20 And 40 Meter Vertical Antenna

Larry Banks, W1DYJ 1Notes appear on page 40. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. A 40 meter trap is located at the top of a quarter wave 40 meter vertical. Similar to the vertical, it works very well on 20 through 10 Meters but is a little too low for good DX on 40 and 80 meters. 60 foot ground radials Five eights wave Vertical is: 43. A kit of parts excluding adhesives is $35 including priority mail shipping in the U. You'll find that the 5/8 wave antenna's angle of radiation is just 16 degrees making it an even better dx antenna. G7FEK’s antenna was built from G5RV leftovers it looks a little like a small, off centre, G5RV. Leading North America Supplier - 20 Years of Innovation - Shipping Globally Please enter key search to display results. My first contact to Australia was on my 20 meter loop, so it has to be working great. In particular, we both were impressed with Harry's 20 Meter Loop Antenna-it's such a simple project and requires. The data is normalized to a 1. Works good using 20 watts into the East Coast and Ohio this morning. Detuning the tower on 40 is not an option since that would compromise operation of the 80 meters half-sloper antenna. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. On 40 and 20 meters, the antenna maintains a fairly consistent SWR of less than 2:1 (see Fig. I have tried a lot of different antennas over the years in efforts to increase the number of contacts made. com in 3 categories. 15 MHz) operating over average soil (conductivity = 0. At the lower end of the HF spectrum, the λ/2 height requirement for horizontal antennas can become cumbersome (even though a horizontal phased array may weaken this requirement by allowing somewhat lower heights). If you use an SWR meter or an analyzer at the base of the antenna you will get the most accurate readings in a timely fashion. HF verticals are versatile, and can deliver both multiband and monoband performance. The antenna provides some gain over a single vertical antenna and offers some signal rejection off the sides. Jumper 2 ¼ ‘ 40-meter phone 32’ 3 ½” 40-meter digital 32’ 9 ½” Jumper 6” 60 meters 43’ 2” 80-meter phone 58’ 3”. The lower bands (80 and 40) want around 100 ohm, 30 and 20 want a 200 ohm feedpoint and 17 through 10 meters would be happiest with a 300 ohm feedpoint. CQ Magazine tested the Challenger and established that on 2 meters, for example, its gain was approximately 6 to 8 dB. The 14 feet is noteworthy. In fact, if you can mount a vertical on a dock over salt water, you can drop a plate into the water and establish a good, low loss system with no radials. I have run 100W through this antenna with no. To upgrade 4BTV to 5BTV you have to use 1" threaded coupler (3/8" x24 threaded x 1"), the part number is HSR-5648. On 40 meters, we de-ployed a pair of Butternut HF2Vs spaced at 57 feet. Many know what to expect from a dipole, I will try to compare this allrounder theoretical and practical with a shorted VERTICAL dipole antenna which can be set from 10-40 meter. The end fed feature adds convenience, but does present another issue. 40 Meter Four-square. 31 foot ground plane Three Quarter wave Vertical: 103. Feedpoint of 40 meter horizontal loop. The high performance of your MOSLEY Antenna can only be achieved if the antenna is. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. One could also make one of these for 80, 60, or 40 meters by laying it on its back an eighth wave over the ground for NVIS work. This calculator will help you to calculate the different wavelength of antennas based on the frequency. The normal quarter wave ground plane antenna consists of a vertical radiator which is insulated and centered between 4 horizontal surrounding radials which extend out from the base of the antenna. This is the second comparison between two of my antennas as receiving antennas on 80 meters: On 26-27 April, 2015, I did another test between two receiving antennas on 80 meters using the WSPR 4 software. Each band tunes independently of the others. With that said, go look up the cost of one that is being sold in. One might expect the total length for a stand-alone 40-meter antenna to be twice that of the 20 meter, given the equation above. It is often the first antenna they buy or build for use on 2 meters after receiving their technician license. It is well constructed and durable. Describe your experience with the MFJ-1795 10/15/20/40 Meter Vertical Antenna and tell us why you give it the rating you did (required). 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. Radioteletype is used frequently on this band as well. KL7JR VERTICAL DIPOLE And a novel matching method. 4 meters of wire and used the same point, 14 meters high, to support a delta loop. The antenna is fed straight from the coax without a balun or choke. This gave me an idea to build a vertical Zepp using only the coax. Their use not only helps one to mentally visualize antenna length,. Overall, I find that a horizontal antenna (dipole) is less noisy than a vertical. The 14 feet is noteworthy. - A standard / remote tuner at the feedpoint will ease construction and allow operation from 3. • 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. For horizontal polarization on portable ops, I am favoring the SOTAbeams BandHopper 40-30-20 meter link dipole. 15 MHz) operating over average soil (conductivity = 0. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. I like to use a home made current choke to keep RF from coming back on the feedline. One vertical element (1/4-wave) is fed at the top where it is attached to a SO-239. The distance between one point to another adjacent point in a wave is known as the wavelength. On 40 meters, ≈12 turns show above the contact ring. "The fact is an Inverted L with 20 or more radials at least 50 feet and hopefully 100 feet long will absolutely smoke any normal height loop antenna or dipole antenna at nearly any distance on 160 meters. 22 foot ground radials Five Eights wave Vertical is: 85. In fact, a half-wave dipole will often outperform many compromise commercial multiband antennas. 20 meters is considered the best band for DX during day and night hours. Radiation Pattern of a Horizontal Buddipole™ on 7. The larger the wire, the wider the bandwidth. add-on section and 14 feet for the 40-meter add-on. You can replace an XM radio antenna with a CB antenna, a ham 40-meter mobile antenna, a cellphone antenna, a GPS antenna, a TV antenna, a wire coat hanger, a 6 GHz microwave antenna, or a chain of. The large diameter yields broadbanded coverage of the 80 Meter Band. You can further reduce the height of the antenna by placing a capacitance "hat" at the top. This can be done using the radio’s VSWR meter or an antenna analyzer. Not having a lot of room for 40 meter beams, I decided to use the space I do have, which is a long wooded fence in the backyard. position, coax length, other antennas in the area and matching method. My favorite antenna for portable use is the end fed halfwave or EFHWA. gr/2013/03/dipole-antenna-with-traps-on-40-20. The resource is currently listed in dxzone. It's a dipole fed off center with a 4:1 current balun at the offset feedpoint. The antenna has a new fiberglass impregnated styron base insulator. I built this antenna specially to be used on the 30 meter band. • The band of 40 meters in. ) Listing on the vertical is still very noisy. I’m always looking for antennas that work. In an attempt to describe it in a few words (like in patent), it is a radical-ratio asymmetric vertical dipole. 80 and 40 meters can even be tuned from the ground without having to lower the antenna. 71 twinlead Quarterwave Vertical is: 33. If you use an SWR meter or an analyzer at the base of the antenna you will get the most accurate readings in a timely fashion. 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. Building stealth antennas to keep prying eyes from detecting your communications resources takes some skill and a lot of ingenuity. Also, 20 Meters is about the lowest frequency antenna with a low VSWR bandwidth that covers the full band. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. 10/15/20/40 Meter Vertical Antenna for Restricted Areas Operate 12, 17, 30, and 60 Meters with these MFJ Stealth WARC Band Vertical Antennas. Electrical degrees are often employed as units of measure when working with antennas. Smart, strong, and elegant all band, stealthy for HOA, No Radials design. 000 Mhz - 07. In particular, we both were impressed with Harry’s 20 Meter Loop Antenna–it’s such a simple project and requires. With a single 1/4 wave counterpoise wire I have easily been able to achieve less than 1. Line Isolation / Choke Balun: A line isolation balun isolates the antenna elements from the coaxial transmission line so that power is radiated by the dipole antenna elements and not by the feed. The antenna is basically a quad opened up on the bottom. QRPGuys Portable 40-30-20m Tri-Band Vertical Antenna - $20 With permission from Joe Everhart, (N2CX), we have adapted his 40-30-20m portable vertical antenna design using switched toroids for the base loading inductance into a lightweight antenna for an easy outdoor setup. Not having a lot of room for 40 meter beams, I decided to use the space I do have, which is a long wooded fence in the backyard. Most commercially-made G5RV. It`s a great way to join new local nets and roundtables, explore the 75-Meter DX window, or add exciting digital frequencies to your operating repertoire. The feed point impedance of a 40-meter antenna varies widely with height above ground. Sunbed vertical for sale Vertical tanning booth/sunbed. Here's two new projects from the NØLX workbench. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. is active for 40,20,15 and 10 and aligned After the coil is only active for 80 meters. 4 out of 5 stars. 1) My 40 foot top loaded VERTICAL was fed to the FT100d transceiver thru an LDG auto tuner. SAR uses the motion of the radar antenna over a target region to provide finer spatial resolution than conventional beam-scanning radars. A high performance of 80/40 vertical meters. 22 foot ground radials Five Eights wave Vertical is: 85. The described below Helical Antenna for the 20- meter band has small sizes, as well it is very easy to tune and moreover the antenna has high performance at the band. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. The antennas are turned by a Hygain HDR-300 rotor. on 20 through 10 meters But for DXing, 160 through 40 meters a vertical can do a good job compared to a low dipole -since it’s more difficult to get a dipole up at a good height. 5 to 6 dB improvement as measured on 40m by Rudy Severns N6LF. This antenna is designed for installations with restricted space. 175 lambda typical • Enhanced point to point communications without intermediation, even without tuners. After a lot of research, I purchased a Gap Titan DX from the Amateur Electronic Supply store in Las Vegas. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. It works well that way too. ground plane antenna with radials. NVIS: Near Vertical Incident Skywave • Requires HF under the MUF, typically 80, 60, or 40 meters in RACES/ARES common use • Low height and vertical orientation create nulls toward near horizontal signals (broadcasters), height. Enough of that, time to design that 40 meter vertical dipole. The need for a 40 meter antenna that would perform well and not violate the spirit of the Home Owner’s Covenants protecting the aesthetics of the neighborhood was the driving force behind the design of this vertical. 40 Meter Four-square. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. 4 GHz 9 dBi direction antenna is designed to strengthen the signal power. Completely factory pre-tuned with SWR of 2:1 or less with a low angle DX radia-tion pattern. Manufacturer of Wireless Accessories - Apparatus - Networks - Digital - Voice Transmission - Reception - Voice - Image - Data Communication Apparatus - CW SSB FT All Modes - HF Portable - Mobile - Telephone. These fed into a small matching box that I built using a schematic I found online. My Favorite 40m "DX" Antenna NOTE: This is not a plug-n-play antenna. The antenna is advertised as covering all bands 40 through 10 (including WARC) with SWR of 2:1 or less, and 100 KHz. However, they did not prohibit a flagpole to show off the colors. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. This gave me an idea to build a vertical Zepp using only the coax. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. This vertical antenna has no lossy traps or coils to burn out. Survivalists should consider an antenna for 20 meters to be used for long distance communications. Maximum-Gain Radial Ground Systems for Vertical Antennas Al Christman, K3LC Table I Optimum number and length of radials for a vertical antenna on 40 meters (7. Orange line is my road. In order to select the better. impedance of 50 ohms with a half wave length antenna, and the capacitor should have the ability to handle the R. Latin America Probably doesn’t need listening antenna. The 4-BTV is designed as a self-supporting vertical to provide optimum operation in the 10, 15, 20 and 40 meter bands. The Wire Size can range from 16 AWG to 12 AWG. We will take an inverted V for 40 meters, an antenna which is widely known amoung HAM's as an allround antenna. 2018-05-21 After building and playing with my 40/20 meter fan inverted Vee and with a month remaining until ARRL's Field day which inspired these efforts, I decided to try building a Trap Inverted Vee for 40 and 20 meters. 40 Meter Wire Antenna Sizes. Several hams I know have used this simple antenna to increase their contacts on 80 and 160 meters. This antenna was designed to provide low angle radiation for good DX performance during the night time hours. Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. The antenna itself is 3. The antenna shown covers 80, 40, 20 and 10 meters with 15 meters and WARC bands only available with an antenna. This antenna was designed to provide low angle radiation for good DX performance during the night time hours. Adding a Director to a ¼ wave 40M HF vertical antenna. The vertical dipole and the vertical monopole tune up the best and flattest (across the bands), and the vertical monopole beats the vertical dipole in this regard. A so-called random wire antenna is an end fed antenna. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. Looking for base antennas. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. This can be done using the radio’s VSWR meter or an antenna analyzer. The 30 meter band is pretty interesting. The counterpoise wire is an important part of tuning the antenna. The first rotatable vertical beam was a 20-meter 2-element. 2018-05-21 After building and playing with my 40/20 meter fan inverted Vee and with a month remaining until ARRL's Field day which inspired these efforts, I decided to try building a Trap Inverted Vee for 40 and 20 meters. Prototype #2 was a "4 Band" ( 40 - 30 - 20 - 10 meters) antenna. The Alpha Loop is a 10-40 Meter transmit/receive antenna, which handles 100 Watts PEP SSB, 50 Watts CW, and 25 Watts Digital. The DX-88 will work against an earth ground and a set of ground. Much taller than the average Ham mobile antenna, this tree branch snapper tops out at 17 feet, 10 inches above the road. However, they did not prohibit a flagpole to show off the colors. It is designed to be fed with 50 ohm coax, and works efficiently for DX or local contacts. The bread and butter antenna is a dipole at about 30'. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. Building an amateur radio antenna for 160 meters is a challenge. I ended up getting the kit straight from Doug Hendricks (KI6DS) himself, so I got a prototype very similar to the current version being sold. The purpose of this project is to design a simple multiband vertical dipole antenna for 20 meters and above, with a tuner, that will provide gain and a circular. Except for a couple of Hamsticks, all of my antennas are homebrew. This up and over, over and down design had been used in HF wire antennas. This most contemporary of multiband vertical designs provides 8 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30 and 40 meter bands. Vertical HF antennas do have their merit though. Let's Design a Vertical The antenna selected for illustration in this article is a top-loaded vertical for the 40-meter band, operating at one quarter wavelength or 90 electrical degrees. Additionally, this article deals with the 20 through 10 meter part of the HF spectrum. Big signal with the Yaesu FT897D. The vertical antenna at W5CSU, constructed of 4·inch down-spouting - 40 feet high - usable on 20, 40, and 80 meters. It may be ground mounted with earth acting as the "image antenna" or installed on the roof using a radial system. The 14 feet is noteworthy. 1 MHz, it is between the 40 and 20 meter bands. If the antenna come in contact with them, it is deadly to anyone in contact with any part of the antenna or the coax or even your transceiver. Additionally, this article deals with the 20 through 10 meter part of the HF spectrum. 160 Meters Our extreme project for 2002 was upgrading the 160M transmit antenna system from a single vertical to an inline array of three verticals, with endfire gain NE and SW, and broadside gain SE/NW. F 23H Vertical 2m: V2000A Vertical 6m/2m/70cm: X 30A Vertical 2m/70cm: X 50A Vertical 2m/70cm: X 200A Vertical 2m/70cm: X 300A Vertical 2m/70cm: X 510HDM Vertical 2m/70cm: Elk Antennas: 2M/440LP5 Log Periodic 2m/70cm : Gap: Eagle DX HF Vertical 40/20/17/15/12/10 Meters : Mounts Quick Tilt Ground & Ladder : Hustler: 4BTV/5BTV/6BTV HF Verticals. I’m always looking for antennas that work. Serious 160 M ops have a listening antenna focused on Europe: 45-60 Degrees. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. Survivalists should consider an antenna for 20 meters to be used for long distance communications. I must mention that this noise problem only affects 40, 80 and 160 meter bands. DX Engineering 40 Meter Fast Taper High Performance Vertical Antennas are self-supporting vertical antenna radiators that operate over the entire 40 meter band with an SWR of less than 1. The Comet CHV-5X, 5-Band, 1/2 wave rotatable dipole for 40/20/15/10/6 meters! Compact, lightweight, easily assembled in either horizontal, "V" shape or ground-plane configurations. It works well that way too. HUSTLER 4BTV 4-Band HP Vertical HF Antenna 10 (11) 15 20 40 Meters for Ham Radio. The QRP Guys persuaded to coax some of Joe's antenna secrets out of him and they are offering his Tri-band (covering 40, 30 and 20 Meters) NPOTA antenna as their newest kit. On 2 meters Challenger is a great base station antenna. It is designed to be fed with 50 ohm coax, and works efficiently for DX or local contacts. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. A Mono GAP is a single band antenna, that functions as an asymmetrically fed vertical dipole. 05 MHz which is not resonant but inductive for lower frequencies used. Listening antennas for Asia and Pacific Needed!. 20 METER PORTABLE GROUND PLANE (From Across the Pond) A J POLE FOR ANY BAND Design a J Pole. What is the Best Antenna for Balcony Use?. My vertical broke the pile in one shout. My first contact to Australia was on my 20 meter loop, so it has to be working great. 1 = 16' 7" 20 Meters was chosen for a test case because the size is easy to work with and it is a good band for testing and making contacts on most any day at any time. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. It is well constructed and durable. With this antenna I was heard 124 km away from me. No 'touchiness' means the coax is not trying to become a part of the. NewSuperAntenna is the Official Super Antenna Systems Corporation website. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. Recently, QRPGuys released a new vertical antenna kit for portable ops, and I couldn’t resist trying it out. Ideas (cheap) for Vertical Antenna Insulators. The large diameter yields broadbanded coverage of the 80 Meter Band. It also supports my 80-160 meter fan dipole and a 40 meter delta loop, along with my B&W multiband folded dummy loader I mean inverted vee. Dipole antenna with traps for 20 and 40 meters Original article posted on: http://sv1cdy. Line Isolation / Choke Balun: A line isolation balun isolates the antenna elements from the coaxial transmission line so that power is radiated by the dipole antenna elements and not by the feed. Joe's antennas were of course, of his own design. END FED 6–40 Meter Multiband HF Antenna Introduction This EARC project produces an inexpensive, multiband, end fed HF antenna matchbox that is quick and easy to setup and use. If you are in a hurry getting on the air or donґt want to disturb your neighbours with ugly antennas this antenna can be the solution. This is a very simple antenna to build. For the PACC contest I need (several) antennas for every band. 20 meter quarter-wave vertical antenna experiment Not content with attempting to understand and build 40 and 80 meter verticals, I've decided to build a 20 meter version tonight. 30 Meter Vertical Antenna. Electromagne2c' Wave'Polariza2on' • Electric'and'magne2c'waves'are'at' right'angles'to'each'other' • Magne2c'wave'dissipates'within'a' few'wavelengths'of'antenna. The roof is not metallic itself, either. With a single 1/4 wave counterpoise wire I have easily been able to achieve less than 1. 40 Meter Wire Antenna Sizes. I have the radio, power supply, and antenna tuner (if required) mostly narrowed down but am uncertain about antennas. Personally I prefer the Coke bottles for 10 to 17 meter antennas, and thicker wine bottles for 20 and 30 meters. Cushcraft achieved a major breakthrough in the development of an HF multiband vertical antenna that has been specifically designed for use with a tuner and amplifier. Field Day Antenna! by Paul - AE5JU (Updated 09-28-2012 with new mods info) This past Field Day the club tried to use a folded loop that just didn't work. Up to 40 meters it's possible to make these antennas rotatable looking at the size of the antennas (and my backyard). A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas. These fed into a small matching box that I built using a schematic I found online. The described below Helical Antenna for the 20- meter band has small sizes, as well it is very easy to tune and moreover the antenna has high performance at the band. The next generation in Design and manufacturing. Since the bandwidth of the antenna is wide the adjustment parameters are relatively broad and fine adjustment is not usually necessary. I had established a 40 meter dipole and was happy with the results. ~ 1 dBi @ 16° for 20 meters – nice low angle ~ 0 dBi @ 25° for 40 meters ~ -2 dBi @ 29° for 80 meters – this is quite functional ~ -8 dBi @ 23° for 160 meters – lossy, but it does work; Several things are apparent: The antenna has “better than nothing at all” performance on 160 meters and is certainly interesting for this. This gave me an idea to build a vertical Zepp using only the coax. In my case I have a Hy-Gain AV-6160 43-foot vertical for 160-20 meters, and a Hy-Gain TH-1 rotatable dipole for 20/15/10/6 meters, as this dipole normally outperforms my vertical on the higher bands. 3 product ratings 3 product ratings. The main category is Vertical antennas plans that is about Vertical Antennas Projects. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. After trimming, the 80 meter elements were about 4 feet long for a total antenna span of about 76. The 80 meter band can be tuned by shortening at the tip. 80-40-20 M dipole 80 40 20 Meter Dipole Array By KJ4EX October 2008 Recently I have installed three of these systems, all untuned, requiring the use of a tuner, but capable of operating on 80 through 6 meters. 43 dB = 94 W F/S at 30 deg -6. use that antenna to call. So, while the antenna is easy to feed on 40, it's a more difficult proposition on 20. Ham Radio and Amateur Radio online equipment sales. Vertical HF antennas do have their merit though. Tests were completed within 20 minutes, from 21:20 to 21:40 local time. The 30 meter band is pretty interesting. Because the 40-meter element uses an offset feed (see Figure 2), it's able to couple efficiently to adjacent 1/2-λ parasitic elements. This rugged Zerofive 40 meter monoband vertical antenna IS OUR TOP OF THE LINE PREMIUM freestanding high performance vertical antenna. The counterpoise wire is an important part of tuning the antenna. ó , kdyh kdg \rxu pxowledqg hqg ihg dqwhqqd lqvwdoohg khuh lq 6lqjdsruh iru d ihz zhhnv qrz dqg dp yhu\ sohdvhg , xvhg wkh zluh iurp p\ suhylrxv dqwhqqd zklfk lv ihhw orqj ,w zrunv ehdxwlixoo\ , kdyh lw. This was our in! The flagpole kit came from Lowes and cost $29. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. It is built from a kit of erector set like components called a BuddiPole, which allows one to set up different configurations of horizantal and vertical antennas tuned for the particular frequency of interest. I am really only interested in 40 meters, the antenna does not need to be multibands. Here are instructions for making a multiband end-fed half-wavelength antenna that works on 17, 20, 30, and 40-meter bands. 40 Meter Antennas 40 meter W8NX Vee 37 ft High -110 deg Apex 107 ft total length 75/40/20/15/10 meter Bands 75-Ohm Feedline 40 m Trap/20-10 m Stub tuned SWR Covers the bands less than 3:1 ERP = 166 W at 70 degrees 30 deg -2. No 'touchiness' means the coax is not trying to become a part of the. It's an 1/8 wave vertical on 160 meters also. If you have a handy tree branch, a wire vertical will also serve, as will wire secured to a wood post - indeed I remember a 3-band vertical that was 10, 15 and 20 meter wires all attached to a single wood member, it had 3 sets of tuned radials. KL7JR VERTICAL DIPOLE And a novel matching method. My favorite amateur radio antenna for the HF bands 10- 20 meters is the Cubical Quad antenna. I give a thumbs up to this antenna; I believe I am getting a lower angle of radiation. How do I know? Because I constructed one for 20 meters and operated it over 100 radials, each one 50′ long. An antenna like that can be fed with a single coaxial feed line as only the tuned wire will radiate. Many know what to expect from a dipole, I will try to compare this allrounder theoretical and practical with a shorted VERTICAL dipole antenna which can be set from 10-40 meter. Probably the best know antenna on our 11 meter band ! Everyone has used this type in the past or will use it somewhere! Although the half wave vertical comes along with various names the PRINCIPLE is all the same. I have documented some of the earlier ones I built in my pedestrian mobile pages. A few days ago, SWLing Post contributor, Robert Gulley (AK3Q), pointed me to an excellent website by Harry Lythall (SM0VPO) which is chock-full of various homebrew radio projects. The Comet GP-15 Tri-Band VHF/UHF Base Vertical Antennas GP-15 provides good gain figures on the 6-meter, 2-meter, and 70-centimeter bands in a compact The Comet GP-15 Tri-Band VHF/UHF Base Vertical Antennas GP-15 provides good gain figures on the 6-meter, 2-meter, and 70-centimeter bands. Let’s analyze this. Only a dipole would be easier to construct and maintain. Double Bazooka NVIS Antenna Calculator. 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. 20 meter quarter-wave vertical antenna experiment Not content with attempting to understand and build 40 and 80 meter verticals, I've decided to build a 20 meter version tonight. The 10/15/20 Meter Trap Vertical Antenna It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands Antenna Vertical Links. With difficulty, it could tune 15 and 17 meters, and my LDG tuner could force it to work on 80 meters, but the amount of energy actually going out the antenna was pitifully small. The problems come in the practical aspects of a 40 meter hex beam. Eventually at an angle of 90° the radials will combine and the ground plane antenna becomes an vertical dipole and exhibits an impedance of 75 Ω. 188 wavelengths long Hustler Rr = 20 ohms Efficiency = 67% (assumes Rg = 10Ω & no coil losses) Note: There are multiple inductors (traps) in-line on 40 meters The 43-foot vertical on 40 meters Antenna is 0. Full 20 meter band coverage is available by simply telescoping the tubing to 16. There is no theoretical reason why a two element Yagi (which is what the hex beam is, essentially) won’t work on 40 meters just as it does on 20 – 10 meters. If you have a handy tree branch, a wire vertical will also serve, as will wire secured to a wood post - indeed I remember a 3-band vertical that was 10, 15 and 20 meter wires all attached to a single wood member, it had 3 sets of tuned radials. Radiation Pattern of a Horizontal Buddipole™ on 7. 20 meter quarter-wave vertical antenna experiment Not content with attempting to understand and build 40 and 80 meter verticals, I’ve decided to build a 20 meter version tonight. Assembling the 20 Meter Antenna Matchbox For the popular 20 meter band, a suitable inductor can be made with 26 turns of enamel coated # 22 copper wire wound on a T80-2 toroid as pictured on the lower left. Doing the layout early on let me know where to place the 40 Meter verticals, and where the 30 Meter verticals go as well. 0 Madeira P/neon 40 Polyester Cone(single) Pale Blue-1874 O/s. This is the second comparison between two of my antennas as receiving antennas on 80 meters: On 26-27 April, 2015, I did another test between two receiving antennas on 80 meters using the WSPR 4 software. mast which holds three other antennas, viz. Also, 20 Meters is about the lowest frequency antenna with a low VSWR bandwidth that covers the full band. 5:1, and are less than 35 ft. It is well constructed and durable. This antenna is 58 ft tall and is mounted on a hinged base. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. And that's all there is to it! This is a great first antenna! Your next step, after getting some air time, will be to insert some traps in that dipole so you can use it on 20-meters. This link is listed in our web site directory since Monday Dec 29 2008, and till today "Dual Band vertical antenna for 20/40" has been followed for a total of 12044 times. Here's how the antenna stacks up with the cap hat, versus a standard 102 inch, 17-7, stainless steel whip. 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. 815-244-3500. Their use not only helps one to mentally visualize antenna length,. True, the q section only works on one band, in this case, 160 meters. Since early 2007, I have had two 40M wire verticals suspended from a rope between two pines in the forest on the slope below our back yard. ' If only one half of it is used it becomes a 'half sloper. 4 m vertical antenna for 40 meters band: a new antenna to test, easy to setup in portable mode. Use Unadilla's W2VS high performance traps to convert your single dipole into a tuned, multiband wire antenna. With the dipole facing North and South, 5x9 reports were received from as far as Argentina, South America. NewSuperAntenna is the Official Super Antenna Systems Corporation website. Vertical antennas are very popular for HF operation because they fit in well to a small garden. With the AV-680, you get the same great traditional performance of the AV-640 on 6 through 40 Meters plus top-to-bottom capability on 80 and 75 Meters. So my question is: Now that the sunspot cycle is going to continue going down, 40 is going to be my main band, but I would like to have a better antenna and signal. Thanks for the report Brent. The other side of the SO-239 is attached to a horizontal half-wave phasing line and then connected to another vertical element (1/4-wave) aiming down to the ground. 1) My 40 foot top loaded VERTICAL was fed to the FT100d transceiver thru an LDG auto tuner. Figure 1 — A comparison of the lower radia-tion angle and greater gain of the Moxon (red) compared to the dipole (blue). The 10 and 6 meter spreaders also use the same spreaders. 188 wavelengths long Hustler Rr = 20 ohms Efficiency = 67% (assumes Rg = 10Ω & no coil losses) Note: There are multiple inductors (traps) in-line on 40 meters The 43-foot vertical on 40 meters Antenna is 0. I would go with vertical for DX. No need for a tower, rotor, and beam to get DX on the 20 meter band. 4 meters of wire and used the same point, 14 meters high, to support a delta loop. Effect of the paired radials. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. Those of you who have heard me demonstrate the 40 meter, two-element horizontal phased array, especially under quiet winter-time conditions, have heard the 30 to 60 db of front-to-back the array is capable of generating. However, they did not prohibit a flagpole to show off the colors. These fed into a small matching box that I built using a schematic I found online. With difficulty, it could tune 15 and 17 meters, and my LDG tuner could force it to work on 80 meters, but the amount of energy actually going out the antenna was pitifully small. One might expect the total length for a stand-alone 40-meter antenna to be twice that of the 20 meter, given the equation above.