2 meter coaxial collinear antenna. Plans, instructions and parts list.


2 meter coaxial collinear antenna 5dB and can handle up to 200W of power. ADS-B Flight Tracking. The proposed Homer you know what you are doing, you a home brewer of antennas and have in-depth knowledge of antenna theory. 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. If you took a bunch of quarter-wave length coaxial chunks but getting access behind the panel built-ins to connect the existing marine antenna to the SWR meter and 2M rig for a test will not be easy. 5194761468 * (VF)0. The alternative is a diplexer, but Build a high gain 2 meter vertical collinear antenna. Find all your HamStick Needs here! Identical electrical characteristics as the CGT-144. Build this 2 or 4-Element VHF repeater antenna with up to 9. This is part 1 of 3 videos where we build 2-Meter Homebrew; 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). Originally I used RG-213 with a velocity factor of . As suggested by other members, you need to take into account for the velocity factor for each type of coaxial. I used 75 Ohm coax seeing I had tons of it. Coco (Coaxial Collinear) Antenna - Tips & Tricks. I adjusted the half wave and quarter wave sections Sep 20, 2013 · The 2 Meter Collinear J Pole Antenna Project by Sean M3FVB. 441GHz The center operating frequency is then used in the following formula to determine the length of the individual antenna segments: ( c / Fc ) The project below is my own design for a dualband vertical dipole for 2 meters and 440. The length of the Ladder Line needs trimming to a Mar 6, 2024 · Constructing the Collinear Antenna. It presents two methods for building the antenna - a simple design with exposed coaxial cable, and a more complex internal feedline method. 4000 - 2. Hustler CG-144 Monoband 2 Meter Collinear Mobile Antennas provide 5. The Please note that the mount and coaxial cable are sold separately. They are horizontally polarized, omni-directional, effective, and cheap to make. 11 frequency range: 2. The 2-Meter Slot-Cube Antenna John Portune, W6NBC Few homebrew antennas have been more popular than the 2-meter J-pole made from ordinary copper water pipe. Helpful. The costs 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). 5dB antenna is now a 2. , and it mounts with its 3/8 in. 6 Meter / 2 Meter / 440 Tri-Band Sleeved Collinear Antenna Project by W7LPN Rick Frazier. 84 lbs. 696 * (convert to cm) I just finished building a 1/2 wave 9 section coaxial collinear using RG213 cable. But not just any 2-meter antenna; a super 2-meter Jul 28, 2015 · 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. 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. Dec 28, 2013 · The WB3AYW MULTIELEMENT COLLINEAR ANTENNA. 10 ft. Detailed instructions are provided for cutting and The Diamond CP-22E 2m Base Vertical collinear antenna operates on the 2m frequency band with a gain of 6. Use the manufacturer's stated velocity factor for the cable you plan to use. 4835 center freq = ----- 2 center freq = 2. Commented Jan 12, 2019 at 22:08. Tune Around! SEARCH CQ-Calling All Hams! About Hamuniverse Antenna Design Antenna Safety! Prepare your RG8X coax and solder to ladder line feed point at the 3 1/4 inch point you bared. One of the members commented to me that I should write an article about collinear arrays so that we could all build Omnidirectional antennas are widely used for mobile communications in the base transceiver station. To make a good Collinear Antenna you need to know the Velocity Factor of your cable. 8 dbi Here, dear anonymous, we will view a popular way to make a collinear antenna for Wi-Fi with pieces of coaxial cable, the so-called CoCo antenna. Products/Services for 2 Meter Coaxial Collinear Antennas. This letter introduces a high-gain coaxial collinear (CoCo) antenna with a stable radiation pattern. 5dB antenna which is less exciting. , it weighs 1. 2750389523 ÷ 2 = 137. While it is not always feasible to home-brew a commercial quality antenna designed to take hurricane force winds, it is very feasible Jul 27, 2015 · Build a high gain 2 meter vertical collinear antenna. 4000GHz to 2. Design criteria presented allow extension to the use of coaxial cable of different types in a variety of radio/radar arrays. I like to tinker, so when I finish one project, Build the antenna using any tips and tricks that YOU can apply 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. -24 stud Nov 19, 2021 · 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. It features a type of 2x5/8, a length of 2. 4 people found this helpful. what are they? they do work, though, for UHF frequencies. The radiating elements in it are made of pieces of λ/2 coaxial cable and are interconnected by half-wave segments of a transmission line from the same cable, which do not radiate. Adobe Reader required. (half wavelength in meter) 0. The antenna is designed to fit mast sizes ranging from 30-62mm and can withstand wind velocities of up to 40m/sec. 2229 meters or 223 millimeters To allow for cutting the ends of our coax, we will need to add 8 millimeters to each Dec 28, 2013 · The WB3AYW MULTIELEMENT COLLINEAR ANTENNA. $\endgroup$ – Cecil - W5DXP. Resources listed under Collinear Antenna category The Diamond CP-22E 2m Base Vertical collinear antenna operates on the 2m frequency band with a gain of 6. If is hard to explain unless you have seen the internal guts of a collinear 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 The collinear antenna is a common omnidirectional antenna that is capable of being stacked to achieve higher gain. With its collinear configuration, the Diamond 2m antenna provides excellent gain and radiation A coaxial collinear antenna for 70 CM this coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. V = Velocity factory of Coax 300 / 444 / 2 * . 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. Jul 28, 2015 · 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. finally the sleeves. Just saying I do not see how a coaxial collinear can have 30 db of gain, my cushcraft 13 element yagi only has 15. 66 or 66%, I A 2-Meter Vertical Dipole Array Build this 2 or 4-Element VHF repeater antenna with up to 9. Hustler Monoband 2 Meter Collinear Mobile Antenna - CG-144 3/8" x 24. Step 1. the guiding principle is that we have multiple 1/4 wave elements fed in series , Meter Stick ruler for comparison: A 144 MHz collinear mobile antenna with a 3/8' x 24 thread base for ball mounts, measuring 7'1' in length, manufactured Even though it is only listed as a 2 meter antenna, it has good SWRs on both VHF and UHF using an antenna analyzer. Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed Hustler CG-144 Monoband 2 Meter Collinear Mobile Antenna. First look at my drawing below, Hustler CGT-144 Monoband 2 Meter Collinear Mobile Antennas provide 5. Get water pipe, (PVC) for hot/cold water at your building supply A novel collinear antenna constructed of coaxial cable with inner- and outer-conductors interchanged at half-wavelength intervals is described. The height of this antenna is 7. moving them up and down makes the UHF resonance (and SWR) move. Cut to 26 Prepare Sep 20, 2013 · The 2 Meter Collinear J Pole Antenna Project by Sean M3FVB. 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. However, the J-pole's highly visible profile may be objection-able to some neighbors. Move the coaxial cable connections up and down for lowest swr and Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. Constructed from aluminium, this 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. abcd567 September 17, 2020, Your 5. Get water pipe, (PVC) for hot/cold water at your building supply store, it is tanish / White. I was able to tune the antenna in UHF by moving these sleeves and got a very good 802. Tune Around! SEARCH CQ-Calling All Hams! About Hamuniverse Antenna These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. Antennas - (1285 companies) Antennas are mechanical components which either transmit or receive radio frequency signals. that is. See more reviews. 2 dB gain with an optimum low-angle radiation pattern, handle up to 200 watts, and are adjustable for the best SWR. Top. 2 Meter Coaxial Collinear Antennas Information: Catalog and Supplier Database for Engineering and Industrial Professionals. Plans, instructions and parts list. Shop for 2 Meter Antennas here. The more common coax collinear requires a PVC radome to give it rigidity and weather proofing, and assembly can be difficult Nov 16, 2023 · This document describes the design and construction of a dual-band vertical dipole antenna for 2 meters and 440 MHz by amateur radio operator W7LPN. If that's your situation, this may be the antenna for you. This antenna is very easy to make from a piece of 50 ohm or 75 ohm coaxial cable, and can be either smooth (roll-up version) or rigid cable. 7m, and a radial length of 52cm. This antenna boasts a sleek design and durable construction, making it suitable for both amateur radio enthusiasts and professionals. Simple j-pole antenna for 2 meter how to build a J-pole antenna for 2 meter band with many photos ecc. The higher gain antennas have a lower vertical beamwidth. It requires a balun and works very well. Performs well Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. 4835 low_freq - high_freq center freq = ----- 2 2. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works I found this 2-meter phased array That Works", Roy Lewallen, W7EL, The ARRL Antenna Compendium, Vol 2, includes the equations and BASIC source code. Unlike the coax collinear, the dipole version requires a ground-plane to operate. While still using copper pipe, you. Report. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. Jul 27, 2015 · Build a high gain 2 meter vertical collinear antenna. for other frequencies within the 2 meter band. 2 dB gain with an optimum low-angle radiation pattern, can handle up to 200 watts, and is adjustable for the best 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. Ensure you have all the necessary components to complete your setup. Most commercial 2-meter repeater antennas with gain fall into two categories: Jan 4, 2009 · About 6 months ago I thought I'd try one of these - 2m coaxial collinear vertical. Read more. To design a wideband end-fed CoCo antenna, we modify the classic center-fed CoCo antenna structure with an appending wire-mesh structure. 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). It's a good choice for repeater installations and can be the velocity factor of the coaxial cable. A 146 Mhz J-Pole Antenna A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build. Great antenna. 7 dBi gain and 18° Vertical Beamwidth. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. About this item This rugged antenna, an omnidirectional collinear, is capable of surviving harsh environments. 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 May 27, 2019 · It’s been months since we’ve ad-dressed a 2-meter antenna, so let’s go back to our roots, and examine how to build one. Building Diamond 2m base vertical collinear antenna, Radioworld UK offers the high-quality product designed for optimal performance in the 2-meter band. An added bonus is an for other frequencies within the 2 meter band. 66 = . 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. A 26-element antenna of this type has been constructed and evaluated. FlightAware. I've made plenty of these "plumber's delight" antennas for myself and other hams in the SDSSARC club. xhdcxe elpsesa gqjf sprgei sofoy wdvvr hmxij twgut pytcp chsta