the quarter-wave vertical element. The use of an antenna analyzer would be a good idea if you have one, but if not, then use your trusty swr meter. When the length of the wire is adjusted to resonance, a dipole will provide a low feed point SWR. 5 feet 15 meters 11. We used 80 and 40 meters since those are the most difficult bands for the average ham with a modest station to work DX. tube above the 20-meter trap. 5/8th Wave Antenna Gain. That said, with such a broad term as 'wire antenna', the 'best length of wire' depends on what you want to use it for. A quarter-wave ground plane is sort of like a vertical dipole, it radiates horizontally in all directions. Hints: Place a quarter-wave plate with one of its axes vertical between the polarizer and the last mirror. With a value of 0. 160 meters 123 - 136 feet 80 meters 65 - 70 feet 40 meters 34. Now, antennas are built on the “quarter wave” principle, so a quarter wave is 96. Homebrew multiband hf vertical antenna. You are now the proud owner of a Comtek 20 Meter Vertical Antenna. Consider two things: 1) According to the ARRL Antenna Book, a quarter wave vertical antenna with fifteen 1/4 wave ground radials may have an efficiency of only 50%; with fewer radials the efficiency suffers even more. Simple Antennas for 10 Meters Some antenna ideas for 10 meters band 10 Meters EH Antenna PDF file with plans to build an eh antenna for 10 meters band, by lloyd butler VK5BR J-vertical for 10 meters J-vertical antennas for 10 meter band, a slim jim for 28 MHz with photos and plans. Once the SWR is good for the 40 meter band, you can test 20, 15, 10 and 6 Meters. Longer ones do offer a bit of gain and a slightly more complex radiation pattern (with a few higher gain lobes and some additional nulls). Most hams, including Ole Joe, will attest that the vertically polarized two meter J-Pole an-. ) The ratio of highest voltage on the line to lowest is the standing wave ratio. In the quarter wave grounded vertical antenna, which consists of a quarter wave vertical element, the ground takes the place of the missing quarter wavelength. The distance between one point to another adjacent point in a wave is known as the wavelength. Such antennas must work against a good ground or counterpoise sys- tem to furnish the other quarter-wave to Complete the dipole antenna. 5 / frequency in MHz. channels for export, commercial and 10 meter ham band use, input 2000 watts P. 5Mhz to 50Mhz on non choke balun version). There are usually four radials, three being a minimum, but you could use up to six. What I really wanted to do was have a vertical half wave dipole, but the problem is that while the impedance at the centre of a dipole is about 50-75 Ohms, and very easy to match to coax, an end-fed half-wave has a very high impedance indeed, around 3000-4000 Ohms. 06 meters telescoping fiberglass mast (MFJ brand). The smallest CB base station antenna would be a quarter-wave vertical, with quarter-wave radials at the bottom. The 20 meter quarter wave wire runs within an inch or two of the 80 meter loading coil. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. 160 meter vertical antenna's base loading and matching unit The following pictures show what my 160M vertical antenna base loading and matching coil assembly looks like. Nice! 30m - a quarter wave wire vertical supported on a roach pole above the tin roof of my workshop. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. Six Meter Rigid Dipole; VHF Airband 1/4 Wave Ground Plane Base Antenna; FM BAND Antennas. An effective emergency antenna used by many amateur radio operators is fashioned by making a 1/2 wave antenna using coaxial cable. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. The vertical portion of the "L" should be as high as possible. Even a half-wave vertical antenna will exhibit a low vertical angle of at least 20 degrees to the horizon. In practice it's best to make the antenna a little longer than the calculated value and then trim it to get the best SWR value. Consider two things: 1) According to the ARRL Antenna Book, a quarter wave vertical antenna with fifteen 1/4 wave ground radials may have an efficiency of only 50%; with fewer radials the efficiency suffers even more. The 6 meter J-Pole antenna is shipped UPS Ground in a sturdy box. By Mike Higgins, K6AER. Author: Current User Created Date: 10/29/2009 6. 04 Mhz 3rd Harmonic Halfwave in space is: 69. 5 inch long, chrome, ¼ wave whip antenna with NMO base. 82 foot ground plane Three Quarter wave Vertical: 101. 5:1 or less! Find DX Engineering 80 Meter Full Size Quarter Wave Vertical Antennas DXE-7580FS-VA-1 and get Free Standard Shipping on orders over $99 at DX Engineering!. The shortest antenna that has a chance of tuning all bands has an electrical length of 143 feet and should be trimmed to give a quarter wave resonance at 1. 5 feet 30 meters 24. One plea at this point: please don't block the calling channel with your QSO. a lack of antennas for the low bands: 160 meters and 80 meters. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. Amateur Antennas : The Solarcon A99 is a half wave over a quarter wave variable mutual inductance antenna for 10 to 17 meters. This antenna is a full size 40 meter half-wave with a tuning stub in the center to adjust the resonance of the antenna as a 20 meter full-wave. 4 As described in the journal articles, the original TASH antenna consisted of a right triangle of conductive material rolled to form the. The usual way to eliminate the requirement for a complicated and space consuming ground system is to center feed a 1/2 wave (in this example a 66′ tall) antenna. They are less efficient than a dipole, and the do require a very good ground connection. The phasing lines are quarter wave of 75 Ohm coaxial cable. " Talk about a theoretical question. At the top of the quarter wave transformer, where the half wave wire is connected to the co-ax, I put some PVC tubing over the end of the co-ax, the PVC tubing was filled with Silicon grease. In the quarter wave grounded vertical antenna, which consists of a quarter wave vertical element, the ground takes the place of the missing quarter wavelength. In effect, the quarter-wave vertical antenna acts like a half-wave antenna. Light with polarization vector components oriented along the ordinary axis will undergo a phase delay relative to the perpendicular component oriented along the extraordinary axis. The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub in a first embodiment. A quarter wave antenna with drooping quarter wave radials exhibits a nominal 50 ohms impedance, one reason for the existence of 50 ohm coaxial cable. A quarter wave vertical requires quite a support structure. You can drag the antenna anywhere. The tuning of this antenna was very straightforward; I simply tuned the main element for the center of the 40 meter band and then adjusted the 20 meter stub for the center of the. This article describes three methods to add 60 meters to your Butternut vertical without losing any other bands. The quarter wave vertical antenna. DIY Antenna for 30 Meters (and 12 Meters, and 6 Meters) The antenna described in this article is a ground plane type quarter wave vertical designed to be used on the 30 meter (10. 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. A slingshot, fishing line, and a sinker to launch the horizontal portion of the antenna into a tree notch approximately 30 feet/9. My understanding is that when building or installing an antenna designed to operate over a ground plane (e. The performance varies from band to band when compared to a single band quarter wave vertical for each band it covers, it provides useable transmit coverage from 10 to 40 meters for most types of ham radio use. The instantaneous value of a sine wave one quarter of the way through the cycle will be equal to the peak value. Full size quarter wave radiator for 40 Meters --that’s 33 feet of radiating power. This antenna is very effective for DX operation, and feedline matching does not appear to be a problem, A simple tuning network may be used if desired. The measurements below are for building a simple Dipole Antenna. The higher gain antennas have a lower vertical beamwidth. The length of a quarter wave for constructing one end of a dipole is: 234/MHz = feet of wire. The stand is plenty stout to handle the 23. Everywhere we look, everything tells us the 5/8th wave has 3dB gain. The large diameter yields broadbanded coverage of the 80 Meter Band. 5:1 • No Tuner needed • Bandwidth: Over 750 kHz. Place the 30-meter trap on it, using clamp assemblies. Options include using a matching section (a quarter wavelength of 75 ohm coax multiplied by its velocity factor), some sort of transformer or open wire feed with a balanced. Standing a tall 39 feet with full-size elements and rated at 2 KW, the AV-18JR Hy-Gain HyTower-Jr. Home; End fed wire antenna calculator. Revers up to the ocean and get excellent results. The easiest approach (and probably most light weight) would be the Marconi style vertical – a single quarter wave vertical radiating element and radials laid on the ground. 8 dB front to back meter 4 square on a 10 to 20 ft. Quater-wavelength in meters: 71. Hints: Place a quarter-wave plate with one of its axes vertical between the polarizer and the last mirror. Use at least a cable with 0. 6 feet As you can see, from this table, the length of a counterpoise can be quite long on the lower bands. 17 inches divided by 4, or 24. For the receiving antennas an 8 MHz horizontal dipole and a quarter wave vertical dipole were used with a precision antennuator between the antenna and a GPR-90 receiver. 5″ tall with 4 97. Shipping the 6 Meter J-Pole antenna. 10 Meter SSB. The feed impedance of a Delta Loop is around 100 ohms so you will have to use a quarter wave length of 75-ohm coax to feed this antenna which is user supplied. 160 meters 123 - 136 feet 80 meters 65 - 70 feet 40 meters 34. — Single vertical antenna element, typically a quarter or more wavelengths long. 964 Mhz 3rd Harmonic Halfwave in space is: 17. The radiator is fed against three or four quarter-wave radials. It worked, but it was never compared to another antenna. 8 feet 10 meters 8. A FULL SIZE quarter-wave high-performance antenna that provides all the important design details. -It includes suction cups for attaching to a wall. Frequency in MHz: Length of the vertical element:--. 83 MHz) 255 ft 9 in 80 (3. 3 feet 20 meters 17. 8 MHz) 123 ft 2 in 40 (7. 5 / frequency in MHz. The advantages of using elevated radial wire ground screens with vertical Effect On Ground And Space Wave Folded Unipole Elevated 10 Meters Over Finite Ground. Are you looking for a fun and easy antenna project? The 1/4 ground plane might be just the ticket. So a physical quarter wave length is 58. Just to add a little to Jack Fraser’s good answer… In the case of radio waves - electromagnetic waves - you can calculate the free space wavelength of a given frequency as below:- c = f λ therefore λ = c / f where: c = speed of light in meters per. 8 MHZ) 1/4 wave vertical(127. Cushcraft's APR-18A radial KIT is universal, and can be used with any multiband quarter wave vertical antenna for better standing wave ratio and greater overall efficiency, which is essential for long distance traffic, reducing ohmic losses related to poor ground. Here the seven different total wire-lengths spanned the range from 500 feet (just less than one wavelength of wire) to 32,000 feet (almost 60 WL). The distance between one point to another adjacent point in a wave is known as the wavelength. 6 feet As you can see, from this table, the length of a counterpoise can be quite long on the lower bands. In fact, the new Penetrator 500 should be marketed as a 12 meter 5/8 wave antenna, because that is exactly what it is. Sticking out of the top of the tube is a seven foot length of one and a half inch diameter tube. Also, an effective ¼ wave vertical needs a lot of ra-dials to make it efficient. nl wrote: >Hello Ken, > >I would not use the 5/8 wave antenna, unless you can make a dipole of >1. product reviews: san diego ham guide. Quater-wavelength in meters: 71. A wire cut to about 95% of free space half wavelength at a desired operating frequency and fed in the middle with 50 ohm coax will operate very efficiently. Six Meter Rigid Dipole; VHF Airband 1/4 Wave Ground Plane Base Antenna; FM BAND Antennas. This antenna may be built as a 20 meter, 17 meter, 15 meter, 12 meter or 10 meter monoband vertical antenna. 5 ft off the ground and the radials slope down from there to about a foot off of the ground. It's an 1/8 wave vertical on 160 meters also. I chose 14. To tune an antenna, use an SWR meter attached between the transmitter and antenna feed-line. Imagine it as being the other half of a dipole. I still get asked about the simple things. HF verticals are versatile, and can deliver both multiband and monoband performance. Nice! 30m - a quarter wave wire vertical supported on a roach pole above the tin roof of my workshop. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarter-wave vertical antenna. The vertical portion of the "L" should be as high as possible. 64 at ground level or low to the ground will work better , being close to the ground will put the takeoff angle higher , same goes for beams. Dipole Antenna Calculator. 29 twinlead Quarterwave Vertical is: 32. When the length of the wire is adjusted to resonance, a dipole will provide a low feed point SWR. The basic formula for determining the length of a center fed, half-wave wire Dipole or Inverted Vee antenna is:. When the Amateur bands expanded in 1979, the last of. Are you looking for a fun and easy antenna project? The 1/4 ground plane might be just the ticket. Horizontal polarization is rarely effective on 160 meters If possible, use a full size quarter wave vertical install at least 120 feet from all tall towers (over 80 feet tall) use much more than 120 feet of spacing for best performance An Inverted-L vertical can also be very effective. How to Make a Homebrew Mobile VHF Antenna. By Mike Higgins, K6AER. I chose 58' for Mid 80 Meter Operation. 40 meter quarter wave vertical with loading coil This afternoon, I’ve been playing with an 8 meter fishing pole in the garden, clamped to a 3 meter aluminium pole with 2 x 10 meter elevated radials sloping from the feedpoint at 3 meters to fence height. Full-size wave room radiator for 40 meters. 17 inches divided by 4, or 24. 11dbi antenna range in meters. VK2PRC Quarter wave vertical, stationary mobile antenna for 20M Band Build this simple 1/4 vertices for 20 meters in a few minutes. Enter a brief summary of what you are selling. The Antenna Farm : 2 Meter Quarter Wave Antennas - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Connectors Aviation Radios Repeater Systems Towers & Accessories Duplexers Diplexers & Triplexers VHF & UHF Base Stations. The base of the antenna is about 3. It will be aimed toward Europe. • Fasten the choke to the quarter-wave support pipe below the shorted end of the quarter-wave feed section of the antenna. Maybe someone can clarify: I hear stories that the Hustler CG-144 2 Meter whip is also usable as a 1/4 wave for 10 Meters. Covers far above and below the traditional C. Portable 2 m quarter wave antenna-This antenna is a quarter wave vertical, fed with a length of coax that is terminated with a BNC connector. The actual length was 66. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. Forty meters: Following a QST article from July, 1972, The W2FMI 20-Meter Vertical Beam, we scaled to 40 meters. Are you looking for a fun and easy antenna project? The 1/4 ground plane might be just the ticket. Put the 24 in. 5 / 10 = 14. channels for export, commercial and 10 meter ham band use, input 2000 watts P. The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarter-wave vertical antenna. 58 X 3) : and I check if X=0 on this frequency, re-adjust if necessary. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. It is just broadly accepted, often without a moment's thought, that a 5/8th wave has 3 dB gain. The 10 meter trap acts as a loading coil on 12 meters, so we can’t use a full quarter wavelength or the radiator on that band either. " Talk about a theoretical question. 150 Mhz ) amateur radio band. The bandwidth of a quarter-wave notch filter is about 20 % (i. 5 : 1 from 28. About 20m Quarter Wave Vertical The resource is currently listed in dxzone. On 10 meters, it actually loses gain. Model DX-A graphic (figures 1-6), pg. Final charge, low loss fiberglass shape, high strength 6061 - T6 Aluminum tube, maximum power PEP of 1500 watts, requires grounding. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works. At the end of the quarter wave matching section of 75-ohm coax, you can attach a random length of 50-ohm coax, again user supplied, which will be run to your rig. Here are my hints and tips to help you get the most channels with your indoor antenna. Ideas (cheap) for Vertical Antenna Insulators. A resonant length for the inverted V dipole may be found to be 4 – 5 % longer than calculated from this formula, depending on ground (and other nearby object’s) conductivity conditions. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. There are presently 10 antennas on it and all the feeds and control lines come off at ground level and go underground to the house. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarter-wave vertical antenna. The most common is the quarter wave Inverted-L. Now in order to get the true SWR of the system, you have to throw away that 3-foot jumper cable for now. Use 75 or 50 ohm cable to feed the centre of the dipole. The graphic above shows the topology of the modified Franklin form. The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. My configuration is the 70’ tower, 12’ of mast above the tower where 4 beams are mounted, a smaller mast above that holds a 2 meter Ringo Ranger. 5:1 or less! Find DX Engineering 80 Meter Full Size Quarter Wave Vertical Antennas DXE-7580FS-VA-1 and get Free Standard Shipping on orders over $99 at DX Engineering!. This antenna may be built as a 20 meter, 17 meter, 15 meter, 12 meter or 10 meter monoband vertical antenna. tube above the 20-meter trap. 125 MHz, how long would it be?. AEcreative 10-160 Meter Amateur ham HF Band Radio Wire Loop Antenna Balun Unun DIY kit T200-2 Type 2 Iron Powder ferrite toroid core 16AWG Enameled Magnet Winding Wire 3. Also, vertical whip antennas radiate towards the horizon at a low angle, helping to make those far off contacts. Final charge, low loss fiberglass shape, high strength 6061 - T6 Aluminum tube, maximum power PEP of 1500 watts, requires grounding. N5VEG 5 Band HF Vertical "Wonderstick" Antenna. • Quarter wave vertical for 80 meters with elevated radials • Steppir DB42 antenna three elements on 30/40 meters, five elements on 20/17/15/12/10 meters, and eight elements on 6 meters, integrated SDA100 controller. antenna specifically for the 75/80 meter bands. Maybe one could get by with a quarter wave designed vertical, but I even doubt that would be effective. Both involved a quarter-wave monopole as the radiating antenna, at a certain height above ground. For instance if you have an 80 meter ham radio transceiver and want to construct a dipole to match a. Use our simple calculator to determine approximate dimensions of materials needed to build a vertical antenna. On Tue, 24 Feb 2009 10:19:14 -0800 (PST), [email protected] The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. 5 ft off the ground and the radials slope down from there to about a foot off of the ground. Wave heights in the sea are usually less than 2 meters, but waves with heights of 10 meters and periods of 12 seconds are not uncommon. 125 Mhz) Quarter Wave Ground Plane Antenna. 82 foot ground plane Three Quarter wave Vertical: 101. pattern of the quarter wave antenna… as a lot of the RF energy goes straight up… and with the half wave antenna, more of the RF energy is radiated toward the horizon. shows how a quarter-wave retarder can be used to convert linear polarization into circular polarization. A battery operated signal generator was used to drive the antennas to eliminate AC lines in the vicinity of the test antennas. 5:1 or less! Find DX Engineering 80 Meter Full Size Quarter Wave Vertical Antennas DXE-7580FS-VA-1 and get Free Standard Shipping on orders over $99 at DX Engineering!. For dipoles, longer than 1/2 wave is great, though some lengths create hard-to-match feedpoint impedances. DIY Antenna for 30 Meters (and 12 Meters, and 6 Meters) The antenna described in this article is a ground plane type quarter wave vertical designed to be used on the 30 meter (10. They are less efficient than a dipole, and the do require a very good ground connection. A quarter-wave ground-plane radiates very little "up" and "down" - so it's certainly not an isotropic radiator. A half wave dipole’s radiation pattern is very broad making its installation. tube with a threaded stud on the upper end. After all, a half wave dipole is 250 feet long. I’m working on a 10 meter vertical antenna for the roof of my house. 6m) long, and top-hat wires are 39 feel (11. The length of a quarter-wave vertical is: λ/4 = 246 K/f MHz. The instantaneous value of a sine wave one quarter of the way through the cycle will be equal to the peak value. These can also be used to seek information. THE HALF WAVE VERTICAL. Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. Antenna theory and antenna terminology can seem complicated to the uninitiated. This is the antenna I have constructed : 10M Vertical Antenna by dxzone. See full list on n1fd. Using the homemade 400 ohm parallel feeder yields a 2:1 SWR on 6 meters and 3:1 on 10 meters – well within easy tuning range of your antenna tuner to be able to use the antenna on both bands with a 1:1 balun (or 4:1 balun if you end up with an odd quarter wave-length multiple of feedline from the shack). The bandwidth of a quarter-wave notch filter is about 20 % (i. During what turned out to be an extended tower-raising project (Going from 55 feet to 90 feet), I had my beam down and I needed an antenna that could provide the necessary gain and angle of radiation to talk to my friend Skip down at the South Pole. 75m (or 108 inches, or 9 feet). shows how a quarter-wave retarder can be used to convert linear polarization into circular polarization. Call or Text: 574-575-6787. Let's add a 20 meter quarter wave wire"; good on paper but bad idea. It worked well. The stand is plenty stout to handle the 23. But often portable use dictates an antenna that is not a full quarter wavelength long and a ground system that is far from optimum. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. As usual, Figure 2 —Gain of a quarter-wave 80 meter vertical antenna over average soil, as the number of buried radials is varied, for seven different total. So, for 6M, L = 300 / 50. A half wave antenna's radiation peak angle is 20 degrees. Cut the wire long and trim as necessary or use a tuner like I do. The impedance of this dipole at 40 meters should be about 12 ohms. antennas that are tunable to operate over segments of the entire 75/80 meter band with an SWR of 1. instead of 75 Ohm for the quarter wave lines. 76 velocity factor, otherwise with 0. The tuning of this antenna was very straightforward; I simply tuned the main element for the center of the 40 meter band and then adjusted the 20 meter stub for the center of the. W1DYJ ~ Larry Banks DXCC WAS VUCC WAC 40M Vertical October 2014 A 40M l/4 Vertical with Elevated Radials Larry Banks, W1DYJ First licensed: 1962 (KN1VFX) W1DYJ since 1966 – Amateur Extra. Good Vertical Antennas • A straight quarter-wave (Best) –λ/4 ~ 125 ft at 1830 kHz with THHN • Inverted L (Good) –Go straight up as high as you can with a wire, then bend the remaining wire to run horizontal to resonate it • Tee vertical (A bit better than L) –Like an inverted L, but the top is extended in opposite directions. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. 8 feet 10 meters 8. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. This could be 50 ohm types such as RG58, RG8X, RG8, RG213, or 75 ohm type such as RG11, RG59, RG6 or even 75 ohm twin lead. Many thanks!. The chart covers all ham bands from 160 meters through 2 meters only. ost commercial 2-meter repeater antennas with gain fall into two categories: collinear arrays and stacked element arrays, with gains ranging from 3 to 9 dB1. HF verticals are versatile, and can deliver both multiband and monoband performance. I still get asked about the simple things. Keep it away from any large metal surface closer than about 1 wavelength. Quarter wavelength at 145. The distance between one point to another adjacent point in a wave is known as the wavelength. The DX Engineering 68 foot vertical antenna supplies the highest possible performance to achieve the strongest possible presence at your power level and be competitive. This mast would support the vertical portion of the inverted "L". Imagine it as being the other half of a dipole. Standing a tall 39 feet with full-size elements and rated at 2 KW, the AV-18JR Hy-Gain HyTower-Jr. The large diameter yields broadbanded coverage of the 80 Meter Band. This antenna is 58 ft tall and is mounted on a hinged base. Made out of aluminum tubing Uses PVC as an insulator Is 32 feet high. Simple Antennas for 10 Meters Some antenna ideas for 10 meters band 10 Meters EH Antenna PDF file with plans to build an eh antenna for 10 meters band, by lloyd butler VK5BR J-vertical for 10 meters J-vertical antennas for 10 meter band, a slim jim for 28 MHz with photos and plans. 58 Mhz and indicate a X=1 or 2 , I try at 19. I had two five meter rods already, and started out with one of them as antenna mast. These are high quality antennas that provide superior performance in demanding applications. We can distinguish three field regions where the electromagnetic wave develops: reactive near. This wire is an inverted L with about 25feet hanging vertical and the rest horizontal. Permit me to add some black magic. product reviews: san diego ham guide. A high performance of 80/40 vertical meters. A quarter wave vertical antenna working against a. For up-to-the-minute news of what's happening on the band, check out the forum and newsgroup for details. I currently have a 40 meter quarter wave vertical antenna with 10 quarter wave ground radials. Also, an effective ¼ wave vertical needs a lot of ra-dials to make it efficient. 11dbi antenna range in meters. 10 Meter CW Center Frequency: 28. An unloaded quarter-wave vertical antenna has a radiation resistance of about 35 ohms with negligible ohmic or conductor loss, but ground 15 and 10 meters. 58 Mhz and indicate a X=1 or 2 , I try at 19. It is in arbitrary unit and has an update rate of 0. Note the lengths for the new 60 meter band frequency to be effective March 5, 2012. utc time pdt time. • Fasten the choke to the quarter-wave support pipe below the shorted end of the quarter-wave feed section of the antenna. Once the SWR is good for the 40 meter band, you can test 20, 15, 10 and 6 Meters. The Antenna Farm : 2 Meter Quarter Wave Antennas - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Connectors Aviation Radios Repeater Systems Towers & Accessories Duplexers Diplexers & Triplexers VHF & UHF Base Stations. The two dipoles in each array are driven 90 degrees out-of-phase with each other to create a cardiod radiation pattern that has maximum gain. Standing a tall 39 feet with full-size elements and rated at 5 kW, the AV-18JR Hygain HyTower-Jr is the world’s second best* performing vertical! Stub-decoupling is used to give full-size quarter wave radiators on 40, 20, 15, 10 Meters with super efficient cage loading on 80 Meters. This is the big brother of the quarter wave vertical I described on another page. On 40 meters, two whips were about 1-1/2 S-units (about 10 dB) below the half-wave 40-meter dipole. The vertical portion of the "L" should be as high as possible. The higher gain antennas have a lower vertical beamwidth. It worked, but it was never compared to another antenna. However, as I am always keen to work any DX and having experienced a single quarter wave vertical on 80m and the advantages of a phased array I decided that I could put up another vertical for 40m on the site of my original 80m vertical as the mounting bracket was still there and. 61 twinlead Quarter wave Vertical is: 8. See full list on n1fd. Specifications: • Full band coverage on 20 or 17 or 15 or 12 or 10 meters with SWR under 1. Here the seven different total wire-lengths spanned the range from 500 feet (just less than one wavelength of wire) to 32,000 feet (almost 60 WL). Save on Ham & Amateur Radio Antennas Trending price is based on prices from the last 90 days. The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. Have you thought about creating a q/wave wire vertical, using perhaps a tree or. #6 Marconi , Dec 26, 2008. You can drag the antenna anywhere. The seismic signal is the vertical channel of the seismometer located in Haviland Hall in the University of California (UC) Berkeley campus. I built this highly modified 5/8 wavelength vertical antenna on Sunday, 26 August 2013, and was pleasantly surprised by its performance, considering the generally poor. DIY Antenna for 30 Meters (and 12 Meters, and 6 Meters) The antenna described in this article is a ground plane type quarter wave vertical designed to be used on the 30 meter (10. Remember that we need ELECTRICAL quarter waves rather than physical quarter waves Find a physical full wave from the formula L = 300 / F(MHz). So if I assume the popular dipole formula 468/F(Mhz) is correct then on 80 meters and applied also to a quarterwave then I would see resonance at F(Mhz) = (468/66)/2 = 3545Mhz. Example : if your dip is around 6. What I really wanted to do was have a vertical half wave dipole, but the problem is that while the impedance at the centre of a dipole is about 50-75 Ohms, and very easy to match to coax, an end-fed half-wave has a very high impedance indeed, around 3000-4000 Ohms. 125 Mhz) Quarter Wave Ground Plane Antenna. For instance if you have an 80 meter ham radio transceiver and want to construct a dipole to match a. 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. For example, the common quarter-wave whip antennas used on FM radios in the USA are approximately 75 cm long, which is roughly one-quarter the length of radio waves in the FM radio band, which are 2. The 5/8th wave is a great antenna misunderstanding example. -It works fine and looks great. 30 Meter (10. Since CB is in the 11-meter band, a quarter wavelength. The shortest antenna that has a chance of tuning all bands has an electrical length of 143 feet and should be trimmed to give a quarter wave resonance at 1. During what turned out to be an extended tower-raising project (Going from 55 feet to 90 feet), I had my beam down and I needed an antenna that could provide the necessary gain and angle of radiation to talk to my friend Skip down at the South Pole. Simple Antennas for 10 Meters Some antenna ideas for 10 meters band 10 Meters EH Antenna PDF file with plans to build an eh antenna for 10 meters band, by lloyd butler VK5BR J-vertical for 10 meters J-vertical antennas for 10 meter band, a slim jim for 28 MHz with photos and plans. 14 meters above ground. You are now the proud owner of a Comtek 20 Meter Vertical Antenna. Nobody questions gain over what reference and under what condition. 22 foot ground plane Three Quarter wave Vertical: 25. For medium-wave (AM) broadcasting, quarter-wave masts are between 153 feet (47 m) and 463 feet (141 m) high, depending on the frequency. The lack of balance is the big issue and is even more accute in a 5/8 wave vertial. A quarter-wave choke of coax is grounded at the socket. A half wave dipole’s radiation pattern is very broad making its installation. So far received 4 votes for a total score of 3. 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. 5:1 • No Tuner needed • Bandwidth: Over 750 kHz. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. 00! Wow! These guys are making some good markup! Features of the K0WA 40 meter verticle. You are now the proud owner of a Comtek 20 Meter Vertical Antenna. I chose 58. This antenna is 58 ft tall and is mounted on a hinged base. A half wave antenna's radiation peak angle is 20 degrees. quarter wave dipole antenna photo. 125 MHz, how long would it be?. In both the left- and right-hand cases, a linear state is incident upon a quarter-wave retarder with the fast axis oriented at +45°, however the orientation of the input linear state is changed from Vertical to Horizontal. For half a dozen reasons, antenna designers start off with a 90% quarter wave when using thin (#10 or smaller) wire. All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 / FMhz = total length in feet. So far received 4 votes for a total score of 3. Sep 9, 2015 - 6 Meter 5/8 Wave Vertical Antenna Project by G3JVL. Both antennas have better DX potential than a quarterwave vertical. They use them on the other bands, while their main antenna is a vertical. It is in arbitrary unit and has an update rate of 0. Within 1dB of full-size quarter-wave vertical antennas can cover up to 20 meters. 40 meter quarter wave vertical with loading coil This afternoon, I’ve been playing with an 8 meter fishing pole in the garden, clamped to a 3 meter aluminium pole with 2 x 10 meter elevated radials sloping from the feedpoint at 3 meters to fence height. Even a half-wave vertical antenna will exhibit a low vertical angle of at least 20 degrees to the horizon. 160 meter vertical antenna's base loading and matching unit The following pictures show what my 160M vertical antenna base loading and matching coil assembly looks like. linear polarizer (LPNIR-100), quarter-wave plate (WPQ05M-1310), and power sensor (S132C) (wave plate only used for circular polarization), or incident upon a polarimeter (PAX5710IR2-T). a quarter-wave vertical), the size of the ground plane does not matter (e. 5 ft off the ground and the radials slope down from there to about a foot off of the ground. 72 twinlead Quarter wave Vertical is: 8. 10N6RDB Antenna In the pictures the bottom horizontal Aluminum tubing is a half-wave dipole tuned to 10 Meters that is all set to be fed with your 50 ohm coax. 04 Mhz 3rd Harmonic Halfwave in space is: 69. This has 4 x sloping radials at 45 degrees with a feedpojnt up at about 7 meters in the air. • Quarter wave vertical for 80 meters with elevated radials • Steppir DB42 antenna three elements on 30/40 meters, five elements on 20/17/15/12/10 meters, and eight elements on 6 meters, integrated SDA100 controller. Multi-band vertical antenna 160 through 10 meters (32. 6 feet As you can see, from this table, the length of a counterpoise can be quite long on the lower bands. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. Also, an effective ¼ wave vertical needs a lot of ra-dials to make it efficient. There are alternatives to a full size half wave dipole. A 2-Meter Vertical Dipole Array Build this 2 or 4-Element VHF repeater antenna with up to 9. Portable 2 m quarter wave antenna-This antenna is a quarter wave vertical, fed with a length of coax that is terminated with a BNC connector. Vertical antennas are radiate in all directions around the antenna, unlike dipoles which are a bit directional. Radios Radio Amateur Hf Radio Hamburger And Fries Ham Radio Antenna Electronics Projects Hobby Electronics Emergency Preparedness Home Brewing. Just to add a little to Jack Fraser’s good answer… In the case of radio waves - electromagnetic waves - you can calculate the free space wavelength of a given frequency as below:- c = f λ therefore λ = c / f where: c = speed of light in meters per. I built this highly modified 5/8 wavelength vertical antenna on Sunday, 26 August 2013, and was pleasantly surprised by its performance, considering the generally poor. 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. The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. Shop for 2 Meter Antennas here. The standard quarter-wave radiator loads up against a ground plan with a typical impedance of 36Ω which will match the standard 50Ω coax feed line with a SWR (standing wave ration) of about 1. The stand is plenty stout to handle the 23. is the world's second best performing vertical! Stub-decoupling is used to give full-size quarter wave radiators on 40, 20, 15, 10 Meters with super efficient cage loading on 80 Meters. Many hams don’t have room to install one. This particular ground plane is constructed out of an SO-2. Tests showed that it was at least as good as a half wave 20m dipole at 30 feet and US stations were romping in during the afternoon on SSB. Quarter Wave Vertical Antenna for 2 Meters with Ground Plane Radials. See details in the enclosed documents or on our website. 30 Meter (10. DIY Antenna for 30 Meters (and 12 Meters, and 6 Meters) The antenna described in this article is a ground plane type quarter wave vertical designed to be used on the 30 meter (10. RETURN TO HOME PAGE. If one were to forgo 160 meter (1. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub in a first embodiment. 5:1 or less! Find DX Engineering 80 Meter Full Size Quarter Wave Vertical Antennas DXE-7580FS-VA-1 and get Free Standard Shipping on orders over $99 at DX Engineering!. Shipping the 6 Meter J-Pole antenna. Quarter-wavelength in feet: 234 / frequency in MHz. Verify that the half-wave plate rotates the input polarization by 90 o. 15 dBi gain and accepts up to 200 watts max power and operates in the 220-225 MHz MHz range. For dipoles, longer than 1/2 wave is great, though some lengths create hard-to-match feedpoint impedances. 73, Bill… W5RWF. a quarter wave vertical antenna for 20 meters band with a good swr on 200 khz this antenna is basically made from two lengths of emt conduit by n0eq. A quarter-wave ground plane is sort of like a vertical dipole, it radiates horizontally in all directions. The frequency is tuned to GPS range, 1. This is the antenna I have constructed : 10M Vertical Antenna by dxzone. Quarter wavelength at 145. Prices do not include shipping from Florida. collinear antenna for 2 meters has a design gain of 10 db in less than 12 feet of length. 160 meters 123 - 136 feet 80 meters 65 - 70 feet 40 meters 34. 3 to 29 MHz. I used the formula Length of Dipole (feet) = 468 / Frequency (MHz). In both the left- and right-hand cases, a linear state is incident upon a quarter-wave retarder with the fast axis oriented at +45°, however the orientation of the input linear state is changed from Vertical to Horizontal. That's 130 feet for 160 meters and 67 feet for 80 meters. Distributor. Are you looking for a fun and easy antenna project? The 1/4 ground plane might be just the ticket. 61 twinlead Quarter wave Vertical is: 8. The performance varies from band to band when compared to a single band quarter wave vertical for each band it covers, it provides useable transmit coverage from 10 to 40 meters for most types of ham radio use. Tests showed that it was at least as good as a half wave 20m dipole at 30 feet and US stations were romping in during the afternoon on SSB. 04 Mhz 3rd Harmonic Halfwave in space is: 69. Without Radials. The single vertical, raised three metres performed very well and I started to have a lot of fun working DX on 40m. This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. A quarter-wave ground plane is sort of like a vertical dipole, it radiates horizontally in all directions. Author: Current User Created Date: 10/29/2009 6. If you just connect it to your coax or rig you will be disappointed. 10 Meter CW Center Frequency: 28. A slingshot, fishing line, and a sinker to launch the horizontal portion of the antenna into a tree notch approximately 30 feet/9. The total length of a dipole antenna for 10 MHz would then be 142. I built the stand from old redwood that I got from taking apart an old deck I built many years ago. A lot goes into designing antennas but with a little bit of guidance and explanation, antenna users (network designers, systems integrators, end users) can read through the antenna specifications and choose the right antenna style for their wireless network design. on more than a single band. 66 factor the lines will be too short to run to the center of the square (where the phasing box should be) with a quarter wave. The wire is exactly 66ft long. This is an End-Fed Half-Wave (EFHW*) antenna for 80/40/30/20/17/15/12 and 10m bands. the quarter-wave vertical element. 5 foot aluminum vertical element. Next step for me is a 10 meter antenna - I haven't decided what to build yet. 10 Meter SSB. A quarter-wave choke of coax is grounded at the socket. " Talk about a theoretical question. Quarter wavelength at 145. Box 1471, R. The N6LF vertical H antenna is an off center fed, capacitively loaded, vertical short dipole. RETURN TO HOME PAGE. THE HALF WAVE VERTICAL. · Fiberglass Omnidirectional Base Station Antenna · Covers far above and below the traditional C. N5VEG 5 band vertical. One can simply understand the function and directivity of an antenna by. The W8AMZ 40m Vertical Wire Monopole antenna uses just three elements, a vertical driven element and two counterpoise radials, to deliver outstanding DX results due to the antenna‟s omni-directional radiation pattern and extremely low 22. 33 ft fiberglass 1. I chose 14. The product requires no radials, no tunings, or adjustments. Because these antennas are used by Search and Rescue teams off-highway as much as they are for traditional on-highway use, customers have often asked if. The standard quarter-wave radiator loads up against a ground plan with a typical impedance of 36Ω which will match the standard 50Ω coax feed line with a SWR (standing wave ration) of about 1. eHam Forums > HomeBrew >. 75m (or 108 inches, or 9 feet). See point X in Fig 1. Good Vertical Antennas • A straight quarter-wave (Best) –λ/4 ~ 125 ft at 1830 kHz with THHN • Inverted L (Good) –Go straight up as high as you can with a wire, then bend the remaining wire to run horizontal to resonate it • Tee vertical (A bit better than L) –Like an inverted L, but the top is extended in opposite directions. The 10 meter trap acts as a loading coil on 12 meters, so we can’t use a full quarter wavelength or the radiator on that band either. The MFJ-1890 is a lightweight aluminum antenna designed to operate in the 10 meter band and we had hoped that with a little messing around we could get it to tune to the 11 meter cb band. ac6v books. 10 20 30 40 50 60 70 0 102030 40 50607 Number of radials Rs (Ohms) 0 7. One of my first contacts was with Australia. 72 twinlead Quarter wave Vertical is: 8. One plea at this point: please don't block the calling channel with your QSO. My configuration is the 70’ tower, 12’ of mast above the tower where 4 beams are mounted, a smaller mast above that holds a 2 meter Ringo Ranger. It's not quite like a ground plane (about 35 ohms, but higher if you droop the radials) or a half wave dipole (about 70 ohms, but lower if you make it an inverted-vee). The fish aren’t biting, and in her boredom the lady notices that the vertical distance between a crest and a trough of a water wave passing the boat is one-quarter the height of the boat. I built the stand from old redwood that I got from taking apart an old deck I built many years ago. 8 MHz) 123 ft 2 in 40 (7. Homebrew multiband hf vertical antenna. Enter the desired frequency and select the wavelength. Quater-wavelength in meters: 71. 5 foot boom). A lot goes into designing antennas but with a little bit of guidance and explanation, antenna users (network designers, systems integrators, end users) can read through the antenna specifications and choose the right antenna style for their wireless network design. Gain is less than a dipole but better than a single vertical. Now in order to get the true SWR of the system, you have to throw away that 3-foot jumper cable for now. Dipole length in meters: 143 / frequency in MHz These are only approximate values. Sep 9, 2015 - 6 Meter 5/8 Wave Vertical Antenna Project by G3JVL. The 20 meter quarter wave wire runs within an inch or two of the 80 meter loading coil. It was a CB vertical that I picked up from Radio Shack on sale because it was discontinued. I used the formula Length of Dipole (feet) = 468 / Frequency (MHz). Antennas for 100 Pound DXpeditions Computer-based antenna modeling and direct experience with lightweight portable antenna systems Volume 1: Selected high band antennas [20-6m]. 150 Mhz ) amateur radio band. For the receiving antennas an 8 MHz horizontal dipole and a quarter wave vertical dipole were used with a precision antennuator between the antenna and a GPR-90 receiver. Mostly, if you want on the HF bands (High frequency - Wikipedia), you will need a multi-band antenna like a Screwdriver antenna, or a tapp. The large diameter yields broadbanded coverage of the 80 Meter Band. These are high quality antennas that provide superior performance in demanding applications. It was mounted on the roof and had two quarter-wave radials for each band. The Butternut vertical is a great antenna in that it covers all HF bands from 160- though 10-meters (or 160-30 meters for the HF-2V) except 60-meters. AEcreative 10-160 Meter Amateur ham HF Band Radio Wire Loop Antenna Balun Unun DIY kit T200-2 Type 2 Iron Powder ferrite toroid core 16AWG Enameled Magnet Winding Wire 3. Four such. When sea waves gain energy, their steepness increases, and when steepness reaches a critical mass of 1/7, open ocean breakers form, called whitecaps. 64 at ground level or low to the ground will work better , being close to the ground will put the takeoff angle higher , same goes for beams. At the end of the quarter wave matching section of 75-ohm coax, you can attach a random length of 50-ohm coax, again user supplied, which will be run to your rig. on more than a single band. 2 W for an antenna cut for the 80-meter band, the radiation resistance can reach 36 W on the 10-meter band. I wanted to keep it simple but get the desired effect if possible. That said, with such a broad term as 'wire antenna', the 'best length of wire' depends on what you want to use it for. cell antenna construction and design folded dipole. 3 to 29 MHz. The large diameter yields broadbanded coverage of the 80 Meter Band. Years ago when chasing 5BDXCC I was also able to relatively easily work and confirm over 100 countries on 80 meters both SSB and CW from California by using a pair of elevated Butternut HF-2V verticals spaced a quarter wavelength apart and having 3/4 wavelength sections of RG-8 connecting them. I chose 14. antenna specifically for the 75/80 meter bands. Mostly, if you want on the HF bands (High frequency - Wikipedia), you will need a multi-band antenna like a Screwdriver antenna, or a tapp. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. When the rotation angle is ~0 o one of the axes is vertical. The DX Engineering 68 foot vertical antenna supplies the highest possible performance to achieve the strongest possible presence at your power level and be competitive. THE HALF WAVE VERTICAL. By using top quality materials, proven antenna knowledge and their patented tunable tip design, they built a pair of dependable antennas you can count on for your day to day communications. Here's my homebrew 30 meter full quarter wave vertical. For dipoles, longer than 1/2 wave is great, though some lengths create hard-to-match feedpoint impedances. Use the remaining length for the horizontal portion. Dipole length in meters: 143 / frequency in MHz These are only approximate values. Cushcraft's APR-18A radial KIT is universal, and can be used with any multiband quarter wave vertical antenna for better standing wave ratio and greater overall efficiency, which is essential for long distance traffic, reducing ohmic losses related to poor ground. Dipoles can be used to bounce signals around the world by literally tossing a wire into a tree. This has 4 x sloping radials at 45 degrees with a feedpojnt up at about 7 meters in the air. The 10 meter trap acts as a loading coil on 12 meters, so we can’t use a full quarter wavelength or the radiator on that band either. If the wave travels in a dielectric medium, for instance in the PCB material, the wavelength has to be divided by the square root of εr. 5 foot aluminum vertical element. This is why a lot of the 50,000 watt clear channel radio stations use 1/2 wave and even 5/8 wave antennas. Wavelength in meters Wavelength in cm 5/8 Wavelength in cm 1/2 Wavelength in cm 1/4 Wavelength in cm 1/6 Wavelength in cm 1/10 Wavelength in cm 4/3 Wavelength in cm: λ decimal feet 5/8λ decimal feet 1/2λ decimal feet 1/4λ decimal feet 1/6λ decimal feet 1/10λ decimal feet 4/3λ decimal feet: Wavelength in inches 5/8 Wavelength in inches 1. With that said, go look up the cost of one that is being sold in the magazines and on the web. 06 meters telescoping fiberglass mast (MFJ brand). This is because a vertical antenna is often the best choice for a small garden. What I really wanted to do was have a vertical half wave dipole, but the problem is that while the impedance at the centre of a dipole is about 50-75 Ohms, and very easy to match to coax, an end-fed half-wave has a very high impedance indeed, around 3000-4000 Ohms. In the summer of 2010, I decided to construct a 1/4 wave 80 meter vertical using 3" OD Aluminum Tubing. 102" whip for rooftop 10 Meter vertical. Polarimeter PAX5710IR2-T. The entire radiator length of the vertical antenna is active on all frequencies except for fifteen meters where the upper portion of the antenna is decoupled above an end of a fifteen-meter quarter-wave decoupling stub in a first embodiment. Sticking out of the top of the tube is a seven foot length of one and a half inch diameter tube. pattern of the quarter wave antenna… as a lot of the RF energy goes straight up… and with the half wave antenna, more of the RF energy is radiated toward the horizon. A quarter-wave choke of coax is grounded at the socket. on more than a single band. This antenna is perfect for HAMS that need a quick reliable solution for local 2 meter communication. MFJ's 5/8 Wave on 2 Meters gives you the maximum possible theoretical gain of any single. 4 product ratings 4 product ratings - Opek VH-1220 2/6 Meter Mobile Ham Radio Antenna, 5/8 wave -2m/ 1/4 wave -6m. a quarter wave antenna dipole for 20 metro. A woman competing in a fishing tournament sits in a 6 meter long fishing boat that is 0. Good Vertical Antennas • A straight quarter-wave (Best) -λ/4 ~ 125 ft at 1830 kHz with THHN • Inverted L (Good) -Go straight up as high as you can with a wire, then bend the remaining wire to run horizontal to resonate it • Tee vertical (A bit better than L) -Like an inverted L, but the top is extended in opposite directions. san diego emergency pages. I cut it to the proper length and fastened it to the eve of my house. 8 dB gain over qtr. The 2 meter full wave loop is so light, it can even be attached to most any non-conductive support with good tape. So far received 4 votes for a total score of 3. After a lot of research, my choice is the Comet Original CHA-250B HF/50 MHz Antenna. ac6v humor. The length of a quarter-wave vertical is: λ/4 = 246 K/f MHz. That said, beyond 30m, it becomes impractical to stick up a 1/4 wave vertical or delta loop, and you need a bagfull of wire to cover the various bands. 83 MHz) 255 ft 9 in 80 (3. A vertical HF antenna offers many advantages—an omnidirectional signal collector and easy to install radiator are two of the biggest. 8 MHZ, or even enough room; not to mention the money, for a 130 foot tower - the length of a quarter wave for 160 meters. vertical that has HF band coverage without lossy traps and tricky adjustments when you install it. Operates 10 through 17 Meters with Tuner. Using a base feed would make this multi use very complicated. 30 Meter (10. On 10 meters, it actually loses gain. Install the 40-meter tube on the top of the 30-meter trap. The 10 meter vertical dipoles were tuned to the proper frequencies (driver and reflector). 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: Gap: Eagle DX HF Vertical 40/20/17/15/12/10 Meters : Mounts Tilt Ladder Mount: Hustler: 4BTV/5BTV HF Verticals: G3-144 Vertical 2 Meter : MFJ: MFJ-1625 Window/Balcony Antenna 80-6 Meters: MP. One plea at this point: please don't block the calling channel with your QSO. new at ac6v.