low SWR’s is possible in a proper installation. The small mast through the roof on the left supports the top wire to the house. For example, a dipole antenna for the 80 meter band requires a ground length of about 140 feet (43 m) from end to end. On HF it doesn’t matter so much but on 2-meters it does. The boom length is 138 feet (42 meters). All readings were taken with a Array Solutions AIM-1470b Antenna Analyzer. (multiple wavelenghts). The DXE-NVIS-8040S is a shortened NVIS wire antenna kit version that features loading coils to make the 80 meter dipole legs the same length as the 40 meter dipole legs, 34 ft. Double Bazooka NVIS Antenna Calculator. I installed the 80 meter double bazooka as per the instructions and instantly noticed a huge improvement over my Alpha Delta DX LB. The 10-80 meter groundplane vertical antenna is a rugged multiband vertical antenna, That is 43 feet in height. Anything less than 75% of full-size is actually a real compromise. Designed with corrosion-resistant aluminum tubing, this 32-foot tall antenna is very durable and attractive. The computer simulations showed that the 80-meter antenna would have a radiation resistance of only 10 - 15 Ω, that the resonant point could vary by up to 50 kHz with very. Figure 3: 80-meter loop on 15-meter band Our eighty-meter full wave loop antenna (figure 3) has 14. An Isotron Antenna Solves Virtually Any Restricted Space Problem - For example, a 40 Meter Isotron measures only 22 inches x 16 inches x 15 inches!. The full 80 Meter band is covered by the HFp in overlapping segments, as shown in the following table. Mobile Antennas. HF verticals are versatile, and can deliver both multiband and monoband performance. There are times, however, where a shortened vertical for the lower HF bands (such as 80/75 meters) is necessary where horizontal space is lacking. for operation on the 80-meter band while the overall height of the antenna remains less than 20 feet. Latin America Probably doesn’t need listening antenna. DO NOT attempt to use a 15 or 17 meter dipole with this combination, since it will detune both of the other antennas. 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. View this page with the Paypal order form. Note: To be able to efficiently utilize the 6 meter band on any Hi-Q Antenna, one MUST utilize an antenna analyzer, find the 5/8, 3/4 or even the MULTIPLE wavelength resonant point. 80 meters includes the 75 meter band where voice operation is permitted. Can be used as a off center fed shortwave antenna to provide continuous coverage from 500 kHz to 60 MHz. Buckmaster 8-Band OCF Dipole Antennas are 270 feet (82 meters) long and work on 160 (tuner may be required), 80, 40, 20, 17, 12, 10, & 6 meters. the 80-meter parallel vertical wire for simultaneous resonance at 80 and 160 meters, without sacrificing radia-tion efficiency in either antenna. This is the result of my first attempt, a dual band 20 and 10 meter dipole fed from a common feedline. 37 Wind Rating - 85 Pattern - Omni * Bandwidth is within 2:1 SWR. I read a nice article by A. It’s a great HF antenna for the ham radio operator with a smaller backyard!. The SuperLoop 80™ has been used on several DX'peditions. A series matched 40 meter antenna at either 80 or 35 feet meets the 2:1 SWR bandwidth objective, but the goal of SWR at or below 1. Ultimax 80/40 Double Bazooka review VE3BF. The Matching Requirement According to my AIM4170C analyzer, my 43-foot vertical antenna has a capacitive reactance of ~580 ohms on 160 meters. We didn’t need tuners at the antenna bases. This antenna is 58 ft tall and is mounted on a hinged base. 1 at lowest point), for ALMOST the FULL BAND on 40 Meters, and under 1. However if like me you're faced with a small lot or perhaps in need of a stealth multi-band antenna or just want to get on 80 or 160 meters with something that works!. A shortened multi-band End-Fed Half Wave (EFHW) antenna for 80-10m Steve Nichols G0KYA A shortened multiband antenna, about 23m long, for 80m-10m that offers low SWR (1. The boom length is 138 feet (42 meters). I have no space on my city lot for a K9AY Loop or a Beverage antenna. Free shipping on many items HUSTLER WITH 75/80 mhz Band! Without. The meter indications may not be valid for any changes made beyond the meter (farther out the antenna or ground. com: 80 meter antenna. My SWR testing on the second harmonics showed RF and SWR needles swinging up and down together which usually isn't a good indication of an efficient antenna. Dipoles need to be half a wavelength long, locating these long antennas can be an issue, especially when we are aiming for the 80 metre band or lower. The Antenna: The antenna proper consists of a length of copper or copperweld wire, with a center feedpoint. If one were to forgo 160 meter (1. The larger the wire, the wider the bandwidth. Trapped dipole antennas. I wanted high efficiency 40 Meter antenna with low-angle radiation. I have no space on my city lot for a K9AY Loop or a Beverage antenna. Small lengths of RG-8X coaxial cable with UHF connectors would be used to connect the antenna system to the "tuner" and assorted station equipment. I built an experimental antenna similar to the TAK-tenna spiral antenna and was evaluated for SWR response over the frequency range of 7. They are weak on 75/80 and 10-meters and will not pick up 60, 30, and 15 meters. 115 - Multiband Half-Wave Delta. Bandwidth at it's broadest! VSWR 2:1 or better at band edges on 10-40 meters. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. This 40 and 80 meter inverted V antenna is made with loading coils. The last channel is common to the UK amateur experimental band plan. 5 to 28 MHz does not use traps or require antenna coupler. 5, May 2019, pp. I had to tune it (shorten it) for my installation as approx. 1 wave length, more than that, the loop switches to electrical. The antenna design would be no easy matter, as 80-meter CW is my favorite band and mode. 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. They are affected by height above the ground and surrounding objects. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing). I usually give myself an extra foot on each leg nowadays. Each antenna features a 44 inch black fiberglass lower section with integral coil and an adjustable (removable) 4 foot. I have this 4 band short version set up at my home QTH as a horizontal. We didn’t need tuners at the antenna bases. You should consider a multi-band vertical on that 7th floor roof, if roof is large enough to lay out several quarter-wave radials. With decades of experience going into the design, its performance, reliability and maintainability are unmatched. 3 MHz, or the 40-meter band. It includes the popular 10-, 15-, 20-, 40-, and 80-meter bands. In the drawing above, it is shown for just four bands, 80 thru 10. It covers what was the 500kHz marine band but not medium wave, which is a shame. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. With a 1064m2 (1/4 acre) town block with a depth of 60mtr (200') I intended to improve on my previous All Band HF Doublet with an antenna that would be suitable for all the HF amateur bands, including the so called WARC bands and including the 160 metre band. Hustlermanufactures and sells more HF mobile antennas world wide than anyone. 5 to 30Mhz: 80/40/20/15/10m. This band width requires very precise tuning. This is in the same range, it’s just another foot longer than the 33-foot length. Use of the trademark for purposes other than the sale or promotion of Anttron® products is forbidden without the express written permission of Anttron® Antenna Company. Single band antenna when fed by coax •20 meters and above or 80 meters and above •Radials required •Tuner required •Remote tuner at the base is best. This was a spur of the moment project. PHYSICAL DESCRIPTION. 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. They are affected by height above the ground and surrounding objects. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. Million Mile Hi-Q Antenna A Hi-Q Antennas Eham Review by Harold KA0SAB EVEN BETTER In my past review I wrote how I had over 1 million miles on my 5-80 Antenna, well as I stated I wrote Charlie to let him know, and he said he would rebuild it for me at no charge!. Diamond ® Antennas are sold through authorized dealers. Two Band Dipole Series: We have seven two band antenna models available. 80 METER 1/2 WAVE WIRE ANTENNA Set-up as a Dipole or Inverted V Made with W2AU ANsulator 14ga Hard-Drawn Copper Wire Less than 2:1 swr across the band Will handle full legal limit 80 METER 1/2 WAVE WIRE ANTENNA Set-up as a Dipole or Inverted V Made with W2AU ANsulator 14ga Hard-Drawn Copper Wire Less than 2:1 swr across the band. Home • Products • Technical Info • Sample Photos. 80/40m Dipole. An Isotron Antenna Solves Virtually Any Restricted Space Problem - For example, a 40 Meter Isotron measures only 22 inches x 16 inches x 15 inches!. 160M Is a Tough Band • Propagation quite variable, signals often not very strong, heavy QRN during the summer -Mostly a nightime band, varies a lot through the night -During the winter, 800 miles or more is possible 2 hours before sunset, 2 hours after sunrise. 60 meter band is 5MHz is the International Ham Radio band. The "T" section at the top of the antenna, for the cap hat, was a driven element from of a salvaged 2 meter yagi antenna. The loop really, really cuts the mustard on 160, 80 and 40 meters compared to a dipole at the same height. Whatis(aWindom(• Itis(an(offAcenter(fed(dipole(and(can(be(constructed(as(a(mulFband(antenna. 0 MHz in IARU Region 2, and generally 3. Dipoles need to be half a wavelength long, locating these long antennas can be an issue, especially when we are aiming for the 80 metre band or lower. Search this site. Power Input - 1000 watts PEP** Wind Load (sq. That is a good thing, isn't it? After all, everyone wants a high gain antenna. The turnstile antenna Eric mentioned will do well and won't have as much fading nor the inherent 3db loss (or more) a plain dipole will usually have. The classic Butternut HF2V vertical antenna operates on 80 and 40 meters. Here is how I managed to get pretty decent results with a homemade antenna. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. Cutting Chart for 20-80 Meter Plug and Play NVIS Antenna Cut to be resonant at center height 16 feet with ends at 6 feet 20 meters 16' 1 ½ inches 20-meter digital 16' 4 ¼ '. The original design is from Harry Lythall, SM0VPO (ref. 5ft) light weight (7lb 1oz) antenna that is perfect for limited space home use of for that IOTA DXpedition you are planning. and a seperate antenna for 80 meters that i would prefer. please note the pictures indicate that almost half of the making. HF ZS6BKW Multi Band Antenna 160m to 10 meters. For the 40 meter band, I like to cut each leg about 34 feet. Two 1/4 wave ham sticks in a dipole configuration produce a 1/2 wave dipole antenna. I now have a dual band antenna covering the CW portion of the 160 and 80 meter bands with NO active switching or tuning. ) Good success was seen with a MFJ 1988T. At just 67 ft you can hang it any where. View and Download Hy-Gain 18AVQII instruction manual online. 5MHz Band ham Radio MP1 Counterpoise Ground Plane. 5, May 2019, pp. The 1/2-wave 80-meter doublet with ladder line all the way to a 1:1 bifilar choke/balun in or near the tuner is a much better antenna for 80-10, provided you adjust the ladder line length to avoid the voltage and current anti-nodes (i. 4 Meter Ka-band Antenna Broadband MEO Earth Station Antenna Viasat 2. It is not unusual for 80 meter dipoles to be. Anything less than 75% of full-size is actually a real compromise. The End Wire Size can range from 16 AWG to 12 AWG. This classic antenna consists of a 1/4 wave(130 feet) length radiator and is connected to radials laid out on the ground or even buried under the ground. I prefer separate resonant no compromise. Everything you will need to get that big signal on 160 Meters. In this video a demo a working HOA stealth HF transmitting antenna solution using the MFJ-1979 (1/4 wave 20-meter telescoping vertical), RadioWavz "Patriot 80" adjustable loading coil, Hustler. During the PACC 2013 I used this antenna for 160 meters. The aerial I use for the CR100 is a simple wire, about 80 feet long and 30 feet high. I've put up the same multiband doublet I had at Mont Vernon. Antennas at this frequency are large: A quarter-wave vertical, for example, is approximately 65 feet (20 meters) high. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. • Automatic bandswitching -- Single coax cable feed, each band is individually tunable, wide VSWR bandwidth. Wire Antennas for Ham Radio 70 Antenna Ideas Iulian Rosu YO3DAC / VA3IUL, Dual-band Loop Antenna for 30m - 40m 37 61. With a 1064m2 (1/4 acre) town block with a depth of 60mtr (200') I intended to improve on my previous All Band HF Doublet with an antenna that would be suitable for all the HF amateur bands, including the so called WARC bands and including the 160 metre band. If you live on a farm and have lots of time and money to spend on your low band antennas, congratulations… For everyone else, an antenna on the 80 meter band will be a major compromise compared to what we might have for other bands like 10 meters. Don Toman, K2KQ toman@ibm. Electrically, the antenna is nothing special. 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. This antenna provides excellent local and state wide coverage throughout the Hawaiian Islands. Place a 1:1 Balun on the Antenna end of the Feedline. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. on 75/80 meters. Building an amateur radio antenna for 160 meters is a challenge. The 20 meter dipole extends the full length of the space and the last 3 feet or so is drooped vertically at the end wall. Search this site. Since the antenna is only up from 15 feet to about 35 feet above the ground, it is not a DX antenna on 160 or 75/80. 15 MHz, or the tuning capacitor is not centered on the band then some frequency adjustment can be made to the final antenna. (The 75 or 80 meter amateur band in the USA extends from 3. 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”. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing). The Antenna: The antenna proper consists of a length of copper or copperweld wire, with a center feedpoint. Transmitting into the loop will destroy the transistors in the pre-amp. The W3EDP end-fed antenna is a cheap way of getting multi-band operation, especially if you are a newcomer and restricted to 10W. by Harry Lythall (SM0VPO) This project was developed as a result of experiments to become QRV on 80 meters, again, using the little balcony of mine. Amateur Mobile Antennas The Shark single band antenna represent an economical solution to mobile HF operation. End loading a wire is the most efficient way to do this. Electrically, the antenna is nothing special. 285 with less than 1. For the 40 meter band, I like to cut each leg about 34 feet. Serious 160 M ops have a listening antenna focused on Europe: 45-60 Degrees. Enter the desired frequency. Since rhombic antennas operate on "powers of 2" in terms of frequency he had to have separate rhombics for 15 meters. Single band antenna when fed by coax •20 meters and above or 80 meters and above •Radials required •Tuner required •Remote tuner at the base is best. Dipoles need to be half a wavelength long, locating these long antennas can be an issue, especially when we are aiming for the 80 metre band or lower. Operation in the 75/80 meter band is provided by installing the appropriate resonator on top of the 4-BTV. sight communications are fairly reliable up to 80 miles or more with 6 meters • Line of sight communications are fairly reliable up to 50 miles with 2 meters, less consistent to 70 miles • Line of sight communications are more local with 440 MHz, roughly county wide. I wanted high efficiency 40 Meter antenna with low-angle radiation. Here's a vertical antenna for 80 and 160, fed with a single feed line that is simple, effective, and requires no ground system. Up to 100 kHz. Multiband Dipoles Compared (26,496 bytes, PDF file) QST November 1996, pp. If your transceiver does not have an auxiliary antenna jack you will have to build some type of antenna switching arrangement. Wire Antenna Design Lengths. This was a spur of the moment project. wire when used on the specified band. 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. 219 foot jumper from the radio to the SWR meter, and a 71. In addition, the antenna described was a delta loop configuration, which adds a plus due to its known performance to have a directional gain over a dipole. This 40 and 80 meter inverted V antenna is made with loading coils. HF Vertical Antennas and Packages. A better reason to consider this antenna is for reasonable 80-20 meter use and as a practical thing to try for the 160 meter band. So far I had really not been active on 80 meters, due to antenna limitations and its perceived suitability for DX (I am not interested in local rag chewing). Windom Multi Band Antenna 80 - 6 meters. The narrow bandwidth of this antenna will reduce "out of band" noise, and the actual performance is quite acceptable. Yep, and I recommend the 40m band. This has 4 x sloping radials at 45 degrees with a feedpojnt up at about 7 meters in the air. 80 Meter Shortened 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. The E-Probe: a compact yet very powerful receive antenna. Building an amateur radio antenna for 160 meters is a challenge. 1,2,3 This is an. 5 AWG, PL-259 Ends, Pair Qty 1 set Radio Station Equipment; Receive Antennas and. Home • Products • Technical Info • Sample Photos. 109 - Coax Inverted-L Antenna for 80m. 3 Far Field Radiation 3. antenna measures only 67 feet across the top for 80 meter - 6 meter operation, and is fed at the center through a low loss 450 ohm twin lead feed-stub. ) Order 8-Band 3,000 Watt OCF Dipole Antenna: $557 Special Price: $423 (6 or more = $334 ea. A series matched 40 meter antenna at either 80 or 35 feet meets the 2:1 SWR bandwidth objective, but the goal of SWR at or below 1. 9 uH to achieve the 50 ohms. Place a 1:1 Balun on the Antenna end of the Feedline. I installed the 80 meter double bazooka as per the instructions and instantly noticed a huge improvement over my Alpha Delta DX LB. 5 meters (insulated 12 AWG) with 6. Trademark laws also protect the use of this trademark in text or phonic similarities such as Anttron®, *Antron® and/or other forms that closely emulate the registered mark. Jorgenson KE7HR NSS 39382FE The need arose for a compact, cheap, antenna for the 75 meter HF amateur band to be used for cave radio communications. His "main" rhombics were for 160, 80, 40, 20, and 10 meters (1, 2, 4, 8, and 16 times the frequency). If your transceiver does not have an auxiliary antenna jack you will have to build some type of antenna switching arrangement. The 20 meter resonator is a modified Hustler 80 meter resonator rewound to resonate on the 20 meter band. 5:1 across the whole band is not met if the antenna is erected at 80 feet. HF Vertical Antennas and Packages. To support an antenna, I have no tower, and only two trees that aren't too close to a house. In you're opinion which is the best wire antenna for 80, 40 and 20 meter ragchewing? I am using a homebrew G5RV. These affects are due to the influence of waves reflected from the ground, but as the antenna height increases this diminishes. Just turn on, select band on your transceiver and operate. Up to 100 kHz. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 6-80 meter vertical, no radials required jtv-680 multi band hf base antenna. 80 meter loop frequency plot The table above makes it fairly easy to choose the feedpoint impedance for the 80 meter loop antenna. Ground wave is very reliable on this band for long distances, much the same as the AM Broadcast band. There are two 75/80 meter half wave, center fed, sloping dipoles. 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. Each antenna features a 44 inch black fiberglass lower section with integral coil and an adjustable (removable) 4 foot. uk 01922 414796, for all your hf mobile antenna needs. places your main lobe down into upper part of the main 20 meter band DX range. It is important to note that …. If you listen to the DX activity on the Low bands, you'd be forgiven for thinking that you're wasting your time unless you have a 4 Square Array, 20 acres of Beverage antennae, a huge Amplifier, and a neck like an anvil. But performance is down about 8-12db on a dipole on. hf vertical fixed base station antenna for 10 15 20 30 40 75 & 80 meters vswr 2 1 or better at band edges on 10-40 meters up to 100 khz on 75/80 meters 1000 watts ssb or cw solid 1 fiberglads trap forms for optimum electrical & mechanical stability all sections 1-/14 heavy wall high strength aluminum extra. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well. The 80 meter inverted vee is a common and classic antenna. 5/5click here to see their performance reports. 60 meter band is 5MHz is the International Ham Radio band. The upper part of the band, mostly used for voice, is often referred to as 75 meters, since the wavelength is between 80 and 75 meters. So I thought I'd give this one a try. I came up with an antenna that extended only 1. -A 43-foot antenna is very (?) good for 60-10 meters -Modest to low gain -High takeoff angles on higher bands -Not a very good DX antenna for 160/80 meters, but probably better than a dipole up only 40 ft (if the losses are low) -A 43-foot antenna needs base matching to provide good (?) results on 160-and 80-meters. World's Largest Supplier of Amateur Radio, Ham Radio, and Communication Equipment. Fortunately, that fact tends to level the playing field for most hams on 80 meters. Diposting oleh antenaku di 22. Contact one of your local Diamond ® Dealers for current price & availability. In myletter I hadsaid that if they wanted to put their money where their mouth was, send me their antenna and Iwould checkitoutaccordingto their specs and publish the results in CO. On HF it doesn’t matter so much but on 2-meters it does. At right is the PJ-80A from Kazakhstan with split antenna winding and MOSFET RF preamp. 5 lb) antenna that can be user configured in many ways (see pictures below). • No ground orradials needed -- Effective counterpoise replaces radials, end fed with broadband matching unit. Often the items needed can be salvaged from previous antennas, or bought for relatively small cost. I built this antenna and quickly tried it out in February of 2013. 5λ, if the antenna is just 0. The white, side mounted antenna is a duo-band Diamond for 144 and 440 MHz at roughly 50 feet. 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. TAK-tenna markets and sells a 40-meter antenna that is a unique arrangement of a simple dipole where the quarter wave sections are wound into flat spirals instead of being. RADIOWAVZ/ICOM DIPOLE SLIDER CALCULATOR: A Free Download! A must have for all go kits, and to have around the shack, the RadioWavz/Icom Dipole Slider calculates dipole antenna length for your favorite band at the turn of the wrist. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. Mount one of these antennas on a clip or clamp mount, and you can easily halve the figure;. After trimming I found that a main element length of about 67 feet gave a good match across the 40 meter band. The antenna also needed to be capable of handling 50 watts at 100% duty cycle for digital operation as well as 100 watts of SSB. The boom length is 138 feet (42 meters). The antenna is a complete half wave for 40 meters till the coil. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. THE ALL BAND HF DOUBLET (Updated 03/2013 This antenna project will get you up and running with an all band Hf antenna using one of the oldest and least expensive ham antennas aroundthe all band doublet. While the antenna determines SWR when transmitting, the receiver's input impedance determines feed line SWR when receiving. 10 meters swr 1. HFp Antenna User’s Guide The 60 Meter Band The 80 Meter Coil also allows the HFp to be tuned to the new 60 Meter band. Boom = 30 in/76cm; sprial radiating element = 30 in/76 cm diameter; weight = 4 Lbs/1,8Kg. 37 dBi gain, about 6 dB more gain than a dipole, when used on fifteen meters. 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". If you want to use a dipole for a band of frequencies, you cut it to the center frequency on that band, and hope it has a low enough SWR at each end of the band. For the most part, this is true. Being a half-wavelength on that band, the antenna pro-vides an efficient low-angle radiation. By so experimenting, you may. For an 80-10 meter OCF dipole antenna, divide the ½ wavelength standard of 468 by the lowest operating frequency of 3. They will receive better too, so for a housing estate, these are mandatory. Many excellent examples are highlighted in Chapter 9 of the 21st Edition of the ARRL Antenna Book[1]. Hello everyone, In my continued work on broad band antenna designs, I was given a copy of David Cutter, G3UNA article for this design originated by Robert Brown, M0RZF This is a HF configuration of a sleeve dipole. 80/75 Meter Wire Antennas. 4 meter Ka-band antenna is ideally suited for high performance MEO or inclined orbit Ka-band applications. All though 80 meters is a good band for regional communications you will find mostly Morse code and digital communications in place. 7J4AAL's Full-Size, 5-Element, 80-Meter, Rotary Beam Antenna This amazing antenna is located near Hiroshima, Japan. 64 Construction and installation of a dipole for 80-, 40-, 15-, or 10-meters. I choose the Titan DX mainly based on the reviews on eHam. Typical setup time is about 10 minutes. model this antenna. K4TR 160/80 METER INVERTED "L" ANTENNA (MADE TO ORDER) Great way to get on the 160 meter band (or 80 meters) and start working the Dx. Manufacturer of Wireless Accessories - Apparatus - Networks - Digital - Voice Transmission - Reception - Voice - Image - Data Communication Apparatus - CW SSB FT All Modes - HF Portable - Mobile - Telephone. The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. The RadioWavz G5RV Lite. Turn the loop on and set the switch to 80 meters. I have a antennas optimized for each band because I have enough space and trees for supports. The last channel is common to the UK amateur experimental band plan. Think of it as an inverted L fed against an L. The gain is around 4 dBd on 40 mtrs, but it will seem much higher due to the very low angle, radiation pattern. Some TIPS on measuring VSWR and troubleshooting M2 … Antenna Gain: dBi vs. Isotron Antennas 80 Meter Isotron Antenna [ISO-80] - Size (H x W x D} - 32" x 16" x 15" Bandwidth - 110 Khz. To support an antenna, I have no tower, and only two trees that aren't too close to a house. Antenna Plots produced using MMANA-GAL Antenna Model Program – 10m plots omitted to save space. The Top five list contains a few antennas that if you have the room for them perform very well. An HF Portable Antenna Paul R. Full size antennas are a bit awkward at 75 meters. Three popular lengths for the antenna are these: a. The band known as 75 meters is actually part of the 80 meter band but is designated as voice only. McGinnis for their kindly assistance on this project!. EZNEC reports the SWR on 80 meters at about 50:1 (using 450 ohm line). The measurements below are for building a Double Bazooka Near Vertical Incident Skywave (NVIS) Antenna. A series matched 40 meter antenna at either 80 or 35 feet meets the 2:1 SWR bandwidth objective, but the goal of SWR at or below 1. losses on 160- and 80-meters, and will preserve the compromise SWR and relatively low SWR-related losses of the original antenna from 60-10 meters. Matched it in, sent out a CQ from my Ten Tec 40 meter QRP rig and had a great conversation with a fellow ham in St Louis, MO. Monoband HF Dipole Antenna (89,852 bytes, PDF file) QST April 1993, p. The distance between one point to another adjacent point in a wave is known as the wavelength. The CAROLINA WINDOM® is also ideal for those of you who want a high performance antenna to cover the bands not covered by your beam antenna. Search this site. Series matched 20 and 15 meter dipoles at any height meet the 1. Since rhombic antennas operate on "powers of 2" in terms of frequency he had to have separate rhombics for 15 meters. 3:1) on 80m and 40m, and below 3:1 on 20, 15 and 10m. I have a double flat overwound balun ferrite that would love the challenge and a nice adjuster coil that could work alongside and allsorts of variable capacitors but here is a point… i am so used to my vertical supernova all band antenna that i use for 40,20,10,meters without a tuner. The large diameter yields broadbanded coverage of the 80 Meter Band. The Classic Numbers for All Types of Wire Antennas at HF. At the band edges on 10 meters, almost half the power is lost in the feedline, best case (with coax and 1:4. EFHW-8010-1K Multi-Band End Fed Half Wave Antenna. This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band. An antenna 3/4λ high has an angle of radiation of, about, 20 degrees, the angle rises to about 40 degrees at 0. Click & Collect. This is especially true on 80 meters. The AV-18HT features automatic band selection achieved through a unique stub decoupling system which effectively isolates various sections of the antenna so that an electrical 1/4 wavelength (or odd multiple of a 1/4 wavelength) exists on all bands. This is most likely due to the larger difference in frequency ratio between the 80 and 40 meter bands vs the 40 and 30 meter bands. This is my experiment with the 80 meter doublet antenna, using TV twin-lead wire, which is 300 ohms. I chose 58' for Mid 80 Meter Operation. 1 wave length, more than that, the loop switches to electrical. The RadioWavz G5RV Lite. Each antenna features a 44 inch black fiberglass lower section with integral coil and an adjustable (removable) 4 foot. We didn’t need tuners at the antenna bases. QRPGuys Portable 80/60m Vertical Antenna - $20 Expanding on our experience of using the readily available $10 eBay telescoping 17′ fiberglass fishing poles for a vertical support in the Tri-band Vertical Antenna, we are offering a portable 80/60m, center loaded, 15′ long vertical antenna. Trapped dipole antennas. By serendipity, it also covers the 17 and 2 meter bands. It allows the average amateur to compete with the big boys for DX and without spending your retirement to do so. 300 watt - In this kitt are all neccessary parts included to DIY a EndFed Multiband Antenna for the Bands 10-15-20-40-80 Meter up t. Low Band Vertical parts list 1 2 1 1 1 1 1 66 feet 1 Buddipole component Nr Antenna arm Whip Low band coil ' BUDDIPOLE TM LOW BAND VERTICAL FOR 80 METERS. It's now the end of November, and I'm just beginning to install some temporary antennas. 0 MHz in IARU Region 2, and generally 3. on 75/80 meters. Despite all the words and diagrams in handbooks over the years, newcomers still send me questions about the antenna. The harmonic resonant structure that serves every amateur band to 10 meters is clearly evident. If an antenna works on 40. Since a steady carrier works better then whistling into the mike to get a signal, a steady carrier or “tune mode” is built into the rig. 80-10 Meter W7FG True Ladder Line Open Wire Fed Dipole 125' Dipole 100' Feedline 600Ω Open Wire Ladder Line One Conductor from Balun or Tuner to Far End Insulator. Portable UnUnTenna 40m-10m Portable UnUnTenna Plus 40m-10m Portable Tri-Band Vertical Antenna 40/30/20m Portable 80/60m Vertical Antenna Portable No Tune End […]. 5 dB loss on 80 and 40 meters, worst case). I am now going to order the 160 meter double bazooka and take down the alpha delta. Super Antenna MR8075 SuperWire Radial Set 80m-75meter for HF Vertical Antennas 3.