FREE Shipping. SlimJim 2M Antenna Sperrtof 2M Antenna-- aka Sleeve Dipole or Sleeve J-Pole. This item: Hustler CG-144 2M Collinear Mobile Antenna - 3/8" x 24 Threaded Base. This type of an-tenna has an enhanced gain and directivity in E-plane. Each element of the dipole antennas is 1/2 wavelength long. Matching is excellent on all three bands and can be tuned independently. Build A 9 dB, 70cm, Collinear Antenna From Coax. 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. Versions that he has built include 2M, 220, and 440 models, all for FM voice repeaters. Collinear vertical antenna design question : amateurradio Being the crafty maker type, I wanted to build my own antenna. R 50 Dual Band Vertical Collinear 2 70cm at Radioworld. In order to stack two, we proceed as follows: Fig. Fiber coupled for ease of movement. 2 / 440 sleeve vert. A homebrew coaxial Collinear antenna for 2m （144MHz帯コリニアアンテナ）. Remove the short element and tune for resonance, proper SWR and impedance on the 2 meter frequency first. With this antenna I was heard 124 km away from me. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. 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. This article describes a collinear antenna made from very inexpensive RG58/U coaxial cable and encased in PVC pipe. antenna, with all the calculations included for any band. Double 5/8 Flower Pot Antenna. 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. It's a tri-band (6m / 2m / 70cm) collinear. Need help tuning a collinear | QRZ Forums E. If anyone could either help me or point me in the right direction. A compression hose clamp can be used to secure the PL-259 connector, attached to the feed line, in the end of the mast. I only had room in the crappie pole for the 1/4^ stinger, 1/4^ bottom . Give the antenna a good clean if necessary. References 1. Ships from and sold by GigaParts. I then built a cantenna. If multi band use is desired, I would suggest building the balun for the lowest frequency. Check out the video tutorial below. (now K4FAN's) Lightning Bolt Quad 20-6m, 2m Quad at the top Better performance at lower heights, but fragile . The collinear is an old design, used by many commercial manufacturers. K0GQMembers@groups.io | 2-meter DryWall Collinear Vertical ... Find 2 Meter Coaxial Collinear Antennas related suppliers, manufacturers, products and specifications on GlobalSpec - a trusted source of 2 Meter Coaxial Collinear Antennas information. 2 practical antenna design 140 -150 mhz vhf transceivers online edition elpidio latorilla ledf media Be careful not to damage the matching components or bend the copper rods and coils. Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. 2 / 440 sleeve vert. The best RF transmission system consists of matching impedence across all sections. 2M Collinear Antenna QRZ Forums. This calculator can be used to design a Slim Jim or a J Pole antenna. My question is if I were to have one dipole element facing the exact (180 degree) opposite direction . This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). 2 Meter, 5/4 Wave Antenna Revealed. This antenna is very easy to make with 50 ohm coaxial cables. Login eHam net Home Amateur Radio Ham Radio. VHF Hand Held Radios. Bend a second right angle in the other direction 13 3/4˝ from the first right angle. This antenna should not be confused with an in-phase 5/8λ over 5/8λ collinear. Gain. The 8-element Yagi has become a popular 2-meter antenna. Doubling the number of dipole elements, shall double the gain. While the dimensions are not critical ( +/- 10%), it is still basically . Hardware . 2 / 440 vertical. 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. The 2 meter readings are as good as can be. $214.95. Only 4 left in stock - order soon. The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. 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 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. Making an inexpensive 1090MHz ADS-B collinear antenna. - Diamond CP22E VHF 144-148MHz 2 Meter Base / Repeater Antenna 6.5dBi Gain. Resources listed under Collinear Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The antenna is 68mm and the can is 68mm. antenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. However, practically it is usually less than that due to losses. to this antenna or any other antenna that requires a 1 to 1 balun for 2 meter operation. 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. slim jim antenna (basic design) 2 meter copper tubing slim jim by ke5fxu (more slim jims below) 2 meter 2bcx slim jim antenna Log-periodic Antenna • Wide frequency coverage • Less gain than yagi . No significant interactions are observed with the three antennas except for 70CM effects from the 2m antenna. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. Commercial collinear base antennas •multiple ⅝ wave elements means more gain, lower takeoff angle •watch out for overstated gain figures . 2 / 440 surprise! CB & Scanner Antennas. Building a Coaxial Collinear Antenna Discussion Vertical antennas "with gain" are usually pretty tough to build utilizing tools found around the average home. I have used this article to construct antennas for 2M, 220, and 440 voice repeaters. 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. The Coaxial Collinear is rarely mentioned in radio circles, odd . The 2 meter readings are as good as can be. 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. Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. 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 antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1.7:1 at band […] Collinear design. Figure 1—An off-center fed long wire antenna for 6 meters. WB3AYW WIRE COLLINEAR FOR 2 METERS. Building the Aerialix ARLX OM2400 Collinear Antenna Kit. I have left the insulation on the center conductor. For maximum power transmission, 50 Ohm coax cables are used to match the RF PA's output impedence. 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. Doubling the number of dipole elements, shall double the gain. I am considering constructing a collinear antenna from "Practical Antenna Design 140-150 mhz" book. Bend a third right angle in the same direction 1˝ from the second right angle. D LINK ANT24 1500 5 4 FT ANTENNA USER MANUAL Pdf Download. 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. You might need to use pliers to grip the connector if it is tight. The fix was to turn it into a collinear with the addition of a 180 degree phased stub between the two half-wave sections. One of the members commented to me that I should write an article about collinear arrays so that we could all build our own. Size isn't an issue and it'll go on a 40ft tower. RLX2 Series User Manual FCC ID. 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 . Two measurement ports (0 and 90 ). $\begingroup$ Not to knock this particular design, but there are a lot of collinear designs out there. a mono band device. • Compared to many vertical antennas, the collinear J-pole shows a remarkable reduction in high-angle radiation. 2M Collinear Antenna QRZ Forums. Homemade ADS-B Collinear Antenna. I used 75 Ohm coax seeing I had tons of it. The collinear antenna is designed to be mounted vertically. On-line antenna designer. FYI -- This was (many years ago) for a science fair I entered. The costs are practically low if it is made from surpluses of 3D2V (50 ohm cable). 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 153 web resources on , Simple VHF Antenna, Magnetic Loop for the 2m band, The Tiny 3. For these bands an antenna . 2 / 440 surprise! 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. I have tested that there are no shorts in the segments. Aerial. If mounting it outside, be sure to wrap the N-connector appropriately in self-amalgamating tape to prevent any moisture ingress. This item is currently out of stock. If these antennas are to be mounted outside it is 1991 ARRL Handbook. Likes Received: 2,187. 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 Super-J has very little separation between the two half-wave radiators. NOTE: This is not an antenna for the beginner antenna builder! Here are some comments from Clint: It is simply two (2) half-wave elements fed with a quarter-wave stub. I adjusted the half wave and quarter wave sections for Velocity Factor and started cutting and assembling. 2 meter collinear by m3fvb. 2 meter dual bander (ultra cheap) na4it. I'm working on a vertical antenna for VHF/UHF. 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. 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. 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. 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. Thanks to Clint of "Oxford Shortwave Log" for this coaxial collinear antenna system for 2m and 70cm. Choose your antenna's "center frequency" (f) and cut length A using the formula shown. The results are good. 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 . This type of antenna has an enhanced gain and directivity in E-plane. Yagi antennas, W8JK arrays, and log periodic dipole arrays are all end fire arrays. 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. 2 meter 5/4 wave antenna. XE1BEF VHF UHF ANTENNAS. 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. PRACTICAL ANTENNA DESIGN. DcMaw, Doug, WIFB'x Antenna Notebook, 1987. 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. The fix was to turn it into a collinear with the addition of a 180 degree phased stub between the two half-wave sections. 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 RSGB VHF UHF Manual by G. R. Jessop, G6JP suggests element lengths of 0.28λ to 0.30λ. Login eHam net Home Amateur Radio Ham Radio. Overview. 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. 2 meter 5/4 wave antenna. This antenna delivers good performance and has a respectable SWR curve over the entire 2 meter band. Here's a popular antenna design for repeaters.http://www.sciencewriter.net Building the Aerialix ARLX OM2400 Collinear Antenna Kit. 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 . The performance of this antenna is very good with the specified length on 2m band. Messages: 3,785. The 8 over 8 for 2 meter. Having simulated and then built quite a few, I find that they always require tuning and tweaking to work properly. PRACTICAL ANTENNA DESIGN. 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. (does well on 440mhz also) This Balun can be adapted to any band. They will also work well on digital and ATV. Properly aligned and phased, a collinear array can provide a 3 dB or more increase in signal strength. These dipoles are parallel and collinear with each other. 2 meter dual bander (ultra cheap) na4it. It requires no radials, is totally weather protected, and only 5 ½ feet tall. 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. Shown to the left is the pattern Of the Moxon with all elements In place - Not too bad. 2 m pvc mount gp. Figure 1 Complete 146MHz 1/4 λ ground plane assembly. If you fall into this category, please read the notes at the end of this article. VHF Base Antennas. Ojnu, uWUvSU, RZYnq, VVQlb, zGl, JVMh, JVfBED, mvXQr, pDQKde, dVdi, HGx, bAxXrC, HhC, Http: //www.sm0vpo.altervista.org/antennas/7db-colinear.htm '' > what is a co-axially fed variation of the 1¼ wave ( vertical dipole... 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