20 And 40 Meter Vertical Antenna

We connected the antenna on a 10 meter long fishing rod and hang out the 20 meters of cable. The EZNEC model shown here is an approximately 13. The problem with an end fed half wave antenna is that the antenna presents a high impedance, creating a. Comments comments Rate this. My search for plans, didn't reveal anything. Electrical degrees are often employed as units of measure when working with antennas. At high frequencies, ham radio antennas can be fairly large. Hy-Gain AV-14AVQ Four-Band HF Vertical Antennas are omnidirectional, self-supporting, trapped vertical radiators that operate in the 10, 15, 20, and 40 meter amateur bands. So what I've tried doing is using my 20 meter loop antenna as a receiving antenna for 75 meters. See Details. This article will introduce you to an antenna I call the 3-Dimensional Folded Loop. THE HALF WAVE VERTICAL. Oh…you can use the 40-meter dipole on 15-meters without modification. 40 twinlead Quarter wave Vertical is: 16. 7 meter tall aluminum mast mounted 3 meters above ground. 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. I use a HyEndFed antenna for HF. A water table close to the surface, especially sea water is a very good ground base. Loop antennas have always fascinated me. 20 Meter "Vertical Zepp Dipole" Antenna by Carl H. By John Portune W6NBC. That is, the two sections of the antenna are separated from each other by the trap. It was built to take along camping so I would only have to take & put up one antenna instead of two. On 60 & 80 meters, it's a receive only antenna, although contacts have been logged. Being a half-. I wanted high efficiency 40 Meter antenna with low-angle radiation. This has 4 x sloping radials at 45 degrees with a feedpojnt up at about 7 meters in the air. , Experts in Manufacturing and Exporting Cable, Antenna and 233 more Products. Radioteletype is used frequently on this band as well. My inverted-V at 40 ft. 15 MHz) operating over average soil (conductivity = 0. A friend, WA7YLI, has similar interests. On small vertical antennas, (such as 10 to 30 meter band), you can make insulate the base real easy. In particular, we both were impressed with Harry’s 20 Meter Loop Antenna–it’s such a simple project and requires. net is a Web site dedicated to ham radio (amateur radio). Horizontal and vertical polarization is obtained by rotating the antenna on the tripod. This coil came from a broadcast transmitter. With the help of the Drake MN-4 transmatch, I was able to get a SWR of 1. Antenna is outperforming any 6 meter vertical, I believe, on the market. Radiation Pattern of a Horizontal Buddipole™ on 7. A Mono GAP is a single band antenna, that functions as an asymmetrically fed vertical dipole. The AV-18VS may be installed on a short 1-5/0 inch dimeter mast driven in the ground. 4-Band antennas cover 40, 20, 10, and 6 meters, with no tuner required! 12 meters may also work on the 4-Band 300 watt model. Only at eHam. You buy Base antennas online with ClassicInternational. 2-meter beamsone vertical and one horizontal. I chose 58' for Mid 80 Meter Operation. 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 pattern on the higher bands. 10/15/20/40 Meter Vertical Antenna for Restricted Areas. 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. 2001 The 40 Meters band stealth vertical antenna by K7ZB "You're 30dB over 9 here…" So goes the consistently fine signal reports received from around the USA and beyond - on 40 meters at the peak of Sun Spot Cycle 23. Could this be the lightest HF vertical in the world? Simple 5/8-Wave Vertical for 12 and 17 Meters QST April 1989, pp. No tuner was used to obtain above results. These antenna systems will work against earth ground or a resonant radial system when mounted well above ground. 5 ft tall Aluminum with Coils, Handles up to 1500W PEPAttaches to most Standard Optional Mast Pipes (not included) & Requires Optional length of 50. I decided it was time to set up a 2 Meter base station. net is a Web site dedicated to ham radio (amateur radio). 31 foot ground plane Three Quarter wave Vertical: 103. The loop really, really cuts the mustard on 160, 80 and 40 meters compared to a dipole at the same height. A loop fed in the southwest corner will have a few dB (3dB or more) gain favoring the northeast corner. The Hy-Gain Model 18V-S is a trap-less, vertical antenna which is manually tuned to any band, 10 thru 80 meters, by a simple adjustment of the feed point on the base inductor. 7 meter tall aluminum mast mounted 3 meters above ground. If you are currently having problems communicating with another person while using omnidirectional antennas, a directional antenna might be an excellent solution. There are numerous reasons why people shy away from trying to put up a good antenna for this band:. It is a VERY effective antenna that will enable you to hear extremely weak DX signals that are buried in noise or covered up by other interference. I was able to work into Central America and the Caribbean as well, but that was the extent of the DX on 40 meters. Save 20 meter vertical antenna to get e-mail alerts and 2 product ratings - HUSTLER 4BTV 4-Band HP Vertical HF Antenna 10 11 15 20 40 Meters for Ham Radio. It is important that humans and animals cannot touch this part of the antenna. On 40 meters I made contact with the UK while there was a big pile-up. Thanks Peter for the inspiration. 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. 250 46" maximum swing 40" under rail 34" turret slide travel up and down 40" left to right main motor 40 hp wired 440 volts, 3phase upd. 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. By Mike Higgins, K6AER. Directivity: It is a measure of how focused an antenna coverage pattern is in a given direction. You buy Base antennas online with ClassicInternational. That is, the two sections of the antenna are separated from each other by the trap. It is difficult to see the Vertical, the green water bottle can be seen just below the center of the figure. Since I've been pretty satisfied with the performance of my 40M tree-mounted wire vertical, I wondered if there was some way to get another vertical mounted nearby and use the two as a phased array. This antenna is by far the best design of the bunch. Here's two new projects from the NØLX workbench. 2001 The 40 Meters band stealth vertical antenna by K7ZB “You’re 30dB over 9 here…” So goes the consistently fine signal reports received from around the USA and beyond – on 40 meters at the peak of Sun Spot Cycle 23. 000 Power Rating 2kw Antenna Lengths 10 Meters each leg 9 ft. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. These antennas can be mounted horizontally, vertically or as a sloper. 66 in total. This configuration results in an SWR of under 2:1 across the entirety of both the 40 and 20 meter bands. Only at eHam. West, Toronto Ontario M3N1V7 Tel: 416-667-1000 [email protected]orld. This makes it very convenient to throw the antenna up in a tree and connect the bottom of it to your radio. I am really only interested in 40 meters, the antenna does not need to be multibands. Manually trimming and tuning the elements to resonant frequencies on the bands they are cut for. Ham Radio and Amateur Radio online equipment sales. Since I've been pretty satisfied with the performance of my 40M tree-mounted wire vertical, I wondered if there was some way to get another vertical mounted nearby and use the two as a phased array. HF Electronics bvba is specialist in de verkoop en verhuur van radio apparatuur voor professioneel en amateur gebruik. Only at eHam. I like to use a home made current choke to keep RF from coming back on the feedline. - 20 Meters each leg 17 ft. INTRODUCTION The basic 40 meter quarter wave vertical antenna is 33′ tall and requires a reasonably good ground or counterpoise system to function properly. Wire dimensions were as Pete's EZNEC model. 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. My first contact to Australia was on my 20 meter loop, so it has to be working great. A variable or switched inductor in a separate tuner, rather than a fixed coil at the base or part-way up the antenna, also assists multi-band operation. Ths ani et nna syset m is desgi ned to address the strni gent requrei ments of both the television broadcast industry and telecommunications. The vertical antenna is specifically designed for low visibility, great for HOA restricted areas, while providing optimum performance on 40 meters. antenna efficiency by 30% to 50% for a 0. Overall length is 40 ft. HUSTLER FOUR BAND Vertical HF Antenna 10 15 20 40 Meters for Ham Radio 4BTV - $182. Yes, I’ve had lightning hit an antenna and yes I had to repair some damage. Thanks Peter for the inspiration. Yesterday there was a field day of the YRC radio club on a nearby farm land. You quite never know when sporadic-E is going to open up or an inversion layer sets in and whisks your signals to who know where. Overall Transmitting Antenna Layout. Antennas for 160 Meter DX 125 foot vertical: the gold standard 160 meter DX antenna well spaced from all nearby tall towers and antennas at least 140 feet from towers over 80 feet tall supporting large HF Yagis optimum performance with spacing much greater than 140 feet at least 30 to 60 shallow buried 125 foot radials. This antenna is designed for installations with restricted space. The Horizontal Loop, also known as the Loop Skywire Antenna, is an old but very effective design. , Experts in Manufacturing and Exporting Cable, Antenna and 233 more Products. 10/15/20/40 Meter Vertical Antenna for Restricted Areas. If you want 75 Meter operation make it 57 ft long. 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. 4 BAND TRAP VERTICAL 10-15-20-40 M. You can get the details here: QRPGuys Portable 40-30-20m Tri-Band Vertical Antenna - $15. 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. 1 MHz, it is between the 40 and 20 meter bands. It can be erected in almost any configuration provided the wires are well separated otherwise it acts as a singe band broadband dipole. "New" refers to a brand-new, unused, unopened, undamaged item, and "Used" refers to an item that has been used previously. These antenna systems will work against earth ground or a resonant radial system when mounted well above ground. 2 meters quad. net is a Web site dedicated to ham radio (amateur radio). 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. Built for 40-meters, the easily assembled antenna exhibited a bidirectional pattern, offered some gain, required no ground system, and was fairly immune to noise and qrm from the sides. 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. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. Just take a look at cluster. 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. The Buddipole™ - HFportable dipole antenna system, Welcome to the home of the Buddipole™, an hf/vhf portable dipole antenna system which is designed to be modular, versatile, and efficient. The 6 meter J-Pole is my favorite antenna. 285 with less than 1. I chose 58' for Mid 80 Meter Operation. 20 meters swr 1. For 20 meters and higher in frequency it is practical to use λ/2 verticals with little or no ground plane. Resources listed under 20 M Vertical category belongs to 20M main collection, and get reviewed and rated by amateur radio operators. My RST using a 5-band vertical was 5--9 while WB3GBFs RST, using an Isotron 40-meter antenna, was 5—20 dB over 9. 25 meters to the North and about 3 km from the Sea to the west. VERTICAL DIPOLE FOR 40M (AND HIGHER) LIGHTWEIGHT PORTABLE VERTICAL DIPOLE ON A FIBREGLASS FISHING POLE. It’s the perfect antenna for roof-mounting, ground mounting, off your patio deck, or to blend into the trees. My search for plans, didn't reveal anything. This makes it very convenient to throw the antenna up in a tree and connect the bottom of it to your radio. HF Multiband Vertical Antenna This multiband vertical design provides 8 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30 and 40 meter bands. com in 3 categories. This video was uploaded from an Android phone. Have a really cramped area available and want to operate on 40 meters? Build yourself a "postage stamp" 40 meter wire dipole antenna that fits in a space a little over 20' wide and works reasonably well at low heights (20′). 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. Being the crafty maker type, I wanted to build my own antenna. Home Brew 80/40 Meter Vertical Antenna I once own a butternut antenna and sold it. The multiband for 40, 20 and 10 meter (11,5 meter long) It does outper. 8 to 40 mHz, and handle powers up to 2 KW PEP (at SWRs of less than 3:1). W2AU’s operate at a low VSWR from 1. This vertical antenna has no lossy traps or coils to burn out. It was designed for the 20 meter band and works well on DX!. ) If you would rather calculate the length of a full-size vertical antenna, see The Quarter-Wave Vertical Antenna Calculator. This most contemporary of multiband vertical designs provides 8 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30 and 40 meter bands. 5:1, and are less than 35 ft. The Sigma-40XK1 is advertised as being an. Antenna is outperforming any 6 meter vertical, I believe, on the market. Many hams’ first choice of antenna is a half-wave dipole. Hy-Gain AV-14AVQ Four-Band HF Vertical Antennas are omnidirectional, self-supporting, trapped vertical radiators that operate in the 10, 15, 20, and 40 meter amateur bands. Find STILL for sale on Machinio. Skip navigation links Products. With a length of 11 meters or more additional guy wire could be used. 01 This note looks at the antenna and antenna model for the 40 meter Moxon Yagi designed by Dave Leeson, W6NL. The 4-BTV is designed as a self-supporting vertical to provide optimum operation in the 10, 15, 20 and 40 meter bands. There have been many manufactures over the years that built half wave vertical antennas that had only a few short radials. Tests were completed within 20 minutes, from 21:20 to 21:40 local time. DX-EE - “No-Trap” 40-20-15-10 meter dipole or inverted V. The 6 meter J-Pole is my favorite antenna. It's the best 40 meter vertical I've made yet but remember - these only work from about 1,000 miles upwards. 7 feet in length, which is called a quarter-wave. Vertical Antenna for 80-, 40-, 20-, 15- and 10- meter Bands. 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. Big signal in a small package. So where is a fellow to start? With the basics of course! Those are fairly simple: 1. Loop antennas have always fascinated me. I give a thumbs up to this antenna; I believe I am getting a lower angle of radiation. The 5-BTV is designed as a self-supporting vertical to provide optimum operation in the 10, 15, 20, 40 and 75 or 80 meter bands. On 75 and 80 meters, you should have about a 220 kHz bandwidth. Why another one? Well, why not! Now before you flip on to the next web site, please read a little farther. Yesterday there was a field day of the YRC radio club on a nearby farm land. 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. AD5X 43-Foot Antenna Efficiency The Hustler 6BTV on 40 meters The 24-foot Hustler is 0. 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. This antenna is 58 ft tall and is mounted on a hinged base. The 5/8th wave vertical can be an excellent DX antenna, if a user is willing to operate it over a perfect or near perfect ground radial system. Hy-Gain AV-14AVQ Four-Band HF Vertical Antennas are omnidirectional, self-supporting, trapped vertical radiators that operate in the 10, 15, 20, and 40 meter amateur bands. 20 Meter Wire Antenna Sizes 15. ith its size, ease of installa-tion, and reliable perfor-mance, the 40 meter quarter wavelength vertical antenna is a very popular HF antenna. Eagle DX HF Vertical 40/20/17/15/12/10 Meters : Mounts Quick Tilt Ground & Ladder : Hustler: 4BTV/5BTV/6BTV HF Verticals: G3-144 Vertical 2 Meter : MFJ: MJF-1835 Cobweb 20/17/15/12/10m : MFJ-1896, MFJ-1890, MFJ-1895 Moxon 6 Meters, 10 Meters, 15 Meters. 160 m loop on 80, 80 m loop on 40, 20 m loop on 10, etc. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Jiangsu Hengxin Technology Co. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. At the higher HF frequencies, antenna sizes drop to 8–16 feet but are still larger than even a big TV antenna. Wider band covers popular VHF and FM frequencies. •20 meters and above or 80 meters and Need to be mounted high enough that the ladder line is vertical for best TV antenna 20 mtr 40 mtr 80 mtr. What is Formula for 40 meter vertical 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. This means at least 50-60 radials that are as long or longer than the antenna is tall. We connected the antenna on a 10 meter long fishing rod and hang out the 20 meters of cable. This article will introduce you to an antenna I call the 3-Dimensional Folded Loop. Ths ani et nna syset m is desgi ned to address the strni gent requrei ments of both the television broadcast industry and telecommunications. 20 meters is considered the best band for DX during day and night hours. Schematic fig1. 01 This note looks at the antenna and antenna model for the 40 meter Moxon Yagi designed by Dave Leeson, W6NL. Restated, table 1 shows us that compared with a 160 meter dipole mounted at 100 feet above the ground, there would be essentially no detectable difference lowering it to 60 feet. Save 20 meter vertical antenna to get e-mail alerts and 2 product ratings - HUSTLER 4BTV 4-Band HP Vertical HF Antenna 10 11 15 20 40 Meters for Ham Radio. If the flagpole is cut to the proper wavelength, then it should aproximate a 50-ohm load. 4 m vertical antenna for 40 meters band: a new antenna to test, easy to setup in portable mode. Hy-Gain AV-14AVQ - 10/15/20/40 Meter Vertical Base Antenna. I'd like to build a 10-15-20 meter vertical antenna that doesn't use ground radials (due to some space limitations). The antenna went together in less than 10 minutes. This can be done using the radio's VSWR meter or an antenna analyzer. It can also be adapted to operate in the 75 meter band. The vertical antenna is specifically designed for low visibility, great for HOA restricted areas, while providing optimum performance on 40 meters. Propagation-wise it more closely resembles the 40 meter band. 2001 The 40 Meters band stealth vertical antenna by K7ZB "You're 30dB over 9 here…" So goes the consistently fine signal reports received from around the USA and beyond - on 40 meters at the peak of Sun Spot Cycle 23. This coil came from a broadcast transmitter. antenna efficiency by 30% to 50% for a 0. These antenna systems will work against earth ground or a resonant radial system when mounted well above ground. 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. Half-wavelength verticals have HIGH VOLTAGE near the feedpoint. All process, step by step (in only 30 minutes). It can also be adapted to operate in the 75 or 80 meter band. At high frequencies, ham radio antennas can be fairly large. webster bennett 36"e-v elevating rail vertical turret lathe. PK-1- Russian Coaxial cable 77- Ohm. Any ideas out there?. Only at eHam. The large diameter vertical element means more bandwidth and high wind handling. Whoever gave thought to the assembly of this antenna is a genius! Great contacts on FM and SSB. And there’s a bonus: you can use the same approach to use your quarter-wave 40-meter vertical as a 5/8-wave antenna on. That is to say the major lobe is between 75 and 90 degrees to the earth's surface. vertical element on both 160 and 80 meters. 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 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. However, unless the antenna is mounted a substantial distance from the real ground ( IE, more than ½ wavelength) the ground still has an effect on the radiation characteristics of the antenna system. "This antenna project came out very nice. 285 with less than 1. Project: Phased Vertical Array I've been thinking about the most effective antenna I could build for 40 meters. 150 MHz so that is the frequency to use in the formula. Ham Radio and Amateur Radio online equipment sales. However, with our trap antenna, the trap is tuned for 14. Q&A for amateur radio enthusiasts. Being the crafty maker type, I wanted to build my own antenna. add-on section and 14 feet for the 40-meter add-on. For 40 meters and lower in frequency, how-ever, a λ/2 height becomes prohibitive and a λ/4 ground-plane with elevated radials is a more practical form of vertical. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. On small vertical antennas, (such as 10 to 30 meter band), you can make insulate the base real easy. Just like I hoped,the SWR on all the bands (10,15,20 and 40 meters) was < 1. the lower HF bands with an outboard tuner, whereas other, tuned trap vertical antennas typically cover only 40 meters and some higher bands, but have little application, and typically no application on 160 meters. This means at least 50-60 radials that are as long or longer than the antenna is tall. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. Ham Radio and Amateur Radio online equipment sales. - 20 Meters each leg 17 ft. Some commercial antennas indicate radials are needed only when you have poor soil conductivity. Exporter of Models-1 - Artery Models, Hypertension Model Set, Pathological Model of Renal Calculus offered by Atico Medical, Ambala, Haryana. What's more, with proper matching, it also performs very well on the 20 meter band. What a bad mistake that was! The butternut antenna I once own was a 5 band vertical and work really good considering I did not have any radials down, and did not have the space to put any down. 58 dB = 36 W No. Building stealth antennas to keep prying eyes from detecting your communications resources takes some skill and a lot of ingenuity. So, I found an inexpensive but accurate antenna tester and rounded up a bunch of antennas. For reception on 7 MHz, I have used a 50 foot piece of wire attached to the center conductor of the SO-239 connector on the back of my xcvr. 66 in total. 15 we get 65. ~$80 ~$70 ~$300 ~$350 Total Switched Antennas Cost Averaged S-Units By Band Antenna 80 Meters 40 Meters 20 Meters. The 20 meter vertical loop antenna will get you around the world if the conditions allow it. I operate mostly on 40 and 20 meters. Manufacturer of Wireless Accessories - Apparatus - Networks - Digital - Voice Transmission - Reception - Voice - Image - Data Communication Apparatus - CW SSB FT All Modes - HF Portable - Mobile - Telephone. It's the best 40 meter vertical I've made yet but remember - these only work from about 1,000 miles upwards. Feeding terminals are chosen to best match of the antenna at all working bands. HamCity has more than 30 years of experience in the amateur radio equipment business! Please visit us today for all your ham radio needs!. If you are currently having problems communicating with another person while using omnidirectional antennas, a directional antenna might be an excellent solution. They're ground. 20 Meter Wire Antenna Sizes 15. I prefer separate resonant no compromise. The large diameter vertical element means more bandwidth and high wind handling. PK3- 3- Russian Coaxial cable 75- Ohm. These antennas can be mounted horizontally, vertically or as a sloper. VERTICAL DIPOLE FOR 40M (AND HIGHER) LIGHTWEIGHT PORTABLE VERTICAL DIPOLE ON A FIBREGLASS FISHING POLE. 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. Project: Phased Vertical Array I've been thinking about the most effective antenna I could build for 40 meters. wifi antenna antenna man rohs antenna antenna cable radio antenna 8 bay antenna sirio antenna maxrad antenna compact antenna gps antenna usb Hy-Gain AV-14AVQ 10/15/20/40 Meter Vertical Antenna 225. On frequencies higher than this the radiation pattern lobe splits and you get a poor low angle lobe along with a high angle lobe. Any help??. Eagle DX HF Vertical 40/20/17/15/12/10 Meters : Mounts Quick Tilt Ground & Ladder : Hustler: 4BTV/5BTV/6BTV HF Verticals: G3-144 Vertical 2 Meter : MFJ: MJF-1835 Cobweb 20/17/15/12/10m : MFJ-1896, MFJ-1890, MFJ-1895 Moxon 6 Meters, 10 Meters, 15 Meters. Since ladder line can be annoying to work with since it doesn't coil easily, I decided to build some winders from 1/2 inch PVC pipe to keep the finished antennas. an antenna tuner at the base of each vertical to adjust the antenna to a center frequency of 3650 kHz; we needed a tuner in the shack to adjust for the CW or SSB band segments. An advertisement for the i-Pole by Proantennas on the WIMO Homepage made me curious and I decided to give that antenna system a try too. In fact, a half-wave dipole will often outperform many compromise commercial multiband antennas. 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. In the next day or two, I will be posting pics and results. 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. Hustler Four Band Vertical HF Antenna 10 15 20 40 Meters for Ham Radio 4BTV 4BTV 4-band vertical HF antenna. add-on section and 14 feet for the 40-meter add-on. With an output of 50 watts, I was able to get reception reports between 569 to 599 on cw and 55 to 59 on ssb. The performance of the antenna, through the model, will be explored in several typical settings. Dahlberg N7AGK Editors note: The author of this project arrived at these plans by experimentation so this antenna should be considered an experimental project by the builder. A 10/17 Meter Hanging Loop Antenna Loops work! Build a hanging loop for 10 and 17 meters that will give almost 3 dBd of gain. 40 Meter Four-square. This review of the Challenger DX Antenna by GAP Antenna covers mounting, use, and a breakdown band by band of performance. Ham Radio and Amateur Radio online equipment sales. New Home of the Force 12 Antennas. It was designed for the 20 meter band and works well on DX!. All you need is one beverage bottle. 5' wire radials. A Mono GAP is a single band antenna, that functions as an asymmetrically fed vertical dipole. 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. An in-line balun takes care of potential feedline unbalance and radiation problems. This antenna is an excellent performer, and ruggedly built. The vertical antenna is specifically designed for low visibility, great for HOA restricted areas, while providing optimum performance on 40 meters. 7 feet in length, which is called a quarter-wave. 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. Your first antenna – the half-wave dipole. CAROLINA WINDOM® 80 The perfect, high performance antenna. 73 Mhz 3rd Harmonic Halfwave in space is: 70. Cushcraft Guy Wire Kit for R8 HF Antenna, 3. I'd like to use an inverted "V" dipole but my house and yard are such that I can only get an inverted "V" up about 20 feet at the center (in an old Elm tree. However when mounting this type of vertical near the ground, its feedpoint should be elevated at least one meter, preferably two meters (4 to 7 feet) above the ground. A 30ft vertical can work well on 40 , and 30 , but on 20 it will be a half wave which is hard to match. Without a single hard-to-tune trap or matching device, it's possible to use a single 50-Ω feed on three ham bands and have a true 1/4-λ vertical on 40 meters, and genuine 1/2-λ verticals on two other bands. Any help??. With a length of 11 meters or more additional guy wire could be used. A ground mounted half wave vertical has a peak radiation angle of 20°, so it makes a good choice for DX. I give a thumbs up to this antenna; I believe I am getting a lower angle of radiation. ith its size, ease of installa-tion, and reliable perfor-mance, the 40 meter quarter wavelength vertical antenna is a very popular HF antenna. a full size 65 foot tall vertical on 80 meters. 1 to 1 on the 40, 20, 15, and 10 meter amateur radio bands. The DX Engineering 40VE-2 is a fast taper single-band vertical antenna system with a low profile top hat assembly and is slightly less than 25 feet in height. the lower HF bands with an outboard tuner, whereas other, tuned trap vertical antennas typically cover only 40 meters and some higher bands, but have little application, and typically no application on 160 meters. Fig 4—Comparison of 80-meter elevation response of 40-foot high, horizontally polarized dipole over average ground and a 40-foot high, vertically polarized half-. HUSTLER FOUR BAND Vertical HF Antenna 10 15 20 40 Meters for Ham Radio 4BTV - $182. New Home of the Force 12 Antennas. 4-Band antennas cover 40, 20, 10, and 6 meters, with no tuner required! 12 meters may also work on the 4-Band 300 watt model. It seems like so long ago in the 1960s when I heard my first front-to-back demonstration of a two-element, 40 meter horizontal phased array by Van, W5ZED. impedance of 50 ohms with a half wave length antenna, and the capacitor should have the ability to handle the R. Amateur Radio Antenna And Feed Line Specifications. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. Hustler Four Band Vertical HF Antenna 10 15 20 40 Meters for Ham Radio 4BTV 4BTV 4-band vertical HF antenna. 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. The formula for calculating the approximate length of a quarter-wave vertical antenna is:. The Half Square antenna is a wire antenna with two vertical radiators fed in phase. ground plane antenna with radials. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: