitive reception. 500' 3/16" 100% Dacron Polyester Antenna Support Rope, Dipole Inverted V, L Wire. • The G5RV was originally designed as a 3 /2 antenna for use on 20 meters. A conventional coax-fed, half-wave dipole doesn't provide a low SWR over the entire 80-meter band - an inconvenience for those of us who like to operate phone and CW on that band. At a recent S. Inverted L Antenna 40m band. During the PACC 2013 I used this antenna for 160 meters. Despite this, with the antenna tuner, I managed to work with an acceptable SWR, 1. I have picked up the skeleton of a 4 element 10 meter quad ( cheers Dave M5 AFD) and intend to use it to make a 2 element quad for 20 meters and a 2 element quad for 10 meters ( which my dad can use ). I don't know. Both antennas have ceramic egg insulators which connect the ends to Dacron rope. Length L(feet) = 468/f(MHz). Unless you can get it up 60 feet or better, you'll mostly be NVIS. net Abstract A coaxial-cable trap dipole antenna installed in the attic provides a surprisingly effective solution to HF operation on the 10, 15, 20, 30, 40, and 80 meter amateur bands at a QTH with restrictive covenants that prohibit outside antennas. DX Engineerings 300 ohm line (VF=0. I’d really like to get DXCC & WAS on 160 meters. Previous to the inverted L, I tried a few ideas, some of which I am sure others have attempted also. But as the time has passed, last week I felt like a change so I dismantled the original W3DZZ for a serious service which it desperately needed and have replaced with this Inverted L W3DZZ. My tuner easily matches anywhere on the 4 bands. 5 in the 80 meter band. Going about 10 meters up and 10 meters horizontal. One separate dipole for each band. This left 30 meters but I had never built or bought an antenna for this band. 39 dBi as compared with 6. END FED INVERTED “L” ANTENNA FOR 160 – 80 – 40 METRES 1. 20 Meter Ham Radio Dipole Inverted V Complete Wire Antenna Kit 1500 Watt RW-DP20. I also intend to feed the antenna in a T configuration, running as a 1/4 wave end fed on 160, and a 1/2 wave on 80 meters. shack is to use a small L-network at the transmitter end to set the match (center feed). 5 m between 20 m trap and 40 m trap and 11 m between the 40 m trap and the end of the antenna. Unless you can get it up 60 feet or better, you'll mostly be NVIS. I have used my 160 inverted L on 40 to good affect. I have it up about 50-55 feet between 2 trees, ladder line drop down and makes a turn right into my shack. It has one set of 40m traps, and works 80, 40, 20, 15 and 10. If you want 75 Meter operation make it 57 ft long. 16-18 An 80-, 40-, 15- and 10-meter vertical. Double-L Antenna For 80/160. It's an 1/8 wave vertical on 160 meters also. This feature is not available right now. For antenna including 20 meter band click here. Overall length is 40 ft. I am impressed with the performance but to be honest with you my 40 meter Inverted-V sometimes does better but then again sometimes it does not. This simplified arrangement has several advantages, including a shorter ground distance between the ends. Think of it as an inverted L fed against an L. 00 80m Shorty Double Bazooka Antenna (0) Your Price: $142. 468 ÷ freq (mHz) = Length (feet). The full details were printed in the Practical Wireless magazine several years ago and PDFs are available for download from Len's website. My only reason to operate 80 meters is to contact hams on the west coast; stations I might not run into when operating the higher bands. MMANA File. This would become my primary 40 meter antenna, and, I could take down my phased delta loops. I've had it for about 4 years and haven't had. Full or near full size inverted L antennas for 160 meters are well accepted by top banders and even serious DX expeditions. I earned WAS on 160 meters from Utah running 100 watts to an inverted L antenna. optional kit available 40 meters. In fact, a few years ago, I suggested the L-antenna as a workable simple solution to needs on 10, 6, and 2 meters to communicate with stations using antennas that are horizontally and that are vertically polarized. Toss your EFHW over a high limb for an inverted-V, raise the far end high for a powerful sloper, or even go vertical with an inverted-L. The 80-meter antenna is a 130-foot dipole, fed in the center with 70 feet vertical and 30 feet horizontal 10 feet off the ground and 80 feet off the ground. Please note: Not all unblock requests will be successful as it is dependent on how your IP address is being blocked. The antenna works on the bands as advertised with low SWR. Now if the Sun will just help out a bit, maybe I can reach a bit farther. I have another general purpose antenna to cover Eastern Canada and Europe - an inverted "L" end-fed wire - which I can use on 160 meters to 10 meters, using an LDG automatic antenna tuner. I have used this by it self and it worked great. 80 meters is brought into resonance by starting with a 25 foot piece of wire. The antenna can be installed in an inverted V configuration keeping in mind that this design changes the feedpoint impedance and will tune differently. Since I was not so smart in my younger years I tied the bottom of the sloper wire with string to a cinder block anchor positioned adjacent to a steel shed. Of course you must keep the end of the antenna high enough above ground, such that humans and animals will not be harmed by the high voltage on the end of the wire. The main category is Homemade projects for 80 meter Antennas that is about Antenna projects for 80 meters band. Comparison to an inverted-vee The simplest alternative to this antenna is a loaded inverted-vee with leg configuration similar to that of the half-sloper wire element. Inverted L is the top line. While this certainly was a huge improvement over my humble Butternut multiband vertical, my new tower had a major shortcoming a lack of antennas for the low. Think of it as an inverted L fed against an L. Both antennas have ceramic egg insulators which connect the ends to Dacron rope. Therefore, if a pole 60 ft. I chose this as my first antenna. The elevation at 40 feet is a small fraction of an optimal 130 foot half-Wavelength Height so the signal is mostly reflected upward in an oblong shape. So, I decided that for this winter, the vertical would become a dedicated 80m antenna. On 160m & 80m it acts much like a vertical with a counterpoise. Since I removed my antennas for 40 and 30 meters, I also use the 80 inverted-L on 30 and the 160 on 40 with a 40 meter trap made by Unadilla. An inverted L is a bent quarter-wave Marconi vertical fed against a system of surface, buried, or elevated radials. This would be especially use- ful on an 80 meter antenna. Shown here is an Inverted-L with its long leg sloping to the ground. It's an 1/8 wave vertical on 160 meters also. 79 - Wire Ground Plane Antenna. The main category is Homemade projects for 80 meter Antennas that is about Antenna projects for 80 meters band. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. Grounded Loop Antenna with an option for configuration as an Inverted U. Inverted L is the top line. I’m busy building an inverted L antenna. The Inverted L over FCP at HC1PF. No sunshine and about 43 degrees! Oh well, still nice enough to get outside and play with my QRPGuys No Tune End Fed Half Wave Antenna. While this certainly was a huge improvement over my humble Butternut multiband vertical, my new tower had a major shortcoming a lack of antennas for the low. For example, a dipole antenna for the 80 meter band requires a ground length of about 140 feet (43 m) from end to end.