5/8 vertical groundplane antenna for the 6-meter "Magic Band" (50MHz) - Ham RadioAntennas __ Designed by Guy Roels ON6MU. Stacking two identical antennas can result in 2. On two meters, switching between 1/4 WL and 5/8 WL with the antenna placed at the center of my car roof, there were only a few instances along my commute that showed the 5/8 WL to be any better and not by much. 125 MHz, how long would it be? 3. Go as far as the next paragraph, BUT, DON'T ADD ANYTHING TO THE BOTTOM YET! Now its time to add the additional elements to the top and bottom of the collinear array. rmit:665 Spencer, M and Yarovsky, I 2007, 'Ab initio molecular dynamics study of H2S dissociation on the Fe(110) surface', Journal of Physical Chemistry Part C. After soldering all sections and balun stub together, test SWR with an antenna analyzer or transmitter and SWR meter. both antennas being 5/8 wave i guess it really comes down to aluminum antenna verses the fiberglass antenna. COPPER PLUMBING VERTICAL COLINEAR ANTENNA Hello, everybody in this forum. Our fiber glass collinear antennas uses multiple vertical radiating elements, stacked vertically, fed in-phase to increase the gain of omni. The 5/8th wave antenna has a net loss over a vertical dipole when both antennas are located far above earth. Typically has 6 db (approx), over any other 5/8 wave antenna. I would not use the 5/8 wave antenna, unless you can make a dipole of 1. Watch Queue Queue. For most people the Maco V 5/8 antenna is going to offer more bang for your buck, while antennas such as the I10K generally appeal to the more serious CB'ers or people needing an antenna to handle 100 MPH winds and 10,000 watts of output (the Maco V 5/8 is rated up to 1,200 watts - for those needing higher power capacity in the Maco line. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. The LPH-27A provides excellent reliability in medium range sky wave circuits. This link is listed in our web site directory since Saturday Feb 17 2007, and till today "5/8 Collinear antenna" has been followed for a total of 58981 times. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators. Welcome, Visitor Sign in for shopping! English | Português | Español. A quater wave antenna's radiation pattern like a dome. Â I added a cap on the top end of the PVC. There seem to be many variations of designs, many plans on the net for this type of vertical omnidirectional radio antenna. Â The diagram provided is a more simplified version of the one I did. LAST hint, by using the 5/8 and 1/2 formulas, you can quickly calculate resonances at different frequencies for the SAME antenna length. For instance, a half wave vertical can be stated as having 3db of gain over a quarter wave. 5 Db), and delivers better than average signals, even when hung at only a quarter wavelength (low). Using left over segments of 12 AWG solid copper wire, a section of plexi-glass sheet, some zip ties and a fishing pole I have a great emergency antenna for 2 meters with significant gain when compared to a dipole with about 4 MHZ of usable bandwidth under 1. The most basic antenna, the quarter wave, radiates and receives in all directions around (assuming vertical) and has a vertical directionality that is from mostly horizontal (actually best is a bit above) to about 45 degrees (not much goes up). cb-antennas. The original Dominator NWE-34 is the only non-directional high gain FM broadcast antenna recognized by the FCC and Industry Canada. 8 dB), and delivers better than average transmitted signals even when installed at only ~¼ wavelength above ground, and is directly-fed with any length of 50-Ohm coax. Since the end fed impedance of a 5/8-wave antenna is unsuitable for interfacing. On-line antenna designer. 8 GHz wireless applications. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. COPPER PLUMBING VERTICAL COLINEAR ANTENNA Hello, everybody in this forum. A collinear antenna is an array of at least two dipole antennas, configured such that every element of each dipole is an extension, relative to a longitudinal antenna axis, of the other dipoles in the. See Figure 4 for exact measurements. This fantastic true full-size 5/8 Wave 10 / 12 Meter vertical antenna from Hy-Gain was a legend in the 70's. Loads of plans on the net but very little explanation of how it works. 4Mtrs in length. This is Shakespeare's Galaxy® Style 5225 in a stronger, stiffer radome. This professional quality antenna is a performance powerhouse—collinear-phased 5/8 wave, with two coaxial chokes, to suppress cable radiation. There is actually a middle phasing section, the brings both 5/8 wave elements in phase electrically. A special design is the end fed 1/2 wave. The 5/8 wave antenna also has a net loss over a λ/4 (quarter wave) ground plane with drooped radials. For most people the Maco V 5/8 antenna is going to offer more bang for your buck, while antennas such as the I10K generally appeal to the more serious CB’ers or people needing an antenna to handle 100 MPH winds and 10,000 watts of output (the Maco V 5/8 is rated up to 1,200 watts - for those needing higher power capacity in the Maco line. 2m 7dB COLLINEAR VERTICAL. A collinear antenna is 2 or 3 radiating elements. The AV60BI8 is a high quality gain antenna designed for the maritime VHF radio telephone service. Handles 500 Watts. The Super-J variation of the J-pole antenna adds another collinear half-wave radiator above the conventional J and connects the two with a phase stub to ensure both vertical half-wave sections radiate in current phase. 4 dBi gain over the entire FM broadcast band range of 88-110 MHz! What does this mean to you?. 6 metres (11. Its Galaxy® design maximizes range and quality in a great looking antenna. No other omni directional CB antenna can come close to the gain of this antenna. Collinear Phased 5/8-wave with two coaxial chokes to suppress cable radiation. 4 (a) Vertical collinear antenna array (b) Horizontal collinear antenna array Increase in the length of collinear arrays increases the directivity: however, if the number of. An added bonus is an extremely low angle of radiation!. com in 3 categories. Adding a coil in series with the antenna at the base is one such method of matching. which antenna is better, the i max 2000 or the maco v 5/8 antenna? i know there is a difference in power, one is 1500 watts and the other is 5000 watts. 4-Metre Band 5/8 Wave Vertical Antenna Introduction This project began after a friend (Graham M0GDE) found me a Phillips FM1100 PMR radio suitable for conversion to the 4-m band. 64 wave antenna's matching network is designed specifically to be resonant as a. The swr is. Magnetic Mount Antenna w/ 15' Coax & PL259. The V-2R features two sets of 1/4-wave radials which properly decouple the lower 5/8-wave radiator from the mast. This is a truly professional FM Broadcast antenna, at a hobbyist price that you can afford and is the antenna of choice for the professional personal radio broadcaster! This antenna is a true 5/8 Wave collinear vertical antenna giving you 3. This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802. 1 - Base Station Antenna from Radio Waves. The antenna is constructed much like an ordinary Dipole antenna but with 5/8 Wavelength Elements matched with an added Impedance Matching Section of balanced feed line. Railway freight wagons are unpowered railway vehicles that are used for the transportation of cargoes. I'd be interested to hear if your coverage in the obstructed direction improves with the shorter antenna. Often bought by those who have a 1/2 wave vertical but want to put more effort in the antenna system. A collinear antenna is 2 or 3 radiating elements. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. CO LINEAR ANTENNA DESIGN While it is not possible to home-brew a commercial quality antenna, it is very feasible to build a collinear antenna for average use. 0dBd 5/8 Wave over 5/8 Wave over 1/2 wave 7. It is well suited to ground station, or fixed installation applications. I made a 5/8 wave spider and it didn’t work so well. First add a ¼ wave element to the top of the antenna as shown in Figure 3. 5 dB Collinear/Closed MUF4065(S) 406-430 MHz 5 dB Collinear/Closed MUF4505(S) 450-470 MHz 5 dB Collinear/Closed. Antenna Theory Analysis and Design, 3rd Edition by Balanis. Railway freight wagons are unpowered railway vehicles that are used for the transportation of cargoes. This type used by many, It has deserved a name on the DX-antenna list over the last years. Most often, antenna gain is described as compared with a half wave dipole, but in this case I will use the quarter wave ground plane as a reference to zero gain as we are talking about vertical omni antennas. The feedpoint is a standard N female conector that is protected from the weather within the lower aluminum tube. VHF Vertical Collinear Antennas COL16 COL1 COL34-T1 40221-2 www. Using left over segments of 12 AWG solid copper wire, a section of plexi-glass sheet, some zip ties and a fishing pole I have a great emergency antenna for 2 meters with significant gain when compared to a dipole with about 4 MHZ of usable bandwidth under 1. com Sigma 4 1. The J pole has a quarterwave matching stub. ICV curtains in contrast to VOBAs are supported by six wood poles instead of a single vertical tower allowing for more compact installations. Hustler G-3754 HF Monoband Vertical Antennas do not require ground mounting or a ground-radial system. The Telewave ANT415F8 - Omnidirectional Collinear Antenna 395-436 MHz, is an extremely rugged, medium gain, fiberglass collinear antenna, designed for operation in all environmental conditions. Making First Loading Coils for FM Vertical Antenna Ham Radio 2 Meter Quarter Wave Antenna - Duration: 16. Home • Products • Technical Info • Sample Photos. 2 For an object that experiences a plane wave, the resonant mode is achieved when the dimension of the object is n8/2, where n is an integer. This fantastic true full-size 5/8 Wave 10 / 12 Meter vertical antenna from Hy-Gain was a legend in the 70's. power handling 3kw cw,6kw ssb. 5/8 Wave over 5/8 Wave over 1/2 wave 7. pattern is skewed up off the horizon. The Electric field or E-plane determines the polarization or orientation of the radio wave. The voltage standing wave ratio (VSWR) is defined. Most of them tend to stick to vertical antennas with a 1/4 or 1/2 wave sizing. 5, cut the 19. THE 5/8 WAVE VERTICAL. 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. 5/8 over 1/4 wave design. This OM used a half-wave vertical at 20 m high. This month I decided to build a 2 meter 5/4 wave antenna. Simple, easy antennas are a smart start. Loaded antennas. The 50-MHz profilers at Fleming and Flagler are %_o-beam systems with 50 m x 50 m collinear-coaxial antenna arrays that are. I have been lurking for a while and finally decided to log-in. Eight-foot Antenna. It uses one, six foot. 129 - 2m Vertical Wire Antennas. Im trying to build a 5/8 wave antenna out of an old CB antenna for the VHF band the problem is I cannot find out how to calculate the coil dimentions. The Style 399-1M is the same as the 399-1, but it has a special sleeve for mast mounting. Two 5/8 wave elements are used on 2 meter bands, and four 5/8 wave elements are utilized on the UHF band Find Hustler Base Model G6-270R Vertical Antennas G6-270R and get Free Standard Shipping on orders over $99 at DX Engineering!. Digital Antenna Antenna Collar Digital 10db Ant Vhf 532-vw-rs Digital Rupp With 16' Digital Antenna. This can be measured for both the vertical and the horizontal beams unless the subject happens to be a collinear antenna where the horizontal beam is circular. Discussing antenna patterns usually involves a reference to the antennas beam width. Harsh environments do not affect mechanical or signal integrity. Electrical and Electronics Engineering: VHF Vertical Antenna Ham Radio Antenna Wifi Antenna Radio Wave Radio Frequency Wi Fi Receptor Electronic Engineering Radios Electronics Projects More information. Over-size item. 1 NOTE: This excellent antenna is still available from Hustler. Adding a coil in series with the antenna at the base is one such method of matching. We’ll come back to that antenna later. How does this design compare to other 20 meter vertical antennas? The table below shows a comparison of what you might expect with other architectures. In comparing the performance of an omni-directional antenna, I understand a vertical dipole is the standard of measurement. It also features a 600 watt enclosed coil that mathces the antenna to a nominal 50 ohms. I have used the Sirio for a few years now with great results, so I decided while I was getting around to fixing it I would try out a different antenna. The main category is Collinear antennas that is about Collinear antennas. The antenna can be supplied with or without central mast. I've been reading up on 1/4 wave ground plane antennas to build for 2meter and 70cm. 26-33 Mhz 5/8 Wave Vertical Antenna with Ground Plane - 5000 watt power handling capability. >> > Which antenna is better: 5/8 wavelength vertical or a J pole? >> >> Better for what? For example, a 5/8 whip would usually be better than a J > >Owen, I think the popularity of VHF mobile 5/8 antenna lies in it has >more gain than a 1/4 wl antenna and is easier to match to 50 ohms than >a. This antenna is a dipole antenns with a base connector that can swivel up to 90 degrees. Gain of a Collinear Antenna Array - Duration: 8:05. 8 dB (half power) compared to a quarter-wave vertical antenna. In single element antennas, the 5/8 wave antenna has best performance (3dBd) when mounted on a suitable ground plane. I would not use the 5/8 wave antenna, unless you can make a dipole of 1. The Style 5102 carries on that tradition. This link is listed in our web site directory since Saturday Feb 17 2007, and till today "5/8 Collinear antenna" has been followed for a total of 58981 times. Only at eHam. In comparing the performance of an omni-directional antenna, I understand a vertical dipole is the standard of measurement. The 6dB Base Station Antenna is internally constructed using aluminum & Copper/Polyethylene conductors in a stacked element 5/8 over 5/8 Wave collinear configuration and is house in a robust, one piece, tapered cylindrical fiberglass radome. 8 dB), and delivers better than average transmitted signals even when installed at only ~¼ wavelength above ground, and is directly-fed with any length of 50-Ohm coax. both antennas being 5/8 wave i guess it really comes down to aluminum antenna verses the fiberglass antenna. Half Wave Dipole; Concealment; Bifilar; Dual-Band; Tri-Band; 2-Section Collinear; 3-Section Collinear; 4-Section Collinear; 6-Section Collinear; 8-Section Collinear; 10-Section Collinear; Full Wave Dipole; Conical Helical; Cellular Band; Flange Mount Base. The type MD-G3 has been designed as a robust, high gain antenna system and is ideally suited for base station and marine mobile use. The book says the two stacked 1/2-wave collinear elements provide about 6 dB gain over a 1/4-wave whip antenna and about 3 dB gain over a 5/8-wave antenna. Modifications void your warranty (especially radio MARS/CAP modifications). Since this Not so much antenna types as antenna features, Fetch Full Source. On-line antenna designer. vertical, 10/12, penetrator, 1. Constructed of. 2dBd 5/8 Wave over 1/2 wave 5. Peak gain is usually on the horizon. 4GHz vertical collinear omnidirectional antenna 6dB colinear VHF antenna Building details of a VHF colinear antenna with 6 db gain 5/8 Collinear antenna A 5/8 wave stacked j-pole antenna plan Build A 9dB, 70cm Collinear Antenna 70cm, Collinear Antenna From Coax. 1 NOTE: This excellent antenna is still available from Hustler. Hold on here, just wait! Solder together the 8 sections you cut. The quarter wave vertical antenna. For most people the Maco V 5/8 antenna is going to offer more bang for your buck, while antennas such as the I10K generally appeal to the more serious CB'ers or people needing an antenna to handle 100 MPH winds and 10,000 watts of output (the Maco V 5/8 is rated up to 1,200 watts - for those needing higher power capacity in the Maco line. A half-wave dipole the most common type, has two collinear elements each a quarter wavelength long and a gain of 2. 2 Meter vertical with 3 dBd gain derived from the famous extended double zepp antenna design. Typically has 6 db (approx), over any other 5/8 wave antenna. 4-Metre Band 5/8 Wave Vertical Antenna Introduction This project began after a friend (Graham M0GDE) found me a Phillips FM1100 PMR radio suitable for conversion to the 4-m band. These antennas are typically fabricated in assemblies of fiberglass tubes. au The 66-88 MHz COL range is a series of "cut to frequency" 3dBd gain vertical collinears. Best RDF Many antennas from types 1, 5 and 6 ½ wave resonator with matching line Multi band versions Type 1 antenna Two elements to make Circular polarization Circular polarization adds diversity fading margin for a transmit repeater See one at crc RDF worse in urban environments due to vertically polarized noise Similar performance to the. The SWR is 1:15:1 at resonance and the bandwidth is 6 MHz (@a. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. The main category is Collinear antennas that is about Collinear antennas. 25 feet 3 inches, UHF female connector. 2 dB - absolutely the highest gain mobile antenna available. 4 dB gain over a dipole. The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators. It is constructed of marine grade, low corrosion,. Antenna a 4 dipoli collineari verticali per UHF ricostruzione dei collegamenti e misure col miniVNA Tiny Introduzione L’antenna in questione è una schiera di quattro dipoli semiripiegati, allineati sul piano verticale ed alimentati in fase tramite una rete in cavo coassiale. The classic Collinear Array consisting of two ½ wave radiators in phase is an antenna that exhibits some degree of gain (~1. It is well suited to ground station, or fixed installation applications. This multiband vertical design provides 8 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30 and 40 meter bands. Will a high gain antenna actually suit your purpose? When buying an antenna, customers will often look for the most gain they can get, thinking that high gain will surely give them the best transmit and receive range possible. This antenna does not need a ground plain but one can be added if you want to. Only at eHam. The Centennial antennas have a high-gloss, polyurethane finish that wont turn yellow in the sun. Review Summary For : ZeroFive Antennas 20 Meter 5/8 wave vertical; Reviews: 8 MSRP: 299. Length/Angle of Radials for VHF 5/8 wave??? (1/2) > >> Dan Starkenburg: I've made numerous 1/4 wave groundplane antennas for two meters and have had good luck making the radials all 1/4 wavelength long and tilting them down 45 degrees, give or take. Magnet mount holds to 85 mph. The free space gain is 2. 8 C oaxial 1/2 wave element =1/2 x 27. FYI -- This was (many years ago) for a science fair I entered. In the end, the 5/8 WL antenna might not prove to be that much better and it might be tough to verify. All FM antenna sales include free tuning to your frequency. As the top choice for charter boat captains and experienced sport fishing enthusiasts, this long-distance VHF antenna is rigid enough to stay erect in rough seas, yet exceptionally lightweight. Railway freight wagons are unpowered railway vehicles that are used for the transportation of cargoes. The double 5/8 is a co-axially fed variation of the 1¼ wave (vertical) dipole shown in the adjacent diagram. 4GHz Vertical antenna Building a 2. 220 MHz Quickie Quarter Wave Antenna -- From Artsci 220 MHz J Pole Antenna-- From N6ZAV Super J-Pole Antenna (Collinear Design) - By KB0YKI. 95 each All information, images, and documents on this website are the sole property of Hygain Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Hygain. 50 Mc 1/2-wave vertical antenna - Ham RadioAntennas __ Designed by Guy Roels ON6MU. 2 sets of 1/4 wave radials properly decouple lower radiator from the mast. a) 10 foot length of #8 copper wire (#10 will work, too) b) 26-inch piece of RG-58 coax c) A length of any type 50-ohm coax long enough to go from the antenna to your radio. Radiating elements are two collinear 5/8 waves fed in phase. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. How does this design compare to other 20 meter vertical antennas? The table below shows a comparison of what you might expect with other architectures. 2-dipoles mounted at the side of the tower will not give perfect omni-directional coverage; this antenna at the top of a tower will. Diamond ® Antennas are sold through authorized dealers. Advertisment has always pushed the 5/8 antenna, costs more, but in conclusion note these vertical raditation patterns; the 1/4 wave has a noticable null spot directly on top of the antenna (off the end) straight up as it were, where the 5/8ths has even worse radiation upward, but more at a right angle. You have seen them in catalogs for $150 to $250. , the left-moving and right-moving (quasi)particles become inequivalent. However in broadcasting monopole antennas 5/8 = 0. These DX Engineering 68 ft. Here is a closeup of the lobes on the right… Close up of EZNEC J-Pole Lobes. 2 dB gain with an optimum low-angle radiation pattern. Antenna a 4 dipoli collineari verticali per UHF ricostruzione dei collegamenti e misure col miniVNA Tiny Introduzione L’antenna in questione è una schiera di quattro dipoli semiripiegati, allineati sul piano verticale ed alimentati in fase tramite una rete in cavo coassiale. A matching device of some sort must be added between the antenna and the feedline if you wish to feed it with coax. It is well suited to ground station, or fixed installation applications. The type MD-G3 has been designed as a robust, high gain antenna system and is ideally suited for base station and marine mobile use. The original Dominator NWE-34 is the only non-directional high gain FM broadcast antenna recognized by the FCC and Industry Canada. VHF Vertical Collinear Antennas COL16 COL1 COL34-T1 40221-2 www. I won`t speculate that you actually get more gain from (2) stacked 5/8-wave sections, but it`s possible. In relation to the general performance levels between 1/4 wave unity antennas and 5/8 wave gain antennas (or even higher gain collinear) it is a good general rule that the higher the gain the better the antenna will perform. 4GHz vertical collinear omnidirectional antenna 6dB colinear VHF antenna Building details of a VHF colinear antenna with 6 db gain 5/8 Collinear antenna A 5/8 wave stacked j-pole antenna plan Build A 9dB, 70cm Collinear Antenna 70cm, Collinear Antenna From Coax. The "extension" being an extra 1/8 wavelength added to the Zepp (on each side). Gain: 5 dB. The antenna consists of a 16. See Figure 4 for exact measurements. Which in turn raised another point regarding the 5/8th wave antennas : Doug Thanks for the early reply. There is no collinear mobile design for HF frequencies due to the extremely large components necessarily that make a mobile design impractical. 5/8 Wave antennas Very common for VHF/UHF The 5/8 wave antenna consists of a vertical radiator, a loading coil and colinear plane at the base of the antenna. The antenna will lift up and out of the socket all by itself at highway speeds! The antenna is unusable when it is laying down and most users need to defeat the hinge or constantly adjust the angle to keep it vertical. This antenna is a dipole antenns with a base connector that can swivel up to 90 degrees. 8 C oaxial 1/2 wave element =1/2 x 27. >> > Which antenna is better: 5/8 wavelength vertical or a J pole? >> >> Better for what? For example, a 5/8 whip would usually be better than a J > >Owen, I think the popularity of VHF mobile 5/8 antenna lies in it has >more gain than a 1/4 wl antenna and is easier to match to 50 ohms than >a. The WB3AYW MULTIELEMENT COLLINEAR ANTENNA. 145 Mc 5/8-wave vertical antenna by ON6MU At VHF, both the 1/4-wavelength monopole and the 5/8-wavelength monopole antennas are widely used. Lots of radio amateurs build their own verticals. Its Galaxy® design maximizes range and quality in a great looking antenna. My experience is with most of these. RDE5488A 450-470 MHz 5dB 5⁄8 Wave Closed Collinear. Super-J antenna. 132 - Double Bobtail Antenna for 20m. THE 5/8 WAVE VERTICAL. Several close pictures of the antenna are provided in an effort to clearly show the quality of construction used. The quarter wave vertical antenna is usually the simplest to construct and erect although I know a great many people who would dispute that statement. The most common dipole length is half the wavelength. The inverted-cone vertical antenna has similar RF characteristics as the VOBA antennas. For instance, a half wave vertical can be stated as having 3db of gain over a quarter wave. The 5/8 wave antenna also has a net loss over a λ/4 (quarter wave) ground plane with drooped radials. Harsh environments do not affect mechanical or signal integrity. 25 feet 3 inches, UHF female connector. Other wire antennas: Design your own dipoles and inverted vees: Design your own dipoles and inverted vees (Metric) Design your own ground plane: Design your own ground plane (Metric) Design your own half wave vertical antenna: Design your own 5/8 wave vertical antenna: Design your own quad. Handles 500 Watts. The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators. Electrical and Electronics Engineering: VHF Vertical Antenna Ham Radio Antenna Wifi Antenna Radio Wave Radio Frequency Wi Fi Receptor Electronic Engineering Radios Electronics Projects More information. Its Galaxy® design maximizes range and quality in a great looking antenna. 5/8 Wave over 5/8 Wave over 1/4 wave 7. 0dBd 5/8 Wave over 5/8 Wave over 1/2 wave 7. Just saying I do not see how a coaxial collinear can have 30 db of gain, my cushcraft 13 element yagi only has 15. I agree with one thing Richard said about height and a 1/4 wave. The W5GI Multi-band Mystery Antenna is a fundamentally a collinear antenna comprising three half waves in-phase on 20 meters with a half-wave 20 meter line transformer. CO LINEAR ANTENNA DESIGN While it is not possible to home-brew a commercial quality antenna, it is very feasible to build a collinear antenna for average use. The Style 399-1M is the same as the 399-1, but it has a special sleeve for mast mounting. The measurements below are for building a simple Dipole Antenna. 5λ/8 vertical antenna gain. The V-6R antenna is based on 2 collinear 5/8 wave radiators. I do have a small amount of the RG6 cable being used in the vid (he could do with a good kleenex tissue for his nose too so I hope the antenna performs better than his snoz) and I'm thinking I may try to make one of these antennas just to see if. 5 ANTENNAS AS ELECTROMAGNETIC CIRCUITS A symbolic transition between a waveguide (transmission line) and an antenna is shown in Figure 1-5. I've been reading up on 1/4 wave ground plane antennas to build for 2meter and 70cm. A professional quality antenna in a compact package. Collinear Antennas A collinear antenna is 2 or 3 radiating elements stacked on top of each other separated by a phasing coil to increase gain 5/8 Wave over 1/4 wave 5. The main category is Collinear antennas that is about Collinear antennas. The average 5/8 antenna is ruined by using 1/4 wave radials. This calculator will help you to calculate the different wavelength of antennas based on the frequency. Door het juiste LC netwerkje (2x C en een L)  te plaatsen is het mogelijk een dipool antenne voor 2 frequenties te gebruiken. Antenna radiation performance is usually measured and recorded in two orthogonal principal planes (such as E-Plane and H-plane or vertical and horizontal planes). The most common dipole length is half the wavelength. com Sigma 4 1. Using left over segments of 12 AWG solid copper wire, a section of plexi-glass sheet, some zip ties and a fishing pole I have a great emergency antenna for 2 meters with significant gain when. It is a multi-element, stacked half wave vertical with gain on the order of that claimed by the Japanese verticals, single band only. 1 on everything RF. 8 = 11 cm Tests Results for these antennas WITH Amplifier will be posted when completed. BLR-6GCC is 4x5/8 vertical omnidirectional Ground Plane Antenna. If the eight ½ wave coaxial elements result in an antenna too long for your liking (over seven feet), then it is okay to use four ½ wave coaxial elements but the SWR may be slightly higher (Attach four ¼ wave vertical ground radials at the antenna feed point to help lower SWR. The approximate gain in the H-plane of the Slim Jim is from 1. 0dBd 5/8 Wave over 5/8 Wave over 1/2 wave 7. 5 GHz Ground Plane Antenna. 00; Description: The 5/8 wave 20 meter vertical is a 40 to 43 foot long antenna hand made from heavy duty t-832 tubing. The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators. Built my first antenna and doubled my coverage. 1 NOTE: This excellent antenna is still available from Hustler. 3", 44 lb, including mounting brackets). Discussing antenna patterns usually involves a reference to the antennas beam width. 12 ÷ 15 dBi has been comprehensively introduced. First add a ¼ wave element to the top of the antenna as shown in Figure 3. Some RG-8 and RG-213 guts will sleeve into the 5/16" tubing very nicely. 50 Mc 1/2-wave vertical antenna - Ham RadioAntennas __ Designed by Guy Roels ON6MU. Features: - Omnidirectional 3/4 colinear design, no tuning needed. Hold on here, just wait! Solder together the 8 sections you cut. The Double 5/8 is a natural extension of the Single 5/8 and uses a 5/8λ element for both the top and bottom radiators. Construction time can take as little as a few days up to a few weeks, depending on your drive and. 3uH for D/d=4000 the ratio of lenght and conductor diameter does have influence on the inductance the thinner the conductor the higher the inductance. I do have a small amount of the RG6 cable being used in the vid (he could do with a good kleenex tissue for his nose too so I hope the antenna performs better than his snoz) and I'm thinking I may try to make one of these antennas just to see if. 2 Meter vertical with 3 dBd gain derived from the famous extended double zepp antenna design. 4 (a) Vertical collinear antenna array (b) Horizontal collinear antenna array Increase in the length of collinear arrays increases the directivity: however, if the number of. Architecturally, the V-Collinear antennas may be classified under the category of vertically oriented/polarized, co-phased, co-axial stacked. Vertical beam downtilt can also be applied into the calculation and construction of the antenna. The best RF transmission system consists of matching impedence across all sections. Omni Antenna, Full Wave Dipole, 1. The swr is. The antenna appears to be a type of center-fed collinear but does not require any sort of matching hardware when fed with 50 ohm coax. Shakespeare 5/8-Wave VHF Antenna 9 Feet 6 Inches (399-1M) The Shakespeare Style 399-1M VHF 6dB Collinear Phased 5/8-wave antenna has two coaxial chokes to suppress cable radiation. 133 - Collinear Zepp Antenna. This is the reason the collinear base antennas have such high low angle gain, is because they are not electrically a 50' long antenna, but rather two 5/8 wave CB base antennas stacked on top of each other. The swr is. about a multiple segment collinear tested at 8, 6, 5 segments. However in broadcasting monopole antennas 5/8 = 0. Like all collinear's it is sensitive to near by objects. At 150 MHz, this would mean that a whip antenna, approximately 0. 25 feet 3 inches, UHF female connector. The directionality can me made even greater by coupling multiple 1/2-wave or 5/8 wave elements together in the right phase relationship (collinear antennas). The "extension" being an extra 1/8 wavelength added to the Zepp (on each side). This video is unavailable. 500 Watt enclosed coil and 2 sets of 1/4 wave radials which provide complete mast decoupling and optimum pattern and gain. Radiating elements are made of brass. Motorola mobile parts Motorola Mobile Antenna and Mounts with Mini UHF connectors. The J pole has a quarterwave matching stub. One common type of antenna, especially for VHF (2 m range wavelengths) and/or UHF (70 cm range wavelengths), is the so-called collinear antenna. pattern is skewed up off the horizon. It is possible all the hype over 5/4 wave antennas is reinforced by the fact they will still work with weak gain tricking the user into thinking it is a superior antenna just because it has 5/4 wave in its title. That is the best reason for using the 5/8 antenna. Vertical Omnidirectional Base Station Antenna, 37-54 MHz, Aluminum, 6. NEW-TRONICS ANTENNA PRICE SHEET Model MHz Gain Connector Description Retail VHF and UHF Mobile Antennas MX-2 144-149 3dB PL-259 Base Loaded 5/8 Wave 44. The swr is. I read most of material on the net regarding colinear made of the LMR-400 cable and such. Unpack Midland Energy New 5/8 BASE Antenna Shockwave Antenna by BM Technology 5/8 Groundplane Closeup. For example, with a 5/8-wave ground-plane with eight decoupling radials below the coil and ferrites on the coax feed-line at the antenna (a Dominator 5/8-wave from Norwalk Electronics), chimney mounted at 30 feet above ground, radials three feet above the chimney, there was no problem running 100 Watts simplex or on receive only, but when. An Omni antenna radiates 360° in the horizontal plane. This antenna is a dipole antenns with a base connector that can swivel up to 90 degrees. Calculate the required dimensions for a coaxial collinear antenna construction for any given frequency. Adding a coil in series with the antenna at the base is one such method of matching. When using a multi-band antenna (collinear over 5/8) I was less happy but it still did better than a unity gain on either UHF/VHF. 00; Description: The 5/8 wave 20 meter vertical is a 40 to 43 foot long antenna hand made from heavy duty t-832 tubing. (Mast not supplied). Modifications void your warranty (especially radio MARS/CAP modifications). 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.