Collinear vhf antenna design
Collinear vhf antenna design. 18. Hustler CG-144 Monoband 2 Meter Collinear Mobile Antennas provide 5. Omni, Meander Collinear, 4dBd, 160-174MHz, PIM Rated. Making an inexpensive 1090MHz ADS-B collinear antenna. A Dual-band Whip for 145/435MHz. The Long-Wire Antenna. Aug 14, 2015 · Balanced antennas, based on the dipole design, don’t require a ground plane, this would include half wave antennas, J-Poles, Yagis, and beams. 34 m and On most of the J Pole designs out there, a choke should be used as close to the feedpoint of the antenna as possible to help prevent rf on the feedline and creating difficulty with SWR readings. 250 Watts. With in-depth research, we illuminate the complexities of marine VHF antennas, from whip to collinear Collinear dipole coil. First add a ¼ wave element to the top of the antenna as shown in Figure 3. The size is an inverse of frequency, so a bowtie antenna for 200 MHz would be three times the size of one for 600 MHz. Enables the antenna to maintain the same strength as one with one piece structure. The COL8 is our most popular and widely used UHF base station antenna. Best performance is achieved if you run the feeder coax 90 degrees to the antenna for about 3-4 feet at the feed point. 40 m (8’) collinear-phased VHF antenna with FME termination, designed to ensure excellent performance in terms of quality, performance and design. This link has been on our site since Wednesday Jul 23 2008, and it has been clicked on 11212 times. May 30, 2021 · This is post 2638 in a continuing series of simple ham radio antennas. 53/10. High gain and omni directional pattern of fiber glass coaxial antenna. The author of that video has now posted on his blog a tutorial on how he made the coax collinear antenna. 20 m Vertical Antenna Type. The vertical element and radials are 3/32 or 1/16-inch brass welding rod. Jan 20, 2021 · Mast Mountable J-Pole Antenna. This antenna features rugged construction and a tough fiberglass radome making it ideal for use in harsh outdoor conditions. Building a 2. 2). Mar 13, 2023 · Ed Fong-Collinear Antennas; How to go bicycle mobile on the 160m ham band VK3CMC. 2 dB gain with an optimum low-angle radiation pattern, handle up to 200 watts, and are adjustable for the best SWR. Southwest Antennas Part # 1085-163 is an omni-directional 2 section collinear dipole antenna that operates in the VHF band from 118 - 137 MHz and offers 4. yagi antenna for 2 meters band 2 Meter J-pole from 450-Ohm Ladder Line Great first time J-pole project. A Folded Dipole Antenna of length L. Check out the video tutorial below. 1dBi, this antenna offers high performance for VHF applications. V-2R antenna pdf manual download. June 17, 2015. (See older version here) 3 element = 7 dBd Gain. This type antenna design is common of HF transmitting antennas and VHF/UHF television receiving antennas. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have typified the construction techniques in high gain collinear antennas. Features: Excellent bandwidth providing full band coverage Internally DC grounded for lighting protection and reduction of precipitation noise Low -150dBc PIM performance and excellent 25kW PIP rating Patented Meander PCB design for optimum RF stability antenna design details as closely as possible. By using the same principle, other structural designs can be devepoled. Because the folded dipole forms a closed loop, one might expect the input impedance to depend on the input impedance of a short-circuited transmission line of length L. Details. VHF Meander™ Collinear, 0dBd, 140-150MHz. 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 M3FVB VHF 8db An Easy Dual-Band VHF/UHF vertical Antenna made with a TV twin lead and coax cable Simple j-pole antenna for 2 meter how to build a J-pole antenna for 2 meter band with many photos ecc. Protects radiating elements in corrosive environments. The PD220-DT is both reduced to 5. To design a wideband end-fed CoCo antenna, we modify the classic center-fed CoCo antenna structure with an appending wire-mesh structure. The dipole and the quarter-wave stub is the building block of these antennas. 3. Compared to other traditional antennas, this antenna deeply differentiates The PCTEL ASP7455 Mosaic vibration-resistant collinear antenna with spring provides exceptional coverage in the VHF (138 – 174 MHz) frequency band. Oct 31, 2022 · Broadband collinear antennas for VHF-UHF bands have a complex design, high cost and are used mainly in military radio communication systems (Harris, Aselsan and others). by Sean M3FVB. This antenna project will allow you to design a collinear antenna for either the 2 meter or the 70cm (440) ham band that will give you lots of gain using the calculator in the download. This letter introduces a high-gain coaxial collinear (CoCo) antenna with a stable radiation pattern. The colinear antenna is a series of stacked and phased half wave dipoles with a quarter wave section at the top and bottom. Â These are a few of the modifications I came up with. Minimizes possibility of intermod generation. SEC Antenna uses the very latest design and manufacturing technology methods to produce Fiberglass Omnidirectional Collinear antenna, having following features: Innovative design for unique quality of omni-directional monopole antenna. So far it received 29 votes for a total score of 6. 2. Jan 1, 2007 · Antenna arrays kno wn as collinear arrays (CollAr) are based on in-phase feeding of radiating. An Improved Version. The term "collinear" refers to an antenna designed to increase its gain. You can obtain approximately 3 - 10 dB of gain over a dipole, depending on the number of elements you use. Â The diagram provided is a more simplified version of the one I did. 4GHz Vertical antenna. 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. 4GHz Vertical antenna - Building a 2. 84 lbs. NOTE: This is not an antenna for the beginner antenna builder! If you fall into this category, please read the notes at the end of this article. Jun 18, 2019 · A monopole is half of that, with the other half in the conductive surface below the monopole. This base station antenna, devised by Bert Veuskens, PA0HMV acts as an end fed antenna on 145MHz with a gain of 0dBd, and two stacked 5 λ/8 radiators with a gain of about 5dBd at 435MHz [29]. This guide explores various antenna types for informed choices. 136 - 174 MHz. 301 Moved Permanently . It's usually mounted vertically, in order to increase overall gain and directivity in the horizontal direction. Figure 1. Making a Bending Jig The key to good results is to invest a little time in building a bending jig. Top Section - 5616 / FreqMhz = inches. The 5/8 wave antenna has about 3 dB gain over a quarter wave vertical. A 5/8 wave stacked j-pole antenna plan. . • Fiberglass construction. • Copper radiating elements. 11b/g wireless networking. 5 MHz bandwidth. SCL Model Series. 5 Kgs. 7 dBi gain and 18° Vertical Beamwidth. Maximum power input is 150 W. Fig 25—Simple ground-plane antenna for the 144, 222 and 440-MHz bands. Super J-Pole Antenna (Collinear Design) - By KB0YKI VHF/UHF Antennas-- By KB0YKI -- J-Poles, Super J-Pole, Omnidirectional, Quads, Yagis VHF EggBeater Antenna - From ON6WG / F5VIF Quick and Simple 2 Meter Ground Plane Project Via HamUniverse 2M Yagis. permits the antenna to achieve high performance, high power rat-ing low vswr, and broader band coverage on both 2m and 70cm bands. 70cm, Collinear Antenna From Coax. Calculate the required dimensions for a coaxial collinear antenna construction for any given frequency. Original article appeared in the August 1990 issue of "73" Amateur Radio Magazine. Based on the fat dipole idea, the configuration of the classical coaxial collinear antenna is modified and an 8-section coaxial collinear antenna is designed. Drill the hole at the point about 1" away from one end (see Figure 1. A collinear antenna array (sometimes colinear antenna array) is an array of a dipole or quarter-wave antennas mounted in such a manner that the corresponding elements of each antenna are parallel and collinear; that Build a 2. VHF Meander™ Collinear Antenna 140-150 MHz - 4dBd, 4. These arrays are attractive for EME, tropospheric scatter or other weak-signal communication modes. Lengths and dBd gain. 8 mm). The collinear design is attributed to Steven Merrill KB1DIG. Request New Account Log-In. Enter the required frequency in MHz, the velocity factor of the coax From the basic development of the collinear design, there are numerous variations available today. SKU: COL54-160-P. The radiator is made from 2mm copper wire, formed as shown in Fig 16. Most 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. Such antennas can be combined in arrays of two, four, six, eight, or more antennas. According to The ARRL Antenna Book, an antenna four of approximately 3 dB (3 DBJ - UHF (perfect for GMRS) +5dB Gain Antenna – US patent 8,947,313 +5dB gain no radial collinear – featured in CQ magazine (Summer 2012) $65 (requires 37 inches of 3/4 inch 200 psi pvc pipe - Lowe's item number 23990) Accessories - please email or call so we know exactly the adapter you need. 2 Antenna mount and hole Dimensions. Clamp the junk-box section in vise to saw rod. Choosing the right antenna among numerous options can be daunting. When downtilt antennas are ordered, exact frequency must be specified. 5/5. au | 07 3393 9919 This antenna project will allow you to design a collinear antenna for either the 2 meter or the 70cm (440) ham band that will give you lots of gain using the calculator in the download. Antenna Experts specialized in designing and manufacturing of heavy duty vertical polarized super high gain fiber glass collinear antenna with variety of omnidirectional gain which start from 3dBi to 12dBi omni gain with frequency range start from 30MHz to The antennas include internal DC grounding for lightning protection and the reduction of static noise. Thanks to Clint of "Oxford Shortwave Log" for this coaxial collinear antenna system for 2m and 70cm. This base station antenna, devised by Bert Veuskens, PA0HMV acts as an end fed antenna on 145MHz with a gain of 0dBd, and two stacked 5 λ/8 radiators with a gain of about 5dBd at 435MHz [30]. Compatibility in terms of size, gender, and impedance matching is essential for a secure and reliable connection. A third type of collinear array, rarely seen outside amateur radio VHF/UHF applications, uses half-wavelength monopole elements with phasing coils between each consecutive The WB3AYW MULTIELEMENT COLLINEAR ANTENNA. The resource is currently on dxzone. Direct element joint structure with two interconnected FRP outer-shells. 6 Meter J-Pole Antenna A home made J-Pole antenna for 50 MHz, an amateur radio project by W8CWE 5/8 Collinear antenna A 5/8 wave stacked j-pole antenna plan New LMR VHF / UHF Outdoor Antennas covering 138-174 MHz, 380-470 MHz, or 406-512 MHz. Matching Section - 2808 / FreqMhz = inches. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. I was trying to increase the overall performance of the J-pole, in this design. VHF Meander™ Collinear, 6dBd, 150-160MHz. 58. , and it mounts with its 3/8 in. The 5/4 wave antenna discussed is really a full-wave antenna with a 1/4 wave feed. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have UHF Meander™ Collinear, 5dBd, 470-490MHz. Getting Started: First look at my drawing below, and decide how long an antenna you want to have up, approximately. A collinear antenna means that it is actually more than one antenna stacked on each other, but 1) all working in line with each other and 2) all in phase with each other. The YT clowns have probably never heard of antenna modeling. It's a good choice for repeater installations and can be top, or side mounted to the tower. It only requires the prolific imagination of the experimenter. This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. The master craftsmanship of the ethafoam spacer 5/8 Collinear antenna. Excellent bandwidth providing full band coverage Internally DC grounded for lightning protection and the reduction of precipitation noise Patented Meander™ PCB design for optimum RF pattern stability Industry leading PIM ratings (-150dBc) providing low IM and low A folded dipole is a dipole antenna with the ends folded back around and connected to each other, forming a loop as shown in Figure 1. It is made from a 1/8'' thick aluminum plate cut to 2'' x 6''. Chapter 18. This style of collinear antenna is usually housed in a fiberglass radome, to provide both support and environmental protection to the relatively fragile coaxial elements. Build a random wire end fed antenna and make amazi Receive Antennas-This is my Loop On Ground (LoG) 20M Vertical Dipole-Amazing Performance-T2LT Design; Invisible 5-Band HF Antenna; Your First Antenna--The Inverted V Dipole-Ham Radi Meander™ collinear antennas has been specifically designed for wireless applications requiring high performance, broad bandwidth and exceptional PIM and PIP specifications. Note a coax balan is recommended, this is needed to keep current from the antenna off the feed line and back to the TX unit. With the dipole elements being printed The Comet GP-285 VHF 5/8 collinear antenna is a new addition to the market, designed for frequencies ranging from 135 MHz to 175 MHz. At 6 meters a wire four wavelengths in many locations. Gain. Antenna designs can be scaled to other frequencies. 3-10. 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. The diameter Mar 16, 2019 · WF-65 takes smaller mini 4. The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4. 0 dBd gain and 1. This twin coaxial is used for B-Sky B /Sky HD tv installs. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave parasitic element (also called coupled resonator). The collinear dipole, unlike the coaxial dipole requires a ground-plane to operate. Depending on the materials in your "junk box", you could build this VHF/UHF antenna for almost no cost. 6dB colinear VHF antenna. , it weighs 1. The document has been permanently moved. Old TV Antenna Scheme. The commercial grade antenna is great for hardtops, T-tops and other locations aloft where the compact size can deliver reliable communications via VHF radios. As we any good thing there are diminishing returns by adding more co-phased antenna pieces. The COL8 is a series fed collinear which is custom tuned to user specified frequencies. Although this design is not ideal for a 'pipe antenna' it is ideal for mounting in any antenna mast. com in 2 categories. The 3/4 wave plot shows the development of high angle lobes and lower gain at the horizon when the antenna is too May 17, 2013 · Homemade ADS-B Collinear Antenna. It has a special stainless steel ferrule for ruggedness, beauty, and very easy installation. 2 Meters. The key is understanding each type’s unique features. Gain at 10° elevation (dBi) Gain at 30° elevation (dBi) Radiative Efficiency (%) Optimized Vertical Collinear 30 m high. It measures 3. Amazing what you can achieve with a metre and a bit of old RG58 an 4' (1. 10 ft. An added bonus is an extremely low angle of radiation! On-line antenna designer. Description. A 2-Meter Vertical Dipole Array. 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. Build a 2. 50 Ohms. Omni, Rugged Meander Collinear, 0dBd, 140-150MHz, PIM Rated. sciencewriter. Availability. SKU: COL51-150-P Category: Meander Collinear. • DC grounded. VHF Collinear Gain Vertical For 144-148 MHz. The 2 Meter Collinear J Pole Antenna Project. The proposed CoCo antenna's $-$10 dB impedance bandwidth Collinear Dipole Antenna Calculator. Rugged Design. Ensure that the connector on the antenna matches the connector type used by your radio or transmission line. VHF antennas typically come with different connector types, such as BNC, N-type, or PL-259. The vehicle antenna has a 3 dB gain performance. The patented Meander™ collinear element design allows multiple half 2 Meter J Pole Collinear Vertical - Field Day Portable. Building instructions for the NEW WB3AYW Collinear Antenna. By Mike Collis WA6SVT. Above images show a prototype collinear dipole built for 1090 MHz using this antenna calculator. 43. The Basic Super J Pole Antenna. 5 element = 9. Â Mounted a so-239 to a split piece of copper tubing, that took the place Oct 19, 2022 · The frequency range in which the collinear array antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands. 25in or 6mm, up to 3/8-in or 8-9mm. Fig 26—A 440-MHz ground-plane constructed using only an SO-239 connector, #4 Southwest Antennas Part # 1085-172 is an omni-directional 6 Section Collinear dipole antenna that operates in the VHF band from 161- 168 MHz and offers 8 dBi of peak gain. 4GHz vertical collinear omnidirectional antenna. The 49 in whip antenna features a black UV stabilized base that will resist chalking and provide long lasting operation. The J-Pole antenna’s long and storied design history is due for one more chapter to mitigate the longstanding mast current and reliability issues. This link has been on our site since Friday Jul 30 2004, and it has been clicked on 63414 times. The Shakespeare 6400-R Phase III VHF Antenna is a high performing, 4' VHF antenna infused with the quality of Shakespeare's incomparable Phase III™ electronic elements. 52/10. http://www. More complicated Yagi-Uda antennas consist of a reflector and many directors to improve gain. Submitted by Gary Ruehle. COL54-160-P Features: Meander™ collinear antennas has been specifically designed for wireless applications requiring high performance, broad bandwidth and exceptional PIM and PIP specifications. Mount and coax not included. Conclusions. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have Feb 12, 2018 · This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802. Also, this design is for two 5/8-wave antennas (hence the name two-element) that are in phase with each other, Hi there, G1ZMA kindly decided to build me another antenna for 2m and 70cm and here it is. At VHF and UHF, it is possible to build Yagi antennas with very high gain—15 to 20 dB—on a physi-cally manageable boom. The stainless steel mounting hardware is supplied with the antenna. It is important to remember that vertical collinear and J-antennas must be placed either on the top of the mast or placed at a distance of at least 2λ from it. Earlier in the week a video comparing a Discone to a Coax Collinear antenna for ADS-B reception was posted. The height of this antenna is 7. Jul 14, 2021 · In this study, a collinear antenna designed by applying a flat broadband dipole operating at 915 MHz [19][20] [21] is used. Yagi-Uda antenna 10 element Yagi VHF-TV antenna (10 dB gain) Yagi-Uda antenna 13dbi Yagi 806-939 MHz Cellular Antenna Jan 10, 2023 · Pasternack's new VHF/UHF dipole, collinear and Yagi antennas are in-stock and available for same-day shipping. The inner core is quite fragile and this cable needs to be stripped and terminated with care. The ring gasket makes the antenna water-proof, and 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 9 element yagi for 2 meters band A simple design of a 9 elem. Designed for reliable performance in all environmental conditions. For inquiries, contact View and Download Hy-Gain V-2R instruction manual online. For inquiries, contact Pasternack at +1-949-261-1920. Jul 4, 2014 · Here's a popular antenna design for repeaters. -24 stud. inductance, J-Pole, Simulation, stub, UHF, VHF. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have The RA1225FME is the new 2. Although 3/32-inch rod is preferred for the 144-MHz antenna, #10 or #12 copper wire can also be used. The radiator is made from 2mm copper wire, Fig 16. If your commercial whip is only a half wavelength long or less, then it is just a monopole whip, and not a colinear. So far it received 108 votes for a total score of 5. It can handle up to 500W of power, making it suitable for various communication needs. Dec 16, 2008 · Whether a hairpin or helical resonator is used to phase the 1/2 wave antenna “pieces,” improved performance awaits the antenna builder. Sep 22, 2015 · It is possible to build a 4-bay bowtie antenna for VHF-High, but it would be three times as large as the UHF version. Drill the bracket. COL43-490-P Features: The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have typified the construction techniques in high gain collinear antennas. 56: Quarter wave groundplane antennas. This ground-plane collinear design is superior This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. The GP-285 antenna is a sturdy and reliable option for base stations. A collinear (or co-linear) antenna is an array of dipoles mounted in such a manner that every element of each antenna is in an extension, with respect to its long axis, of its counterparts in the other antennas in the array. elements that are lined up serial and their radiation is typically omnidirectional perpendicular to A collinear (or co-linear) antenna is an array of dipoles mounted in such a manner that every element of each antenna is in an extension, with respect to its long axis, of its counterparts in the other antennas in the array. With the dipole elements being printed on a single sided PCB the susceptibility to Out of stock. These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. Main category is Collinear that is about Collinear antennas. This is for Two Meters only 02/11/2014. For receive only, no balan or current choke is needed. net 18-22. Call or email RFI to place an order at (330) 486-0706 or sales@rfiamericas. 0mm F connectors. Meander™ collinear antennas has been specifically designed for wireless applications requiring high performance, broad bandwidth and exceptional PIM and PIP specifications. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have Nov 28, 2023 · Vertical radiation plots of 1/4 wave vertical (green), 1/2 wave vertical (fuchsia), 5/8 wave vertical (blue), and 3/4 wave vertical (brown) over perfect ground. Quick Specs and description. 4. A dual element collinear dipole gave me the same results as an eight element coax collinear. Antenna pattern is OMNI Directional. 10 element = 13 dBd gain. Cutting the All-Thread. Drill a hole in the plate big enough for the SO-239 VHF connector to insert into (about 5/8'' or 15. Fiberglass collinear antenna manufactured by Antenna Experts are among the world highest performance antenna with MIL-STD compliance. The scale is 1 - 10, with 1 being poor and 10 being excellent. With a gain of 5. The antenna is very robust and compact, and has a gain of approximately 5-6dBi. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without Drill 1⁄2”. Jul 14, 2021 · Omnidirectional antennas are widely used for mobile communications in the base transceiver station. But unbalanced antennas, like the vertical 1/4 wave, 5/8 wave, and collinear styles do need a ground plane to function properly. Use #16 solid wire or similar and solder it to the center conductor only. Typical tubing diameters for the 2m and 70cm bands are from 0. 5 dBi of peak gain. Now its time to add the additional elements to the top and bottom of the collinear array. Beamwidth -3dB. “Measure twice, mark well, saw once”. In-stock and available for same-day shipping. 8 MHz. Covers most of the basics. Steps to Success. Jul 1, 2019 · This paper presents a wideband high-gain coaxial collinear antenna with a stable radiation pattern. Custom Combiner and Multicoupler Design; Sold individually. We don’t usually think of long-wire antennas for VHF applications, but they can be used on 6 meters almost as easily as on the considered “long” until it is several wavelengths long. com. The higher gain antennas have a lower vertical beamwidth. 5/8 Collinear antenna. Affords lightning protection. By design, each antenna is constructed to exhibit a beam tilt of -2. The -10dB impedance bandwidth of the proposed antenna reaches 36. Measure from original ends only because threads on ends are normally good. VHF Meander™ Collinear Antenna 150-160MHz - 6dBd, 4. After measuring and before sawing, put 2 nuts on 71⁄2 “ end, one nut on 181⁄2” end. SKU: COL53-150-P. The patented Meander™ collinear element design allows multiple half wave elements to be stacked without the variations in cable lengths and mechanical joints which have Mar 19, 2023 · Those work ok on 2 m but on 70 cm the radiation pattern is terrible. Â I added a cap on the top end of the PVC. Building details of a VHF colinear antenna with 6 db gain. VHF Meander™ Collinear, 4dBd, 160-174MHz. 4 dBd Gain. Aug 27, 2017 · There is no magic to be found that going higher and adding the second collinear element can’t beat for a vertical design. Build this 2 or 4-Element VHF repeater antenna with up to 9. The suggested spacing between the short bottom matching section and the longer bottom section is about 3 inches center to center or about 1 inch between Aug 18, 2023 · Marine VHF antennas ensure reliable boat communication. Very high gain and low to horizon radiation angle. As the diagram shows below, this can be very simple and can be made out of scrap wood. Home / Products tagged “VHF antenna ANT125F2 Omnidirectional Collinear Antenna 118-138MHz $ 1,590. Design Features : AC6-150 Fiberglass Omni-directional Collinear Antenna is VHF higher band, rugged all weather model uses high class brass and aluminum alloy and does not require any field tuning or The CLV3-174 VHF base station collinear is designed and manufactured for long term survival and will deliver reliable performance for many years ZCG Collinear Omni-Directional VHF Antenna - 3dBd Request a Quote | Web Enquiry Form | sales@telcoantennas. 2m) VHF Marine Band 3dB Gain Collinear-Phased 5/8 Wave Elements This high performing, 4' VHF antenna is infused with the quality of our incomparable Phase III™ electronic elements. Build A 9dB, 70cm Collinear Antenna. 5 MHz at a center frequency of 450 MHz, which is three times more than Formulas used in J Pole calculator: Longest Section - 8424 / FreqMhz = inches. iv sr ws dd lu yv kh ws jd fl