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NOTE: This is not an antenna for the beginner antenna builder! Attached Images Screen Shot 2013-12-30 at 3.39.55 PM.jpg (13.5 KB, 95 views) One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. I used 75 Ohm coax seeing I had tons of it. Building the Aerialix ARLX OM2400 Collinear Antenna Kit. Building the Aerialix ARLX OM2400 Collinear Antenna Kit. On-line antenna designer. FREE Shipping. This type of antenna has an enhanced gain and directivity in E-plane. Build A 9dB 70cm Collinear Antenna - Circuit Wiring . Depending on the materials in your "junk box", you could build this VHF/UHF antenna for almost no cost. D LINK ANT24 1500 5 4 FT ANTENNA USER MANUAL Pdf Download. WB3AYW WIRE COLLINEAR FOR 2 METERS. Likes Received: 2,187. slim jim antenna (basic design) 2 meter copper tubing slim jim by ke5fxu (more slim jims below) 2 meter 2bcx slim jim antenna It's a tri-band (6m / 2m / 70cm) collinear. VHF Base Antennas. Ships from and sold by GigaParts. N8WRL 80m . This antenna is very easy to make with 50 ohm coaxial cables. Gain. I then built a cantenna. This calculator can be used to design a Slim Jim or a J Pole antenna. 2 / 440 surprise! 2 meter dual bander (ultra cheap) na4it. The CP22E is a high-gain monoband antenna made from heavy-duty aluminum construction, at a price your pocket book will like! slim jim antenna (basic design) 2 meter copper tubing slim jim by ke5fxu (more slim jims below) 2 meter 2bcx slim jim antenna Figure 1 Complete 146MHz 1/4 λ ground plane assembly. 2 m pvc mount gp. Collinear antenna building, by Karl Shoemaker . The collinear is an old design, used by many commercial manufacturers. 70 cm has it's peaks and valleys but is at or below 2.0 over almost the entire band making this an effective antenna on both bands. A collinear antenna array is made up of dipole elements. Only 4 left in stock - order soon. Give the antenna a good clean if necessary. advantage of a collinear arrangement as 3 dB greater than a single section, we rarely obtain in real antennas more than about a 2.0-2.5 dB increase in gain. $214.95. Choose your antenna's "center frequency" (f) and cut length A using the formula shown. the "ll cool j" 2 meters for a song. 2M Collinear Antenna. DcMaw, Doug, WIFB'x Antenna Notebook, 1987. 2 meter 5/4 wave antenna. If anyone could either help me or point me in the right direction. Earlier in the week a video comparing a Discone to a Coax Collinear antenna for ADS-B reception was posted. Remove the short element and tune for resonance, proper SWR and impedance on the 2 meter frequency first. Yagi antennas, W8JK arrays, and log periodic dipole arrays are all end fire arrays. 2 / 440 vertical. The high performance of our well known G6-144 and G6-440 are combined in our new 2 meter/70cm dual band vertical, Model G6-270R . The collinear antenna is designed to be mounted vertically. 2 / 440 vertical. However, practically it is usually less than that due to losses. I am considering constructing a collinear antenna from "Practical Antenna Design 140-150 mhz" book. This antenna should not be confused with an in-phase 5/8λ over 5/8λ collinear. PRACTICAL ANTENNA DESIGN. For any vertical collinear array, the only place from which to Build A 9 dB, 70cm, Collinear Antenna From Coax. I've been looking at the Diamond X510 and their design. The higher gain antennas have a lower vertical beamwidth. The results are good. It's basically just two pieces of wire linked by a 4:1 balun. Commercial collinear base antennas •multiple ⅝ wave elements means more gain, lower takeoff angle •watch out for overstated gain figures . For maximum power transmission, 50 Ohm coax cables are used to match the RF PA's output impedence. collinear RTL SDR. References 1. antenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. In this . 2-meter Two-element Collinear Antenna The phasing stub After reasonably straightening the 6 AWG wire, bend the first right angle 47 1/2˝ from one end, which will serve as the top end. Shown to the left is the pattern Of the Moxon with all elements In place - Not too bad. 2 meter 5/4 wave antenna. Bend a second right angle in the other direction 13 3/4˝ from the first right angle. W7LPN says whenever he needed to tune one he built he just trimmed the . Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. 2 practical antenna design 140 -150 mhz vhf transceivers online edition elpidio latorilla ledf media Versions that he has built include 2M, 220, and 440 models, all for FM voice repeaters. Antenna projects for 144 MHz category is a curation of 153 web resources on , Simple VHF Antenna, Magnetic Loop for the 2m band, The Tiny 3. Thanks to Clint of "Oxford Shortwave Log" for this coaxial collinear antenna system for 2m and 70cm. VHF Hand Held Radios. Messages: 3,785. It is working quite well - although not quite as good as my first collinear. Collinear Coaxial Antenna Design Calculator. 2 Meter, 5/4 Wave Antenna Revealed. 1991 ARRL Handbook. I settled on a 2 meter vertical dipole. Hard to construct matching coils are normally needed as well as hardware and tubing which can be difficult to find. In a previous post we debunked the 2 meter 5/4 wave antenna as actually an end-fed full-wave antenna resulting in a poor radiation pattern hardly optimal for terrestrial use. The Super-J has very little separation between the two half-wave radiators. 70 cm has it's peaks and valleys but is at or below 2.0 over almost the entire band making this an effective antenna on both bands. 1. Bibliography. ANT150F2 Collinear Antenna. Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. You might need to use pliers to grip the connector if it is tight. It requires no radials, is totally weather protected, and only 5 ½ feet tall. Remove hex head screw and small grub screw. The fix was to turn it into a collinear with the addition of a 180 degree phased stub between the two half-wave sections. 2M/70CM elements in a vertical configuration, which is appropriate for repeater contacts. Matching is excellent on all three bands and can be tuned independently. I adjusted the half wave and quarter wave sections for Velocity Factor and started cutting and assembling. 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. The angle is low. Fiber coupled for ease of movement. For these bands an antenna . RG8x Coaxial Cable, CB Coax Cable, 50ft RFAdapter UHF PL259 Male to Male Low Loss CB Antenna Cables, 50 Ohm for HAM Radio, Antenna Analyzer, Dummy Load, SWR Meter. E. The collinear antenna was made from 6 segments of RG6, cut to 15cm lengths with ~2cm of wire exposed at each end of the segments. 2 / 440 sleeve vert. the "ll cool j" 2 meters for a song. Potential to use both ports at once. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. Login eHam net Home Amateur Radio Ham Radio. Introduction: 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. Here are some comments from Clint: The fix was to turn it into a collinear with the addition of a 180 degree phased stub between the two half-wave sections. The Antenna Farm : 2 Meter High Gain Antennas - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Amplifiers Connectors Aviation Radios Repeater Systems Towers & Accessories Scanners & Receivers Duplexers Diplexers . The antenna can be mounted by passing the feed line through a mast of 3/4-inch ID plastic or aluminum tub-ing. Check out the video tutorial below. I'm not sure exactly what design I used when I first built it, but they do seem to vary a little: N1HFX's Build a 9 dB, 70cm, Collinear antenna from coax includes a 1/4 wave element at each end. Add a loop of string to the top, and hang it on a tree branch, use it with your handheld transceiver, then roll it up . 2 Meter, 5/4 Wave Antenna Revealed. XE1BEF VHF UHF ANTENNAS. 2 m pvc mount gp. This antenna delivers good performance and has a respectable SWR curve over the entire 2 meter band. Doubling the number of dipole elements, shall double the gain. However, practically it is usually less than that due to losses. 2. If you have no particular preference within a given ham radio band, then simply enter its center. Size isn't an issue and it'll go on a 40ft tower. The actual gain of this antenna is +7.5dBd. Figure 1—An off-center fed long wire antenna for 6 meters. (now K4FAN's) Lightning Bolt Quad 20-6m, 2m Quad at the top Better performance at lower heights, but fragile . CB & Scanner Antennas. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. The double 5/8 is a co-axially fed variation of the 1¼ wave (vertical) dipole shown in the adjacent diagram. FYI -- This was (many years ago) for a science fair I entered. A 2-Meter Vertical Dipole Array Build this 2 or 4-Element VHF repeater antenna with up to 9.7 dBi gain and 18° Vertical Beamwidth. Enter the required frequency in MHz, the velocity factor of the coax . As many attest, there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Double 5/8 Flower Pot Antenna. P C A A D 7 Antenna Design Associates. I was shooting for 147.06 MHz, but the setting knob on most analyzers can be really touchy, so this was close . A compression hose clamp can be used to secure the PL-259 connector, attached to the feed line, in the end of the mast. 2.9 Suggestions or Questions If you have any suggestions or questions concerning this antenna, contact me either by packet at VE4WK@VE4KV.#WPG.MB.CAN.NOAM, or FAX: (204) 275-0261, or eMail: kinsner@ee.umanitoba.ca. The feedpoint shows about 200 ohms, so a simple 4:1 balun made with a short piece of RG-58 is needed to match it. If multi band use is desired, I would suggest building the balun for the lowest frequency. The best RF transmission system consists of matching impedence across all sections. wavelengths long should have a gain of almost 5 dB, and an antenna 10 wavelengths long should have a gain of approximately 7.5 dB. The 8-element Yagi has become a popular 2-meter antenna. Before analyzing stacking (broadside) or collinear antennas, we really should understand how antenna systems produce gain. Making an inexpensive 1090MHz ADS-B collinear antenna. This item: Hustler CG-144 2M Collinear Mobile Antenna - 3/8" x 24 Threaded Base. The 5/8 wave antenna consists of a vertical radiator, a loading coil and colinear plane at the base of the antenna. 2 / 440 sleeve vert. While it is not always feasible to home-brew a commercial quality antenna designed to take hurricane force winds, it is very feasible to built a collinear . I'm working on a vertical antenna for VHF/UHF. The costs are practically low if it is made from surpluses of 3D2V (50 ohm cable). Hi there, G1ZMA kindly decided to build me another antenna for 2m and 70cm and here it is. antenna, with all the calculations included for any band. Bend a third right angle in the same direction 1˝ from the second right angle. Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. Each element of the dipole antennas is 1/2 wavelength long. Properly aligned and phased, a collinear array can provide a 3 dB or more increase in signal strength. Find 2 Meter Coaxial Collinear Antennas related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of 2 Meter Coaxial Collinear Antennas information. •Heavy-duty aluminum antenna sections. PRACTICAL ANTENNA DESIGN. 2M Collinear Antenna QRZ Forums. This item is currently out of stock. I only had room in the crappie pole for the 1/4^ stinger, 1/4^ bottom . FINAL LEGAL STATEMENT I have released the antenna into the public domain. This is post 2638 in a continuing series of simple ham radio antennas. a mono band device. If you fall into this category, please read the notes at the end of this article. Take hold of the SO239 connector and carefully withdraw the radiating element from the tube. Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M J-Poles Antennas — Dimensions, matching, everything — from Bux CommCo — Be sure to read importance of a decoupling loop. The 2 meter readings are as good as can be. Calculate the required dimensions for a coaxial collinear antenna construction for any given frequency. Resources listed under Collinear Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Dusan Balara's Coaxial Collinear antenna for ADS-B receiver doesn't bother, but does have a 50/75 Ohm resistor on the end. The antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1.7:1 at band […] The author of that video has now posted on his blog a tutorial on how he made the coax collinear antenna. RLX2 Series User Manual FCC ID. The Coaxial Collinear is rarely mentioned in radio circles, odd . The 8 over 8 for 2 meter. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). Aerial. T he antenna also works reasonable on 10 and 15m. Building instructions for the NEW WB3AYW Collinear Antenna G-6270R HUSTLER G6270R. An Improved Version (See older version here) 3 element = 7 dBd Gain 5 element = 9.4 dBd Gain 10 element = 13 dBd gain These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. $67.00. COLLINEAR ANTENNA ARRAY A collinear antenna array is made up of dipole elements. This type of an-tenna has an enhanced gain and directivity in E-plane. Lost some blood scouring the inside to get a good electrical contact between the shielding of the (2m RG6U)) coax and the can. . While the dimensions are not critical ( +/- 10%), it is still basically . See all 3 brand new listings. They fire in the direction of the boom through the plane of the elements. 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. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. The antenna is 68mm and the can is 68mm. Discussion in ' Antennas, Feedlines, Towers & Rotors ' started by KJ4EKS, Jul 23, 2008 . Be careful not to damage the matching components or bend the copper rods and coils. And the SWR being low is no guarantee that the gain is good in the band of interest. Collinear vertical antenna design question. $\begingroup$ Not to knock this particular design, but there are a lot of collinear designs out there. The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. R 50 Dual Band Vertical Collinear 2 70cm at Radioworld. Doubling the number of dipole elements, shall double the gain. Now onto my ideas, facts, and past construction practices for the collinear. Kevin Custer W3KKC, your webmaster, has also built several versions of this antenna using this information and feels that out of all of the collinear construction articles he has seen that this is the best. I have that crimped to an F-Type connector, adapter to an F-type to BNC then into a BNC to SMA (Waiting for my F to SMA to come in from Amazon). (does well on 440mhz also) This Balun can be adapted to any band. If mounting it outside, be sure to wrap the N-connector appropriately in self-amalgamating tape to prevent any moisture ingress. Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. Click to enlarge. Tuning is accomplished by sliding the feed point i where the coax is clamped to the antenna) cither up or down to secure ihe best match. My question is if I were to have one dipole element facing the exact (180 degree) opposite direction . Collinear design. In order to stack two, we proceed as follows: Fig. The RSGB VHF UHF Manual by G. R. Jessop, G6JP suggests element lengths of 0.28λ to 0.30λ. The 2 meter readings are as good as can be. This article describes a collinear antenna made from very inexpensive RG58/U coaxial cable and encased in PVC pipe. They will also work well on digital and ATV. Amazing what you can achieve with a metre and a bit of old RG58 an. This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount I have not used for 6 years. Attached Images Screen Shot 2013-12-30 at 3.39.55 PM.jpg (13.5 KB, 95 views) Homemade ADS-B Collinear Antenna. See details. Log-periodic Antenna • Wide frequency coverage • Less gain than yagi . ANTENNA EXPERTS. 5/8 vertical antenna design. - Diamond CP22E VHF 144-148MHz 2 Meter Base / Repeater Antenna 6.5dBi Gain. Being the crafty maker type, I wanted to build my own antenna. DBJ-220 - Base station antenna (220-225MHz) Maximum input power 75 watts $35 DBJ - UHF (perfect for GMRS) +5dB Gain Antenna - US patent 8,947,313 +5dB gain no radial collinear - featured in CQ magazine (Summer 2012) $50 Accessories - please email or call so we know exactly the adapter you need. Getting Started: First look at my drawing below, and decide how long an antenna you want to have up, approximately. 1988 ARRL Antenna Book. This OM used a half-wave vertical at 20 m high. I need to tune it because the swr is too high on 2m as well as 6 and 70 but those don't seem to be quite as high in most of their respective band frequencies. Having simulated and then built quite a few, I find that they always require tuning and tweaking to work properly. As the name suggests the 1/4 wave ground plane has elements that are a 1/4 of a wave length of the operating frequency in length, this however is the electrical length not the physical length. A collinear antenna, also called "co-linear" or "collinear antenna array", is a set of dipole antennas aligned along their length so they form one long line. 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. By ON4CFC Via Antennex 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 . 2 meter collinear by m3fvb. A homebrew coaxial Collinear antenna for 2m （144MHz帯コリニアアンテナ）. 2 / 440 surprise! Using an antenna analyzer, I was able to tune my antenna to 1.1:1 SWR and an impedance of 45 ohms at a frequency of 147.02 MHz. 2 meter collinear by m3fvb. Login eHam net Home Amateur Radio Ham Radio. Collinear antennas category is a curation of 22 web resources on , Home-brew Compact 6dBi Collinear Antenna, Collinear antenna building, Build A 9dB, 70cm Collinear Antenna. Antenna projects for 144 MHz category is a curation of 153 web resources on , Simple VHF Antenna, Magnetic Loop for the 2m band, The Tiny 3. The average height of the collinear is about 2 meters higher, compared with a single 1/2 wave, so this will also play a part. 2M Collinear Antenna QRZ Forums. 3 shows that an 8 element Yagi has a beam width of approximately 37 degrees in the plane of polarization (i.e., horizontal plane for a horizontal Yagi). Building a Coaxial Collinear Antenna Discussion Vertical antennas "with gain" are usually pretty tough to build utilizing tools found around the average home. 2 meter dual bander (ultra cheap) na4it. Recently the RASON technical committee was hard at work at the repeater site repairing our 2 meter repeater antenna. About 6 months ago I thought I'd try one of these - 2m coaxial collinear vertical. In a previous post we debunked the 2 meter 5/4 wave antenna as actually an end-fed full-wave antenna resulting in a poor radiation pattern hardly optimal for terrestrial use. Dipoles Media Online. Two measurement ports (0 and 90 ). The conduit radome provides a robust and sturdy enclosure for the antenna, and if required, it can be mounted outside in the weather. Hardware . A sleek, one piece tapered fiberglass radome eliminates the inter modulation and mechanical . 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. I have left the insulation on the center conductor. No significant interactions are observed with the three antennas except for 70CM effects from the 2m antenna. He says it's primarily a 2m antenna but operates well on 6 and 70 too. I have tested that there are no shorts in the segments. It consists of five half-wave dipoles, four of which are end-fed by means of a 1/4-wave stub to invert the phase. With this antenna I was heard 124 km away from me. to this antenna or any other antenna that requires a 1 to 1 balun for 2 meter operation. SlimJim 2M Antenna Sperrtof 2M Antenna-- aka Sleeve Dipole or Sleeve J-Pole. If these antennas are to be mounted outside it is These di-poles are parallel and collinear with each other. I decided it was time to set up a 2 Meter base station. The performance of this antenna is very good with the specified length on 2m band. These dipoles are parallel and collinear with each other. 2m/70cm 6dB COLLINEAR VERTICAL. It is simply two (2) half-wave elements fed with a quarter-wave stub. Dimensions for the 144, 222 and 440-MHz bands are given in Fig25. • Compared to many vertical antennas, the collinear J-pole shows a remarkable reduction in high-angle radiation. I have used this article to construct antennas for 2M, 220, and 440 voice repeaters. Not open for further replies. Overview. Here's a popular antenna design for repeaters.http://www.sciencewriter.net
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