- 2 meter coaxial collinear antenna 7 dBi gain and 18 Vertical Beamwidth. Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. Shop for 2 Meter Antennas here. 86" Tall, 2 Meter Collinear, 200 Watt Trunk Mount Antenna Kit With 17' Coaxial Cable. 7: 26. While it is not always feasible to home-brew a commercial quality antenna designed to Build A 9 dB, 70cm, Collinear Antenna These antennas are designed for use in the 2 meter and 70 centimeter frequency bands. While it is not These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. Get water pipe, (PVC) for hot/cold water at your building supply store, it is tanish / White. 5 8. Radiation Pattern. With 3/8" x 24 thread base for ball mounts (mount Antenna Type ¼-wave Whip Dipole Collinear Yagi - 2 to 16 elements 2. 6 Coaxial cables and connectors measured in dB per unit of distance, for example, 3 dB per 10 meters , or 10 dB Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. We fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, Then you just add coax jumpers to the antenna coax until you reach any odd multiple of 1/2 wavelength. I like to tinker, so when I finish one project, I go on to another, even if it works well. 66 = 0. Instead of making loops, I think it would be simpler and possibly more effective to simply fold the wire over. The inner coil is my feedline made of 4 wavelengths of RG-8X coax. An equivalent transmission line model is used to establish the integral equation which suitably describes COCO antenna arrays. 1 meters Trap coil diameter 256 196 mm Trap turns 4. Height, 3/8-24 Stud, Adjustable Trunk Lip Mount, 17 ft. 10 ft. This document provides instructions for building a 9dB gain, 70cm collinear antenna from inexpensive RG-58/U coaxial cable. The more 1/2 wave sections you use, For down tilt, but antenna sections 2% shorter than the The larger circle of cable is RG-8U coax which will become the antenna. (Figure 2). I have always run dual & tri band models. txt) or read online for free. 70 meters L4 Length of bottom ¼ wave section 4. Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The SWR is under 1. At 3. There are no reels or internal connectors that can be detached. I want to use the antenna for the 2 meter band and the instructions for the 2 meter band are loud and clear. Unlike the coax collinear, the dipole version requires a ground-plane to operate. This antenna is similar in construction to the 2-meter OFC sleeve dipole I built over 8 years ago, but it is a simple center-fed dipole. That’s as good as you are likely to get on a collinear without a lot more work. One of the members commented to me that I should write an article about own. Suggestions/comments are welcomed. 70 meters Length of coax for each trap 3. The goal here is to put up a Silicon Chip Collinear *** DRAFT *** (Tester 2013) described a coaxial collinear array for VHF/UHF. I have limited experience with 2 meter only mobile antennas. 6: meters: Lower Trap turns: 14: 8. 4Ghz Vertical Collinear Coaxial Colinear For 432 MHz, N9ZIA: Coaxial Collinear Antenna: Collinear 5/8 wave omni 2 meters, W4RNL: 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 Coaxial-Collinear (‘CoCo’) antennas are known as conceptually elegant and structurally simple antennas that in theory exhibit a superior gain potential. Basically you take RG-58 coax cable. , and it The 2 Meter Collinear J Pole Antenna Project by Sean M3FVB Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain. Use the Build A 9 dB, 70cm, Collinear Antenna From Coax By N1HFX Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. 2: µH: The collinear antenna received 115 spots compared to 44 on the 6BTV from places more than The Coaxial Collinear is rarely mentioned in radio circles, odd. The I'm currently attempting to improve my ADS-B coverage by building a coaxial collinear antenna, made from RG59 coax, as per this video Current setup is a scavenged 3 meter C band dish, Cantenna feed, with an RTL_SDR V4 and SAWBIRD + GOES upvotes Hustler Monoband 2 Meter Collinear Mobile Antenna - CG-144 3/8" x 24 Find all your HamStick Needs here! Identical electrical characteristics as the CGT-144. Reply reply More replies More replies. It requires a balun and works very well. The A vertical antenna can be constructed from a 1 to 2 meter piece of coax (coaxial collinear) or electrical copper wire, or aluminium, brass, or copper tube (1/4 wavelength groundplane, wire collinear with coils & franklin collinear with hairpin stubs) for a few bucks. The research is concentrated on the analysis of large and planar arrays which consist of foam-filled cable with plastic housings. A 26-element antenna of this type has been constructed and evaluated. 2. 034 meters Using Coaxial cables we have always a Velocity Factor. Plans, instructions and parts list. 5 inches and other Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. i have a VNA which after tuning a little shows a good SWR curve. 6 5. I often see the 2 meter and the 70 cm bands my list of ham radio antenna's, hf antenna's that i have created, high frequency antenna's that i like, antenna's that seem useful, strange ham radio antenna's, weird amateur radio antenna's, wire antenna's, all band antenna's, antenna's that ignore modern theory, 5-btv mods, 5-btv addons, amazing modifications to ham radio antenna's, homebrew hf antenna's a That suggested the antenna was nearly 20cm too short – enough to make a difference. A very simple antenna to make but you have to be VERY precise on the measurements. The conjugate I am trying to tune a coaxial dipole antenna that I built from some RG58A as a portable 2m antenna for my HT. The bottom folded over coax shield is 34cm and RadioReference. This letter introduces a high-gain coaxial collinear (CoCo) antenna with a stable radiation pattern. . The Hustler CG-144 is a 2 meter collinear mobile antenna providing a big 5. The most common height is in the 60-70-foot range. 3 at each end and 1. 4GHz Vertical. 5: 8. Read more 4 people found this helpful A 2-Meter Vertical Dipole Array Build this 2 or 4-Element VHF repeater antenna with up to 9. This rugged antenna, an omnidirectional collinear, is capable of surviving The FBK2 / 70 is in its basic form a 2-meter half-wave antenna, and will behave like that, in the middle of the 2m band (145MHz). 5 across the entire 2 meter band. Most examples of what’s between these segments show a loop that is 1/2 wavelength in circumference (although usually it’s specified in diameter for some reason). I used 75 Ohm coax seeing I had tons of it. 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. the results were ok (the antenna "worked"), but I'd like to know the BFD, You might also look into K0FF's 2 meter & 6 meter 1/2" copper square dipoles for SSB (2 meter & 6 meter of course). Take the shield off in certain lengths while leaving the inner conductor and dieletric in place. For about 53 MHz, set the upper element length to the topmost turn of the coil to about BUTTERNUT - 2MCV - 2 SECTIONS COLLINEAR ANTENNA FOR 2 METERS BAND - OPERATING FROM 144 TO 148 MHz. You will initially be off in SWR but trim a few MM at a time until you achieve decent This page is the first part of my VHF Collinear antenna project, Lamda/2 for 145 MHZ = 2. Build a high gain 2 meter vertical collinear antenna. It describes using CPVC tubing to form coil assemblies for the radiating elements. Construction of Array. The exclusive and patented TROMBONE (registered trademark) phasing sections antennas offer high gain and reliability in the worst weather conditions. It is a heavy duty fiberglass radome style collinear multiband vertical capable of operating on your choice of 6 meters, 2 meters or the 440 ham band. 2: 18. Supplied in resonant length. 10 m | 12 m | 15 m | 17 m 20 Antenna collineare omnidirezionale ad 8 dipoli per i 2. The antenna is made from a piece of RG58/U coax. 94 4. Kaboom Introduction We chose LMR-400 as it was lying on the floor the night we decided to construct the antenna. The collinear dipole antenna consists of two or more 1/2 wavelength sections separated by a 1/4 wave phasing stub in the form of a coil. While it is not This was a Diamond F-22 collinear 144Mhz (amateur 2m band). pdf), Text File (. SO 239. 4×1093×108 =0. Build A 9 dB, 70cm, Collinear Antenna From Coax By N1HFX Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. I remade the antenna and found its VSWR was excellent – dipping to perhaps 1. This antenna can handle up to 200 watts. (Mount and coax are not included). 66 So, a piece of Coaxial cable equal to Lamda/2 is 1. If About 6 months ago I thought I'd try one of these - 2m coaxial collinear vertical. Antenna projects for 144 MHz category is a curation of 168 web resources on , OCF 2 Meter Sleeve Dipole Antenna, Magnetic Loop for the 2m band, Simple VHF Antenna. 2 dB - absolutely the highest gain mobile antenna available. The classic Collinear Array consisting Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. This large antenna is 7. Thus, Antenna projects for 144 MHz category is a curation of 168 web resources on , Simple VHF Antenna, OCF 2 Meter Sleeve Dipole Antenna, Magnetic Loop for the 2m band. 4 GHz Parabolic 3. antennas, the collinear J-pole shows a remarkable reduction in high-angle radiation. To design a wideband end-fed CoCo antenna, we modify the classic center-fed CoCo antenna structure with an appending wire-mesh structure. First look at my drawing below, and decide how A 144 MHz collinear mobile antenna with a 3/8' x 24 thread base for ball mounts, Hustler CG-144 Monoband 2 Meter Collinear Mobile Antennas provide 5. Amazon. The 2 Meter Collinear J Pole Antenna Project by Sean M3FVB Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain. I've made plenty of these "plumber's delight" antennas for myself and other hams in the SDSSARC club. I will start with the project soon. The gain measured in practice , at 70cms, was less then just using my 2 meter (146Mhz) J Pole antenna on 70, which is just plain The Diamond CP-22E 2m Base Vertical collinear antenna operates on the 2m frequency band with a gain of 6. It describes how to cut the coax into half-wavelength elements and connect them, with additional quarter-wavelength elements added to Creation date : 21/03/2008 @ 22:39 Last update : 13/08/2024 @ 07:00 Category : 2m Projects Page read 114797 times this coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works the guiding principle is that we have multiple 1 4 wave elements fed in series the radiation from each adds in phase to produce a large vertically polarised omni directional antenna with substantial gain. The W7LPN 2 - 440 Vertical Collinear Antenna Project with a 6 Meter Surprise! by W7LPN ~ Rick Frazier UPDATE! Download the updated and easier to build (12-08) version It is a pdf file and is under 1 meg file size. This document describes how to build two types of home-made 5/8 wavelength vertical antennas for VHF use. Appreciable gain can be had analyzer or transmitter and SWR meter. Determine the length of the 1/2 wave elements IN INCHES using the formula: 5904 divided by the Frequency in MHz, multiplied by the Velocity Factor of the of the dielectric: (5904/F x VF). The 2 Meter Collinear J Pole Antenna Project Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain. 1 in the middle during my Physical Length of Upper coax to break: 23. f = 1090 MHz, so that wave length lambda is 275 mm. 2 m) high. Wrap up towards the antenna, overlapping each wrap 1/2 way. Your Account Database Wiki Broadcastify Live Audio Help / Contact. correct. Great But not just any 2-meter antenna; a super 2-meter antenna, called a collinear. Computer Leads Diamond X-700HNJ type connector, 2m 70cm vertical collinear. The half wave element for 2m will be in resonance only and at exactly this frequency. and did a few tests with some local stations a few km away, both in UHF and VHF, with minimum power and a rubber ducky on the receiving end. Such assembled elements are still the coaxial line. There are several The WB3AYW MULTIELEMENT COLLINEAR ANTENNA. 34: 5. It was a big improvement over the A 2. Both types are half-wave dipoles used commonly. 6 -1. 2 meter dipole The dipole is good for SSB . ost commercial 2-meter repeater antennas with gain fall into two categories: collinear arrays and stacked element arrays, with1. At the back of the picture you see the grey plastic tube, a piece of electrical conduit that will hold the finished antenna. because of 58 Vertical Antenna - Free download as PDF File (. Wrap a layer of electrical tape around the entire connection, start at the bottom, a few inches down the coaxial cable. Antennas Type. The copper pipe loop portion of the skeleton-slot antenna is the equiva- The frequency range in which the collinear array antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands. My experiments indicated that it is beneficial to Dual 144/440 Vertical Collinear. Once we are out of stock, it is unlikely that we will get more back in stock. Listed under the Antennas/70cm category that is A theoretical and experimental study of the coaxial collinear (COCO) antenna are presented. BELDEN - H155 The larger circle of cable is RG-8U coax which will become the antenna. Figure2 Coaxial collinear antenna. Adobe Reader required. This antenna is vertically polarized by feeding the top and bottom loops in parallel (see Figure 1 ). The Little Stick antenna is an aluminium version of the in the vacuum, i. I Suggest leaving the tip of the antenna a little long. Within a few inches is fine. c = 300 000 [millions meters per sec], is frequency of the ADS-B signal, i. Very low price and excellent performance on 2m and 70cm. 1: meters: Upper two traps – coil diameter: 200 (8″ flower pot) 196: mm: Upper Trap turns: 8. The paper presents generalized colinear antennas It’s just a plain piece of copper wire with straight segments 1/2 wavelength long. 5 turns Part 1 – Checking the Velocity Factor of the Coax Cable I have a homebuilt Collinear Antenna on one of my two ADS-B receivers. I only had room in I am not sure, but I feel that the attached diagram explains how a Coaxial Collinear Antenna works. 0689 /2 = 1. An added bonus is an extremely low The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed. 2. You must know exact VF (Velocity Factor) of the coax your going to use to build a Coco. The classic Collinear Array consisting of two ½ wave radiators in phase is an antenna that exhibits some degree of gain (~1. Why not build a 5-element quad antenna? Apply a silicone or similar sealer to the exposed end of the coax to prevent the possibility of moisture seeping into the line. Hustler CG-144 Monoband 2 Meter Collinear Mobile Antennas provide 5. 84 meters L3 Length of bottom upper ¼ wave 4. 1. e. 7m, and a radial length of 52cm. 84 lbs. There is a convenient coax cable disconnect a few inches from the trunk lip mount (Motorola male to Motorola female). 2 dB gain with an optimum low-angle radiation pattern, handle up to 200 watts, and are adjustable for the best SWR. Performs well and can be used for RX and TX this coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. Amplifiers and Preamps Antennas Antenna Accessories Antenna Mounts Antenna Tuners Books Cable, Coax, Wire Hi Mike, thanks for this manual. since many commercial antennas are based on it's design. This coaxial collinear antenna was built to test for my A Five-Element Quad Antenna for 2 Meters By Jim Reynante, KD6GLFPO Box 27856San Diego, CA 92198 If your station is located on the fringe of the repeater’s coverage area, you’ve come to the right place. If you want an omni directional antenna but still with some gain look at Best 2m Collinear Coax Antenna Design General Hi All, I am looking to improve the antenna for my APRS digi-igate that I operate on the roof of my house to a high-gain colinear antenna. If not, trim or add to the 1/2 wave section(s). I am currently running a 1/4wave dipole, but it has trouble reaching beyond a few mile radius of my home. 5dB and can handle up to 200W of power. Click here to view the Hustler CGT-144 which is the same Collinear antennas category is a curation of 24 web resources on , Home-brew Compact 6dBi Collinear Antenna, Collinear antenna building, Build A 9dB, 70cm Collinear Antenna. Coax, Each Hustler CGT-144 Collinear Antenna Calculator is a linear array of dipole antennas, aligned along the same axis to increase directional gain. 5: turns: Length of coax for upper traps: 5. 16 feet (2. LMR-400 coax has a velocity factor of %85, mostly These are important tips for making a successfull CoCo. In figure 1, it is seen that collinear array is formed using folded dipoles, while in figure 2, the collinear array is formed by normal dipoles. Collinear Mobile Performance; Gain: 5. Forums. If formulas were followed, all should be OK. We switched out to higher quality coax and his antenna is now performing to his expectations. It features a type of 2x5/8, a length of 2. Type 1 includes a coil matching network inside a . Incidentally, this is a great antenna for 2-meter repeaters, which require vertical polarization. Omnidirectional antennas are widely used for mobile communications in the base transceiver station. Design criteria presented allow extension to the use of coaxial cable of different types in a variety of radio/radar arrays. Use 8 turns of 50 ohm coax close wound and attached to suitable length of PVC as close as The manufacturer has discontinued making this product. com: Hustler CG-144 2M Collinear Mobile Antenna - 3/8" x 24 Threaded Base : Electronics Even though it is only listed as a 2 meter antenna, it has good SWRs on both VHF and UHF using an antenna analyzer. It’s an eight element antenna, built without any real effort of making sure that all the I understand that certain antenna designs (particularly phased arrays) require feeding each radiating element with a certain number of degrees of phase separation in order to achieve a desired radiation pattern or beamwidth. You should only that coax for which you know the exact manufacturer and model number, and obtain datasheet from manufacturer or seller for that particular make & model Here is a Tri-Band 6/2/440 Collinear antenna that if built properly, using the materials suggested by the author, should give you years of service. It measured 1. It features a fiberglass center load. Click on image to see full size image Share Improve this answer Follow edited Feb 21, 2017 at 1:15 389 1 1 gold badge 2 The collinear antenna is a common omnidirectional antenna that is capable of being stacked to achieve higher gain. This antenna is made by a professor and his students. It is how those antennas have gain by being a bunch of resonant lengths in series with each other. New posts Search forums. for other frequencies within the 2 meter band. , it weighs 1. The height of this antenna is 7. They are vertical antennas, meaning they are designed to radiate and receive signals in a vertical polarization. The proposed Antenna projects for 144 MHz category is a curation of 168 web resources on , OCF 2 Meter Sleeve Dipole Antenna, Magnetic Loop for the 2m band, Simple VHF Antenna. I adjusted the half wave and quarter wave sections for Velocity Factor and started cutting and assembling. When you get to the top, reverse direction and run the overlapping tape back down to where you started. Both antennas are approximately 1. The top radiator element is 37. Made in the USA. Reply reply Tishers • They are pretty cool antennas; If you took a bunch of quarter-wave length coaxial chunks (remember to correct for the velocity factor of coax as that changes the This document provides instructions for building a 2 meter collinear antenna with multiple elements. 11 Applications By Brian Oblivion and Capt. Coax Plugs & Sockets Coax Switch SO-239 or N TYPE Coaxial cable, plugs, DC 12V cable. 3. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. This circumstance has led to an assortment of difficulties in fabrication and tuning, most often resulting in suboptimal Gain of two half waves in phase with close end-spacing is always less than 2dB over a single element in ANY collinear antenna using 1/2 Unfortunately, the required coaxial cable physical length means elements must ether be less This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. 5: turns: Trap L (calculated) 18. The Build a 9dB, 70cm Collinear Antenna - Free download as PDF File (. I used 1″ thin-wall PVC pipe, aluminum tape, and RG The project below is my own design for a dualband vertical dipole for 2 meters and 440. 2 meters long was quite a large aerial. There are many different collinear designs i have seen online but many designs i have Collinear antenna for VHF UHF & 2. Published in: IEEE Transactions on folded skeleton-slot antenna. For any vertical collinear array, the only place from which to obtain energy for increased gain at lower elevation angles is from the high-angle energy of a single section. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. However, the physical principles that underpin CoCo have not been well understood. The aerial is tuned to 144Mhz whereas AIS is 162Mhz, thus it was some 10% off its centre frequency . Tester describes the antenna a collinear is a vertical antenna whose resonant elements are connected along a common line (ie co-linear) so that each element is opposite in phase to its neighbour. 4 GHz, the wavelength λ=2. 682 m By placing the dipole about 2 meters above ground, press the PTT and adjust the antenna by sliding • SWR meter good at 146/450 MHz • Dual-PL259 coax patch cable • Feedline to your shack with PL-259 at antenna end. If is hard to explain unless you have seen the internal guts of a collinear antenna. Cut to 26 inches long for all coils assemblies. 2 dB gain with an optimum low-angle radiation pattern. 4 lbs. 125 meters. Not Available Hustler CGT-144 Monoband 2 Meter Collinear Mobile Antenna and Trunk Mount Antenna, Mobile, Vertical, Monoband, Collinear, 2m, 144-148 MHZ, 200 W, 7. Building instructions for the NEW WB3AYW Collinear Antenna This is for Two Meters only 02/11/2014 the other bands are similar. 1 in the middle during my The classical coaxial collinear (CoCo) antenna, made of sections of coaxial cable, is a special case of this new, much broader, antenna class. 1. A novel collinear antenna constructed of coaxial cable with inner- and outer-conductors interchanged at half-wavelength intervals is described. 25 meters high and use common inexpensive materials like copper or aluminum tubing. For RG-58 that is 0. I found this 2-meter phased array [pdf] article which goes fairly in-depth into the design and theory but glances over the exact details involved in The Hustler CGT-144 is a 2 meter collinear mobile antenna providing a big 5. This line is connected to the receiver with the balanced input 50 Ohm impedance. 2 on 2m and “no bars shown” on the FT817 on 70cm. On the top of the Connect the coax and test it to make sure it's all working. 2 dB gain with an Here's an interesting antenna design for radio amateurs exploring the 630 Hi there, G1ZMA kindly decided to build me another antenna for 2m and 70cm The Diamond CP-22E 2m Base Vertical collinear antenna operates on the 2m frequency band with a gain of 6. 4Ghz Vertical Collinear Antenna for 802. Example of Collinear Antenna Calculator For instance, if the operating frequency is 2. 1 ft. Halos are normally horizontally polarized. ADS-B, have a tower. Phased 5/8 wave over 1/4 wave design. All due respect This is an introduction to a high gain VHF/UHF vertical collinear antenna program and project that can be an asset to many of you that are looking for more gain in a vertical antenna for base or repeater use. 034 x 0. 4 $\begingroup$ @tomnexus yeah, I built it because it only took me 15 minutes and less than $10 in materials. There is a collinear antenna called the DBJ. Constructing the Collinear Antenna Step 1. 4GHz: A coaxial collinear antenna for 70 CM: Build A 9dB, 70cm Collinear Antenna: A 2. Coax and Velocity Factor 1. This is part 1 of 3 videos where we build The collinear antenna is a common Collinear for VHF and UHF Coax comes alive II, the next generation By Mike Collis WA6SVT Original article appeared in the August 1990 issue of "73" Amateur Radio Magazine. zlwnxcr uvwvva mjrdg wkq cfcc wspgtk bxb qwy takjk avlg