Copper Dual Band Super J Pole Antenna

This calculator can be used to design a Slim Jim or a J Pole antenna. ) This is an excellent performing J-Pole type antenna, constructed from readily available materials. Antenna for the 220 MHz Band (1. This J-Pole is made from 1/2 inch solid copper pipe and can be broken down into 2 pieces, each about 34 inches, which makes it convenient to use for Emcom, Public Service and Field Day events, etc. I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). 40 Meter J Pole Antenna. The Super-J variation of the J-pole antenna adds another collinear half-wave radiator above the conventional J and connects the two with a phase stub to ensure both vertical half-wave sections radiate in current phase. END CAPS FOR WEATHER RESISTANCE. It works very well as a multiband antenna indoors. Slim Jim and J Pole calculator (American Version) – M0UKD – Amateur Radio Blog. I'm now testing it and it works fantastic increased my vehicle range by ~30 miles from a dual band mag mount! The SIMPLE 2m Copper 'J' Antenna "J Pole " is incorrect. Indeed, the Super-J will never approach the gain advantage of a properly separated two element collinear antenna, but we can get closer to this goal. A half wave radiator fed at one end presents a very high feedpoint impedance, at least several thousand ohms. The Diamond did outperform the super J-pole in my tests. This is my revised "BASE" 2m/70cm Copper-Pipe "J", a "how-to DIY" with an optional method to make a "PORTABLE" dual-band "J" for hotel travelers, restricted apartment dwellers, or for limited balcony/patio use. Slim Jim vs J-Pole Antennas. Simple J-Type 10m Vertical by W6IOJ, Sept. The Dual-Band Open-Stub J-Pole Antenna Built out of heavy duty 3/16" angle aluminum, UHF SO-239 connector with 3/8 aluminum elements and all stainless steel hardware. pdf Simple 2m Copper Pipe J. The basic configuration of the ribbon. (can not obtain good VSWR on 440 but the 2m gain is outstanding - about 6dbd worth!) EXPERIMENT, create you own unique designs the "J" is a very forgiving, yet, robust and fundamentally versatile antenna that can let YOU put the technical design,. At UHF most of these imitations have horizontal loss of -6dB. The antenna is en-closed in UV-resistant PVC pipe and can thus withstand the elements with only the antenna connector exposed. Listed under the category that is about Antennas for 2 meters band. Works well with handheld HT radios, base stations, scanners, and repeaters. [22] [23] [24]. pdf J-Pole with VSWR Adjustment. In fact, the built version of the antenna is available, for cheap. Beam \ Tri-bander. a 2 meter antenna made of copper tubes offering circular polarization. Each set provides over 500 ohms of common mode resistance to keep antenna current off the coax and on the antenna for better radiation pattern and less coax radiation which can cause RFI to nearby electronics. Ham Radio Antenna Home Brewing Copper Base Radios Diy Projects Tech Ideas Ants. In my design I use 1/2" copper schedule M tubing and 1/4" soft copper tubing. This essentially creates an end fed dipole yet still retains the j match system. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. 220 Super J-Pole Antenna by KA0NAN, May 1996. 95: Sirio HP 2000C VHF 2m Radialess Mobile Antenna $49. A J-Pole is a 1/2 wave vertical with a 1/4 wave matching stub. I am no expert in antenna design but enjoy playing with different ideas. Copper Cactus Antenna-- Tri-bander plans The Copper pipe Tri-Band "J" Antenna for 146, 223, 446 Mhz. 10 m | 12 m 2m-70cm antennas super jpole, VE3ELB: A 6m J-Pole Antenna using Ribbon Cable, G4AON: A J-pole half-wave vertical for Four: Antena OSJ dual band VHF / UHF com um cabo: Antenna VHF tipo JPOLE: Antena J-Pole para 146 MHz, 220 MHz, 440 MHz: Antenne en J alimentee par. Adjusted Price: $49. Also includes a 6 ft. Dual-band Loop Antenna for 30m - 40m 37 61. Your going to like this super J-pole project Radio-Electronics. Shop cliffscustomcutouts. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. J-pole antenna Last updated September 23, 2019 J-Pole Antenna. Select at least ONE checkbox to filter your search! Antenna Discone. Linear Loaded Sloper Antenna for 160m 43 68. 344 Likes, 8 Comments - Ouachita Baptist University (@ouachita) on Instagram: “From the “Ouachitonian”: “If you’re just nice to the kids, they’ll believe you’re a princess if you…”. built per directions it covers entire 2m band ! this antenna is built almost entirely of hardware store items with the exception of the feedpoint connector and works as well or better than most commercial antennas - and it cost less too !. Amateur Radio at Spirit of Speyside Whisky Festival Moray Firth Amateur Radio Society is celebrating the Spirit of Speyside Whiskey Festiva. This value is about 2. OSJ - Model OSJ 146/440 Dual Band J-Pole. Works well with handheld HT radios, base stations, and repeaters. Construction Plans for the Model J146/440. Cebik W4RNL 2 Meter Halo Antenna By N2KBK Copper Cactus J-Pole antenna-- Plans for 52, 146, 223. Share your thoughts. a 2 meter antenna made of copper tubes offering circular polarization. It works for 2m and 70cm. From the book, the slim JIM was developed based on the basic J-Pole design, see Fig. The proposed antenna provides a bandwidth of 403MHz (2. Ruggedly constructed one piece design, this J-Pole antenna will last practically forever. J-pole antenna Last updated September 23, 2019 J-Pole Antenna. 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING. Dual band 144/440 MHz HT antenna combines telescopic and foldover features in a single antenna. 1 The antenna tuned easily, and oper- ated well for a few years until nature did it in. Plans, pictures and parts list. I saw the plans for this on the internet ( link to plans) by Allen Lowe (N0IMW). 344 Likes, 8 Comments - Ouachita Baptist University (@ouachita) on Instagram: “From the “Ouachitonian”: “If you’re just nice to the kids, they’ll believe you’re a princess if you…”. 00 Yaesu Original FTM-400DR/XDR 144/430MHz Dual-Band Analog/Digital Mobile Transceiver System Fusion. This antenna can be supported by many things including trees, ceilings, curtain rods and pretty much anything else you can dream up that will support 6 oz of weight and keep the antenna a couple. Fiberglass, 3 sections 146MHz 8. The design is based on an article which originally appeared in CQ magazine (1987), and a version of this design is produced by Arrow. Tram 1411 Scanner 25Mhz-1,300Mhz Vhf/Uhf Super Discone Base Antenna Plus Cb Tran. A full-res copy is in the Photo Gallery under Antenna Mounts. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. full article pdf (792 kb) abstract:. Copper Cactus J pole antenna - 2 metter 70 Cm dualband By the way, I left 1 1/4" between the tuning section between the 57 1/2" and 38" lengths of copper. On my site you can find both the all copper 2 meter J-Pole antenna and an all copper 2 meter Slim Jim antenna. Amateur Radio 2 Meter Slim Jim J-Pole Antenna. Plans for Dual Band J-Pole 1. Yaesu FT-60R dual band ht. 4 dB higher than the average gain of a single-radiator J-pole. If you find any other interesting links or information, let me know and I will include it here. A half wave radiator fed at one end presents a very high feedpoint impedance, at least several thousand ohms. Vertical \ Monoband. It is also great for your base unit as the connectors are water tight. KF4EOK'S 2 meter super j-pole antenna build SUPER J-POLE FOR 435MHz by VK6YSF The World Wide Web Prepared By Paul Howarth VK2GX. Your going to like this super J-pole project, This home made j-pole is easy to build and sturdy, While looking for an jpole antenna project to build I remembered seeing a Marine antenna called the Super J-Pole in the 1988 ARRL Antenna Handbook, which claimed a 6 db gain over a quarter wave ground plane. It is an ideal end-mounted, single-mast antenna. A Copper Pipe Jpole for Two Meters. Mounting Pole Universal Wall Mounts Brackets HDTV Antenna Mount for Outdoor TV Antenna J-Pole Mount 17inches Arrow Dual Band J-Pole 146/440MHz OSJ 146/440. Great for monitoring ground based FBO, tower, and airborne communications. This collapsible J-Pole is made from 1/2 copper pipe and can be broken down into 2 pieces for easy storage. I plan on making a new j-pole with a different balun type. Find many great new & used options and get the best deals for 2 Meter Dual Band Collapsible Copper J Pole Antenna- Included at the best online prices at eBay! Free shipping for many products!. J-Poles have a "DC ground" point. #N#J-Pole_Antenna-Designer. I also have a diamond 8ft dual band antenna. The Diamond did outperform the super J-pole in my tests. I was able to get it to work but it did take some time. Arrow Antenna A 146/440 J-pole. Comet GP-9 Dual-Band VHF/UHF Base Vertical Antennas provide very high gain on the 2-meter and Diamond Antenna X510HD Series Base Station Antennas. 8 pF and it would be perfectly matched to 50Ω. 2-1 at 146 MHz and <1. This mate-rial came from an article by Michael Hood,. ARRL's PDF on twin-lead J-Pole antenna. An Introduction to the Icom IC-2730E UHF/VHF Dual Band Transceiver. During past month. Works well with handheld HT radios, base stations, scanners, and repeaters. May 2, 2010 @ 9:47 pm […] while back I built a 2m Copper "Super-J-Pole" antenna which I attached to my chimney and use on a daily basis. 440 MHZ Antennas. Trailed behind the airship, it consisted of a single element, one half wavelength long radiator with a quarter wave parallel feedline tuning stub. Dipole Antenna Length Calculator Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. BACKGROUND OF THE INVENTION. This collapsible J-Pole is made from 1/2 copper pipe and can be broken down into 2 pieces for easy storage. 5:1 or better over the entire band. √ The EZ HD TV antenna is quality built and made in the USA. Not all of us have unlimited real estate and 120 foot towers at our disposal. Diamond Antenna Dual-Band Mobile Antennas are a great combination of price, quality, and versatility! You can find the exact combination of features you want to suit any dual-band mobile antenna need. I first introduced the concept of this antenna in Feb. 2m 70cm Dual Band Open Stub Solid J-Pole : I make these antennas out of solid, aircraft-grade aluminum, no weak tubing! These antennas are welded, so they are strong, have low resistance between parts, are more efficient and zero maintenance! Put one up and use it for many years. J-pole and Super J-pole Antenna The J-pole antenna (Fig. Super-J antenna. I saw the plans for this on the internet ( link to plans) by Allen Lowe (N0IMW). The basic configuration of the ribbon. a 2 meter antenna made of copper tubes offering circular polarization. Turning radius: 12 feet, 23 lbs. The traps isolate the bottom of the antenna at high frequencies to allow dual band use. After showing him this blog, he decided to make his own dual-band copper J-Pole, which he mounted to the roof of his QTH. 49” 36” Prototype was made of 1/2 inch copper pipe. You will need an SO-239, Chassis mount connector, 1/16 Copper coated steel welding rod and #6 fasteners. 8 KB: Dual-Band Twin Lead Antenna: 643. This antenna provides continuous coverage of the 2 metre (144 - 148MHz) and 70cm (430 - 450MHz) bands and is an excellent choice for base station use. The resonance frequency and the bandwidth of an AMC reflectors are determined by the unit-cell geometry, the dielectric permittivity, and the substrate thickness. This essentially creates an end fed dipole yet still retains the j match system. , 2-section antenna features a heavy-duty fiberglass base station, an insulated conductor, a 144-148 MHz /440-450 MHz frequency. gif J-Pole for 146 MHz (BuxComm). AVAILABLE FROM AUSTRALIAN SELLER. I have a dual band 2M/440 Slim Jim from Slim Jim Info, and it's made of ladder line. 25 meters) Base Ham Amateur Radio Antenna Copper J-Pole FREE SHIPPING. I had made J-Pole antennas before using ladder line, heavy copper wire and scrap copper pipe and even speaker wire but all were rough and ready types not very much in the way of care was taken in the construction. 100Ft Cooper Antenna Wire 15-635 $ 22. I was looking for something that was vertical, omnidirectional and with good gain that I could make quickly and easily. The Super Nova is available in a large range of colours to suit your vehicle, to select. Your going to like this super J-pole project Radio-Electronics. Share your thoughts. Hey guys, Here's my 3rd blog entry, talking about building a dual-band j-pole out of copper tubing. 10 m | 12 m 2m-70cm antennas super jpole, VE3ELB: A 6m J-Pole Antenna using Ribbon Cable, G4AON: A J-pole half-wave vertical for Four: Antena OSJ dual band VHF / UHF com um cabo: Antenna VHF tipo JPOLE: Antena J-Pole para 146 MHz, 220 MHz, 440 MHz: Antenne en J alimentee par. The antenna is en-closed in UV-resistant PVC pipe and can thus withstand the elements with only the antenna connector exposed. Section A, the antenna radiator is 3/4-wavelength long, so its dimension is found from:. DUAL BAND 2 meter/70cm Collapsible Copper J Pole Antenna- Free shipping included - $42. If you haven’t soldered copper pipe fittings before, buy a few extra and practice a few times before you start construction on your antenna. 40 Meter J Pole Antenna. This is a huge score for the money and boosts your signal a great deal. For Hams: Home/Base Option HB2: Tram 1180 Amateur Dual-Band 144-148/430-450 MHz From $80. The J-Pole has some gain over a quarter wave vertical and is omni directional. Wire Antennas for Ham Radio Dual-band Loop Antenna for 30m - 40m Super-Sloper Antenna. You can make the ladder line J-pole weather proof by inserting it into a PVC pipe and placing an end. Qty: * Super Dual Band J-Pole Antenna Reviews (0) Write a Review. Antenna with SMA Male Connector. by Yvan Dupo » Wed, 09 Feb 1994 15:52:05. 00 Yaesu Original FTM-400DR/XDR 144/430MHz Dual-Band Analog/Digital Mobile Transceiver System Fusion. The collinear J antenna improves the Super-J by separating the two radiating half-wave sections to optimize gain using a phasing coil. This is important because if the mast extends above the antenna ground plane it will affect the performance of the antenna. If anyone tries to sell you an un-modified j-pole and says it is a dual band antenna they are wrong they dont work, I have seen swr of 3:1 on unmodified j-poles on the. Now con-nection to normal coax is easily made below the antenna. 4 KB: Dual Band J-Pole: 19. The VB-25FM will be used to establish a connection to a specific ham that lives across town from me to play around with digital modes on a different radio. A antena J Pole, tambm chamada de antena Zepp (abreviao de Zeppelin), foi inventada pelos alemes para uso em seus bales dirigveis. The design is based on an article which originally appeared in CQ magazine (1987), and a version of this design is produced by Arrow. "Buck" Rogers Sr Practical Antenna Handbook by Joseph J. VHF / UHF 5/8 WAVE DUAL BAND NMO 3/6dB ANTENNA AMATEUR BANDS VHF 144-148MHz 2. I have enough material to make one more UHF antenna. SWR should be < 1. Posted date: December 18, 2014 in: Antenna No Comments. item 4 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING - 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING. S11 of our 'photo-model', designed for 2. tional single band ribbon J-Pole design to dual-band operation. Here a collection of links to make you own dual band VHF UHF copper cactus antenna. Super-M 400 Base Base Antenna 400-500 MHz: Super-M Classic Base Base Antenna 25-1300 MHz: Super-M Ultra Base Base Antenna 25-6000 MHz: Surmen: SX- 3 Vertical 2M/440 : SX- 5 Vertical 2M/440 : SX-20 Vertical 2M/440 : Coax-Seal: Coax-Seal : Please also see: Amateur Wire Antennas: Amateur Mobile Antennas: HT/Portable Antennas: Antenna Construction Supplies: Discontinued Base Antennas. Share your thoughts. The J-Pole is my all-around antenna, what I use for general 2 meter stuff like connecting to my local repeaters using my main 2-meter radio. Id rather thread thinner solid aluminum than to solder copper. Copper Cactus Dual-Band Super J-Pole Antenna Project from N7QVC. The authentic original KB9VBR ALL COPPER 144-148MHz 2 Meter VHF/UHF dual band ham amateur radio J-Pole antenna. Not practical for implementation although triband operation is achieved. Radio Shack # 21-961 3/8"-24/SO239 Mount (Mobile CB Antenna) Radio Shack # 15-826 TV Mast U-Bolt Clamp Assembly About 85 inches of 3/8" diameter Solid Aluminum Rod. 20 METER PORTABLE GROUND PLANE (From Across the Pond) A J POLE FOR ANY BAND Design a J Pole. I wanted something a little more substantial, though, for when operating at my primary/secondary QTHs. This makes a ‘loop’ of wire that is a short circuit to DC. Maximum power input 75 watts. Also includes a 6 ft. I saw the plans for this on the internet ( link to plans) by Allen Lowe (N0IMW). V-U Antenna J-pole bibanda - Benvenuti su OfficinaHF! Open Stub J-Pole Project - Completed (Many times) Homebrewing band Ive constructed a 14 - homebrewing I've constructed a 144/440 Dual band Open Stub J-Pole Antenna. Slim Jim vs J-Pole Antennas. I easiest dual band (144/440 MHz) antenna to build from materials available at ANY hardware or building supply store is the J-Pole antenna. In fact, the built version of the antenna is available, for cheap. W6RYX Antenna – Part 3 (W6RYX) May 2010. Free shipping. Keith O'Brien" wrote: > Has anyone constructed a Dual Band (144/440) J Pole antenna, that they could > supply the materials and dimensions used. Downloads • Links. The feedpoint required no adjustment. , 2-section antenna features a heavy-duty fiberglass base station, an insulated conductor, a 144-148 MHz /440-450 MHz frequency. Hood, KD8JB 2323 Jefferson Drive SE Grand Rapids, Ml 49507-3148 number of years ago, I built a J-Pole antenna from some scrap aluminum tubing and a 5-foot stick of TV mast. Plans for Dual Band J-Pole 1. The J-Pole is my all-around antenna, what I use for general 2 meter stuff like connecting to my local repeaters using my main 2-meter radio. Vertical \ Multi Band. 5 Dual-band operation near 3rd harmonic Characteristics [ edit ] The J-pole antenna is an end-fed omnidirectional half-wave antenna that is matched to the feedline by a quarter wave parallel transmission line stub of Lecher system form. Homebrew dual band super J-pole for 2m / 70cm. 2 meter/70cm Dual Band Collapsible Copper J Pole Antenna by KCØSDV Free shipping $30. The antenna on the right is the 154 MHZ J Pole I built. Attempting to build Arduino Based Antenna Rotator. Figure 5 presents the peak gain of the proposed dual-band antenna. Copper Cactus Dual Band J-Pole Antenna Plans Copper Cactus Dual Band J-Pole Antenna Plans. the copper tubing. Super-Sloper Antenna 44 69. The basic configuration of the ribbon. This calculator can be used to design a Slim Jim or a J Pole antenna. Extends to improve range plus it. A triple-band antenna for ambient RF energy harvesting system operating Y X Z 0 45 90 (mm) F : Geometry of the proposed dual-band antenna. This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. 144/220/440MHz Tri-Band Handheld With D-Star & APRS. I plan on using a better GMRS only omni antenna at home (currently using a. I easiest dual band (144/440 MHz) antenna to build from materials available at ANY hardware or building supply store is the J-Pole antenna. · M3FVB 2m 8db collinear for portable use. 1 The antenna tuned easily, and oper- ated well for a few years until nature did it in. I also got ideas to improve the J-pole by fabricating a mount that I I will be able to rivet and solder on the SO-239 connector and also solder it to the pipe with ease. jpg Easy VHF-UHF Antenna. You may use a Fiberglas rod (arrow shaft) as an insulator, but you will have to be very careful with the torch or you may weaken or burn the rod, or make it brittle. Vertical \ Other. 69 Add to cart; Sale! 2-Way Coax Antenna Switch CX-201U $ 34. When you figure it out, let me know. 99 — WA3WMG’s whip can be used to make a dual-band groundplane antenna. 2 Meter Slim Jim Copper Tubing Antenna by KE5FXU. Lihat lainnya. 3 dB -45 dB -38. Ham Radio Antenna Home Brewing Copper Base Radios Diy Projects Tech Ideas Ants. Judd continues to describe how the antenna works… " How the 2BCX 'Slim Jim' operates. The Romex Dual Band J-Pole antenna project is completed. of the Copper Cactus. The center insulator (see Figure 3) is made from 1/ 2-inch. I have had this antenna on my roof since 1992 and it has been problem-free in the San Francisco fog. This antenna provides continuous coverage of the 2 metre (144 - 148MHz) and 70cm (430 - 450MHz) bands and is an excellent choice for base station use. Specifically the low takeoff angle of the Slim-Jim mixed with some of the durability characteristics of the larger cactus copper J-Pole. 69 Add to cart; Sale! 2-Way Coax Antenna Switch CX-201U $ 34. This resource is listed under Antennas/2M. Now con-nection to normal coax is easily made below the antenna. What can I do? A: Try adding a balun to the coax. Authentic VHF/UHF Slim Jim J-Pole Dual Band Antenna jpole Would like to have 2 of these I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. This calculator is designed to give the horizontal length of a particular dipole (including Tees) antenna, or one side of it, for the frequency chosen. Narrow Copper J-Pole Antenna Written by David Keath - N0WKZ The goals I had in mind for this antenna were relatively simple. O'Neil, N3GO. View our EZ HD antenna kits and special offers here > — — √ Dual band design receives all digital channels VHF and UHF signals. Conejo Valley Amateur Radio Club, article edited by Rory Eikland, KG6HCU and Ken Larson, KJ6RZ, they have had excellent experience building and using J-Pole antennas, and share their experience on planning VHF and UHF Jpole antennas. Manufactures fixed and mobile 10m and 11m antennas and accessories. Copper Pipe J-Pole Antennas A copper pipe J-Pole antenna is a single band antenna that is much like a would be had to work with, I built some J-Pole antennas using TV twin lead. J-pole and Super J-pole Antenna The J-pole antenna (Fig. This page is broken. A high antenna gain is also required to harvest as much wireless power as possible, especially in the case when the source location is known. 99 Add to cart; 5W Dummy Load w/ Lamp DL-52 $ 6. VHF / UHF 5/8 WAVE DUAL BAND NMO 3/6dB ANTENNA AMATEUR BANDS VHF 144-148MHz 2. Dipole Antenna Length Calculator Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. J-pole antenna explained. I had to introduce a small copper wire into the braid for it to take the solder. Copper Cactus J pole antenna - 2 metter 70 Cm dualband homebrew J-Pole 2mt 70 CM antenna Project. 4 dB higher than the average gain of a single-radiator J-pole. DIY VHF/UHF antennas; 2m vertical; Quick and simple 2m grounplane; DIY 2m dipole antenna; Dual-band J-pole; 70cm-10m beams; simple 2m ladder line. the copper tubing. Find more of what you love on eBay stores! 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING. This invention relates to a multi-band antenna and more particularly to a switched, dual band, retractable antenna for a cellular communication device with the antenna automatically operating at two different frequency bands when the antenna is in its retracted position and when it is in its extended position. I had made J-Pole antennas before using ladder line, heavy copper wire and scrap copper pipe and even speaker wire but all were rough and ready types not very much in the way of care was taken in the construction. Second J-poles will resonate on 440 without traps but realistically for lack of a better term they suck. This antenna can greatly increase the effective wireless operation range of 802. ) Solid Aluminum - End Fed (SO239 Connector Only). 587GHz) in the lower frequency band and 4004MHz (3. Build a portable or permanent dual band J pole type antenna. Note green camouflage paint on tower and j-pole support. In an effort to make room for D-Star repeater pairs, the Society has proposed a revised band plan that will take spectrum from two meter simplex users statewide. Attach both RG174 cables for single fee. The folded dipole antenna consists of a basic dipole, but with an added conductor connecting the two ends together. 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. Dual-band 2m/70cm. S11 of our 'photo-model', designed for 2. Lihat lainnya. Home / Uncategorized / Elk Antennas 2M/440L5 Dual-Band Antenna. J-pole and Super J-pole Antenna The J-pole antenna (Fig. Run a #12 wire from the center pin of the connector and solder it to the long section ofthe antenna. Tactical and Survival Gear a 2 meter antenna made of copper tubes offering circular polarization. I wanted to build a antenna for my future base rig and was caught between the copper pipe J-Pole everyone knows about or the dual band solid aluminnum J-Pole. ) DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. In my design I use 1/2" copper schedule M tubing and 1/4" soft copper tubing. Not designed as a portable antenna in this form. 540 inch OD). Real-time band conditions; Latest posts Stealth 2 Meter Copper J-Pole for your HOA - AF5DN. I regularly talk to 4 base stations simplex that are 15 and 20 miles away. tional single band ribbon J-Pole design to dual-band operation. Works well with handheld HT radios, base stations, and repeaters. Manufactures delta loops, dipoles, qrp antennas, half squares,wire antennas, and other ham radio antennas. This antenna is extremely popular with Fire, Rescue, ARES, RACES and Military Contractors. After showing him this blog, he decided to make his own dual-band copper J-Pole, which he mounted to the roof of his QTH. Some web sites suggest the Super-J has a full 3 dB gain over the plain J-Pole which is a pretentious claim obvious to anyone with a copy of the ARRL Antenna Book and other references[1]. Comet GP-9 Dual-Band VHF/UHF Base Vertical Antennas provide very high gain on the 2-meter and Diamond Antenna X510HD Series Base Station Antennas. (MHz) 144-148 & 440-450 MHz Gain (dB). Copper Cactus Dual-Band Super J-Pole Antenna Project. 2 KB: Diversity Antenna: 1. I hope I'm not boring you guys, just thought I'd post info that I learned from this hobby of mine!. 5:1 on VHF and a little more on UHF, IIRC. J-pole antennen hang efter luftskibet og J-pole-antennen udgøres af et enkelt element; 1/2-bølgelængde lang stråler koblet til det ene ben på en 1/4-bølgelængde balanceret stub. A balun is necessary because a J-pole antenna uses a balanced feed (the. I have personally built both types of antennas, definitely worth your time and energy!! Marc "G. DBJ-1 (commercial) dual band base antenna - (152-157 MHz and 460-470 MHz). Judd continues to describe how the antenna works… " How the 2BCX 'Slim Jim' operates. The Super J-Pole Antenna(Collinear Design) Below is a Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole. Looking to upgrade your home entertainment system? Solid Signal has everything you need to get the job done! We stock DIRECTV and Dish Network dishes and receivers, HDMI cables, wireless cellphone signal boosters, home security systems, satellite installation tools including multiswitches and cables and other satellite tv products!. Specs: 58 inches tall, end-fed folded dipole design. It works great! A good detailed, step by step construction guide would be great, with pictures and video. Loading Unsubscribe from Cevan Twilley? Cancel Unsubscribe. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. Half-Sloper Antenna for 160m 41 66. As described later, the Q-section is made by replacing 135/ 8 inches of the coaxial-cable feed line shield braid with 13 5/ 8 inches of 3/ 8-inch copper tubing. I had made J-Pole antennas before using ladder line, heavy copper wire and scrap copper pipe and even speaker wire but all were rough and ready types not very much in the way of care was taken in the construction. The basic format for the folded dipole aerial is. Examples of these are "copper J-poles", "slim jim", "arrow". Bandwidth: 8+ Mhz. Section A, the antenna radiator is 3/4-wavelength long, so its dimension is found from:. which gives the amateur the capability of utilizing several radio bands with only one feed line. 2m/70cm Dual-Band 5 Watt C4FM/FDMA Digital Touch Screen Transceiver. 0 SWR at the midpoint of the 2M band, with SWR being 1:1. Share - 2 Meter Dual Band Collapsible Copper J Pole Antenna- Included. It operates as a J-Pole at 70 cm and 1/4 monopole at 2M with the help of radials. The authentic original KB9VBR ALL COPPER 144-148MHz 2 Meter VHF/UHF dual band ham amateur radio J-Pole antenna. - $34 (also available in 250 watt version for $54 - please email me for this special order item. jpg Easy VHF-UHF Antenna. 52 MHz 146 MHz 446 MHz 915 MHz. The J-pole antenna, also called the Zepp' antenna (short for Zeppelin), was first invented by the Germans for use in their lighter-than-air balloons. Figure 5 - Dual band J-pole with a 220 MHz copper pipe J-pole attached at the bottom. I wanted to build a antenna for my future base rig and was caught between the copper pipe J-Pole everyone knows about or the dual band solid aluminnum J-Pole. It is very durable and the SWR is also pre-tuned. The SIMPLE 2m/440 Copper pipe "J" Can you use a pipe cutter or a hack saw, can you solder - then here is how to build a SIMPLE "J" antenna that will more than double your 2 meter (and even 440) performance! by Dale "Kuby" Kubichek, N6JSX. Copper Dual-Band Super J-Pole Antenna Project. We are proud to offer them a somewhat lower price. As I mentioned in the last blog ("V. Copper Cactus Dual-Band Super J-Pole Antenna Projec t. ians mass produced this antenna during the VHF frenzy in the mid-80’s. Price: $49. A antena J Pole, tambm chamada de antena Zepp (abreviao de Zeppelin), foi inventada pelos alemes para uso em seus bales dirigveis. 2m/70cm Dual-Band 5 Watt C4FM/FDMA Digital Touch Screen Transceiver. Works well with handheld HT radios, base stations, scanners, and repeaters. full article pdf (792 kb) abstract:. The advantage of this is that if you upgrade from this you can use it as a mobile with the addition of a. Originally: $399. Copper Cactus Dual Band J-Pole Antenna Plans Copper Cactus Dual Band J-Pole Antenna Plans. Construction of the J-Poles is simple. This is a great antenna if you want to give it a try. PS: I was going to go with an aluminum than a copper. Make it cheap Copper Cactus Dual-Band Super J-Pole Antenna Project. A model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally. Both are omni-directional. 2m/70cm Dual Band J-Pole. The UHF Female is the default connector. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. I have personally built both types of antennas, definitely worth your time and energy!! Marc "G. 7 Comments The Art of Waiting Said,. Conejo Valley Amateur Radio Club, article edited by Rory Eikland, KG6HCU and Ken Larson, KJ6RZ, they have had excellent experience building and using J-Pole antennas, and share their experience on planning VHF and UHF Jpole antennas. On my site you can find both the all copper 2 meter J-Pole antenna and an all copper 2 meter Slim Jim antenna. 3dBi 5⁄8 wave x 3 446MHz 11. Figure 5 - Dual band J-pole with a 220 MHz copper pipe J-pole attached at the bottom. which gives the amateur the capability of utilizing several radio bands with only one feed line. Mobile \ Screwdriver. the 435MHz antenna, If you really want it to look neat, use 3/8" copper for the vertical and 1/4" copper for the transformer section (stub). Dipole Antenna for 40 80 160 meter: 557. Real-time band conditions; Latest posts Stealth 2 Meter Copper J-Pole for your HOA - AF5DN. J POLE ANTENNA DESIGN CALCULATOR by K4ABT; Design your Own Super J Pole; Pocket J-Pole Antenna for 2 Meters; Copper Cactus Dual-Band Super J-Pole Antenna Project ; very good resource about j-pole antennas, with detailed photos; 2-meter J-Pole from bicycle safety flag; J-Pole Antenna Help Information; Some J-Poles That I Have Known. Just Google "twin lead j-pole" and you'll find several good articles on how to construct one (which takes about 30 minutes). Two-Bands Half Sloper for 80m - 40m 42 67. Dual Band Super J-Pole Antenna Cevan Twilley. As I mentioned in the last blog ("V. We already published in the 9 J-pole-antenna-projects some samples of copper J-Pole antennas. [Photo by K8CH] Fig 22. The J-Pole antenna became so popular in the VHF band because of its simplicity in design and construction. A half wave radiator fed at one end presents a very high feedpoint impedance, at least several thousand ohms. A J-Pole is a 1/2 wave vertical with a 1/4 wave matching stub. It is also great for your base unit as the connectors are water tight. Indeed, although many folks like to bandy the gain advantage of a collinear. The DBJ-1: A VHF-UHF Dual-Band J-Pole - Bay-NetThe DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single the UHF antenna may have to be recalcu-lated, because of the change in velocity. 144/220/440MHz Tri-Band Handheld With D-Star & APRS. You will need an SO-239, Chassis mount connector, 1/16 Copper coated steel welding rod and #6 fasteners. I've built a few copper j-poles over the years. Ham Radio Crash Course 126,782 views. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. 5 metres Connection S0239 Construction is Stainless Steel whips and lightweight Aluminium bracket Wieght 0. After showing him this blog, he decided to make his own dual-band copper J-Pole, which he mounted to the roof of his QTH. An omni-directional antenna operable absent ground radials and providing at least 3 dB gain at a chosen wavelength relative to a dipole includes first and second like-oriented J-pole antennas and, coupled intermediate said J-pole antennas, a quarter-wavelength non-radiating delay line. the copper tubing. V-U Antenna J-pole bibanda - Benvenuti su OfficinaHF! _____ Una Jpole Bibanda per i 2metri e i 70cm La Jpole è una antenna a mezz'onda alimentata ad un estremo per cui il suo "guadagno" è praticamente pari a quello di un dipolo polarizzato verticalmente (0 dBd). Originally: $399. 00: Harvest CR 8900 (29/50/145/435mz) Quad Band Mobile Antenna $79. OSJ - Model OSJ 146/440 Dual Band J-Pole with Extra Labor Charge for Two Piece Element. Downloads • Links. 587GHz) in the lower frequency band and 4004MHz (3. Copper Cactus J pole antenna - 2 metter 70 Cm dualband By the way, I left 1 1/4" between the tuning section between the 57 1/2" and 38" lengths of copper. I have a dual band 2M/440 Slim Jim from Slim Jim Info, and it's made of ladder line. S11 of our 'photo-model', designed for 2. "Buck" Rogers Sr Practical Antenna Handbook by Joseph J. J-Poles do not need to choke the coaxial cable. 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. The antenna is en-closed in UV-resistant PVC pipe and can thus withstand the elements with only the antenna connector exposed. Teams went into action and created several components and sub-assemblies. ca Sources of Information Ideal 40 to 6 meter Antenn 44 feet, centered feed with ladder line to a point near your station. I regularly talk to 4 base stations simplex that are 15 and 20 miles away. pdf J-Pole with VSWR Adjustment. The proposed antenna provides a bandwidth of 403MHz (2. The Super J-Pole Antenna(Collinear Design) Below is a Javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole. Cushcraft R-7 Vertical and dual-band 'Copper Cactus' J-Pole Antennas are used for coverage of the higher HF frequencies, and the 2-meter and 70-cm bands. [22] The phasing stub between the two half-wave sections is often of the Franklin style. SWR should be < 1. If you find any other interesting links or information, let me know and I will include it here. AVAILABLE FROM AUSTRALIAN SELLER. Vertical \ Multi Band. Ruggedly constructed one piece design, this J-Pole antenna will last practically forever. Figure 5 - Dual band J-pole with a 220 MHz copper pipe J-pole attached at the bottom. The J-Pole has some gain over a quarter wave vertical and is omni directional. Arrow Antenna's dual band J-pole. Details about 2 meter/70cm Dual Band Collapsible Copper J Pole Antenna by KCØSDV Free shipping Indoor or outdoor location- Works Great in either one. Beam \ Tri-bander. SMA Male Antenna: 2 Meter Roll-Up J-Pole Antenna, 6 FT RG-174/U coax, SMA Male connector. J-Pole Antenna Calculator. 1) is an omnidirectional antenna, so called because of its similarity with the letter “J”. The resulting gain is closer to the optimum 3 dB over a conventional J-pole or halfwave antenna. Attach both RG174 cables for single fee. Stealth 2 Meter Copper J-Pole for your HOA - AF5DN 0. Item #: SUPERJPOLE * Marked fields are required. This is a true 1/2 wavelength performance at both VHF and UHF and with low SWR and was featured article in Feb 2003 issue of QST. The radiation pattern of J-pole-T antenna. You may use a Fiberglas rod (arrow shaft) as an insulator, but you will have to be very careful with the torch or you may weaken or burn the rod, or make it brittle. Ive read that J Poles should be grounded and I wanted some opinions on that. It operates as a J-Pole at 70 cm and 1/4 monopole at 2M with the help of radials. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. The Total length of the stub is about 1/4 wave length, and the bottom is the low impedance (virtual 0v) point. So, I decided that a pair of dual-band copper pipe j-pole antennas were in my future. Since then I found a good technique to overcome that problem. KL7JR HF COPPER PORTABLE VERTICAL. After taking it down, I found a number of. The UHF Female is the default connector. For best results, build the highest band first, for eg. 4 dB higher than the average gain of a single-radiator J-pole. Just finished this Dual Band J-Pole Antenna. J-Pole Antennas – Single and Dual Band J-Pole Antennas are very popular and you will find many websites with details for this antenna project. The Total length of the stub is about 1/4 wave length, and the bottom is the low impedance (virtual 0v) point. Copper Cactus Dual Band J-Pole Antenna Plans Copper Cactus Dual Band J-Pole Antenna Plans. Homebrew Dual-Band Copper J-Pole - Success! As a quick weekend project, I decided to make a pair of Dual-Band Copper J-Pole antennas for my Baofeng UV-82HP handheld (for 2 different QTH's). Your going to like this super J-pole project, This home made j-pole is easy to build and sturdy, While looking for an J-Pole antenna project to build I remembered seeing a Marine antenna called the Super J-Pole in the 1988 ARRL Antenna Handbook, which claimed a 6 db gain over a quarter wave ground plane. (can not obtain good VSWR on 440 but the 2m gain is outstanding - about 6dbd worth!) EXPERIMENT, create you own unique designs the "J" is a very forgiving, yet,. Copper Cactus Dual-Band Super J-Pole Antenna Projec t. Share your thoughts. Not all of us have unlimited real estate and 120 foot towers at our disposal. Dual band 144/440 MHz HT antenna combines telescopic and foldover features in a single antenna. 700 amateur radio topics - 6,000 links & 133 pages - from antennas to zones. This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. tional single band ribbon J-Pole design to dual-band operation. Build and Review - Dual Band J-Pole 144/440Mhz. Super J-Pole Antenna Project - Duration: 9:12. A copper pipe J-Pole antenna is a single band antenna that is much like a. 40 Meter J Pole Antenna. Our Products >> Super Dual Band J-Pole Antenna Super Dual Band J-Pole Antenna. Heavy-duty super sturdy 5/8 coupling nut for added resilience. The center insulator (see Figure 3) is made from 1/ 2-inch. 60 RADIATOR, 1/2 Wave 300 Ohm Plastic Twin-STUB, 1/4 Wave A B <— NO CONNECTION, CUT AND REMOVE TO END —> To A To B 50 Ohm Coaxial Cable FREQUENCY (MHz) RADIATOR (Inches) STUB (Inches). I have seen this basic diagram in at least five different sites. Once tuned, sweat the tubes to the straps so it stays put. Originally: $549. Unfortunately, due to the rise in material prices, there will be a light increase in the price of the J-Pole antennas. After taking it down, I found a number of. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. Aviation fans prefer this antenna as Aviation band (Airband) Mhz J-Pole Antenna. It is the same antenna that appears on the front cover of the ARRL VHF/UHF Antenna Classics Handbook. Ruggedly constructed one piece design, this J-Pole antenna will last practically forever. 3dBi 5⁄8 wave x 3 446MHz 11. Parts needed 10 ft of ½ copper pipe (3) "T" Fittings (3) M to F 90 degree elbow fittings (1) reducing fitting (3) feed lines of 50 ohm coax V. Ed and I worked out a deal where. Copper Pipe J-Pole Antennas A copper pipe J- Pole antenna is a single band antenna that is much like a half wave dipole in that it is relatively easy to build , and when you are done you. Wideband dual-band antenna. It also won the best paper of the month award. Your going to like this super J-pole project, This home made j-pole is easy to build and sturdy, While looking for an jpole antenna project to build I remembered seeing a Marine antenna called the Super J-Pole in the 1988 ARRL Antenna Handbook, which claimed a 6 db gain over a quarter wave ground plane. J-pole antenna explained. Com :: J Pole Antenna Overview, summary, tutorial about the J antenna, often referred to as the J pole Antenna. The DBJ-1 is easy to construct using inexpensive materials from your local hard-ware store. J Pole Antenna Length Calculator. Why build antennas out of copper and not aluminum or stainless steel. pdf Generic J-Pole Calculator. Item #: SUPERJPOLE * Marked fields are required. A model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally. I do not know who did the original, but there are variations in several of them. Qty: * Super Dual Band J-Pole Antenna Reviews (0) Write a Review. 490 MHz, High in/low out, 1 MHz offset, 12. 884GHz) in the upper frequency. This is a huge score for the money and boosts your signal a great deal. In my design I use 1/2" copper schedule M tubing and 1/4" soft copper tubing. So I started the Aluminum J-Pole project and documented my. Kinsner, VE4WK J-POLE ANTENNA FOR 2m 3 of 3 1 2 3 4 5 6 7 8 E D C B A E D C B A 1 2 3 4 5 6 7 8 5 June 1992 J-POLE PARTS LIST PROCEDURE P2 M1. Examples of these are "copper J-poles", "slim jim", "arrow". The antenna is tuned by sliding it up or down in relation to the mount and straps. J-Poles need radials. A triple-band antenna for ambient RF energy harvesting system operating Y X Z 0 45 90 (mm) F : Geometry of the proposed dual-band antenna. Since I had a Metal Fabrication background, I thought this would be an easy build. 4 GHz and 5. on top of my house, i can reach a repeater 90 to 100 miles away J-pole Antenna on WN Network delivers the latest Videos and Editable pages for News & Events, including Entertainment, Music, Sports. ARRL's PDF on twin-lead J-Pole antenna. I saw the plans for this on the internet ( link to plans) by Allen Lowe (N0IMW). Homebrew 80 meter flat-top dipole up 50 feet. This is a huge score for the money and boosts your signal a great deal. 540 inch OD). 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING. The J-pole antenna, also called the Zepp' antenna (short for Zeppelin), was first invented by the Germans for use in their lighter-than-air balloons. Beam \ Tri-bander. Thick aluminum base plate. 5:1 on VHF and a little more on UHF, IIRC. The Copper cactus antenna Copper Cactus multiband J-Pole antenna J-Pole antenna design Complete guide to build Jpole antennas with online dimensions calculator. Getting your antenna in the air can sometimes be challenging. Careful measurements and soldering skill condenses the soldering construction time into a few brief hours. Brazing rod is used for the 2-m radiator and for the 70-cm decoupling stub. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. If they ask I tell them its for my FM radio receiver, stealth is my middle name now. However, it is imperative that you use the proper coax for the highest band of operation, RG58 just won't cut it and even RG8 in lengths longer than 25 feet is marginal in 440 operation. Building Suggestions. The authentic original KB9VBR ALL COPPER 144-148MHz 2 Meter VHF/UHF dual band ham amateur radio J-Pole antenna. Low SWR on all frequencies. Yates, AA5TB · J-Poles Exposed-- From Gary E. Your going to like this super J-pole project Radio-Electronics. Vertical \ Monoband. A touch of Class, The Windom and the J-POLE By Glynn E. Figure 5‐Dual band J‐pole with a 220 MHz copper pipe J‐pole attached at the bottom. (can not obtain good VSWR on 440 but the 2m gain is outstanding - about 6dbd worth!) EXPERIMENT, create you own unique designs the "J" is a very forgiving, yet,. The attic option imposed a height restriction on the antenna of 66 inches maximum, and if the rooftop exterior option was necessary Randy wanted a low profile antenna. 98 — Diagram of WA3WMG’s dual-band 146/446-MHz mobile whip. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. Heavy-duty super sturdy 5/8 coupling nut for added resilience. This invention relates to a multi-band antenna and more particularly to a switched, dual band, retractable antenna for a cellular communication device with the antenna automatically operating at two different frequency bands when the antenna is in its retracted position and when it is in its extended position. We thought some of you may be interested in it. I do not know who did the original, but there are variations in several of them. 5:1 on VHF and a little more on UHF, IIRC. Heathkit HW-101 (To be repaired) Other Interests Woodworking and photography. It is designed for installation of any HF mobile antenna to the floor of a pick up bed. Find more of what you love on eBay stores! 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole. Not practical for implementationalthough triband operation is achieved. The Super-J variation of the J-pole antenna adds another collinear half-wave radiator above the conventional J and connects the two with a phase stub to ensure both vertical half-wave sections radiate in current phase. (can not obtain good VSWR on 440 but the 2m gain is outstanding – about 6dbd worth!) EXPERIMENT, create you own unique designs the “J” is a very forgiving, yet,. A model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally. Dual band 144/440 MHz HT antenna combines telescopic and foldover features in a single antenna. A copper pipe J-Pole antenna is a single band antenna that is much like a half wave dipole in that it is relatively easy to build, and when you are done you achieve the satisfaction of having built a very good antenna that works as well as expensive commercial antennas. Copper Cactus Dual-Band Super J -Pole Antenna Project 2 meter 70 Cm Home brew antenna All the materials except the S0239 fitting can be found at any good hardware store, and the whole antenna can be made in less than an hour. This essentially creates an end fed dipole yet still retains the j match system. Yaesu FT-60R dual band ht. Ham Radio Antenna Home Brewing Copper Base Radios Diy Projects Tech Ideas Ants. Ed and I worked out a deal where. About the J-Pole. Dual Band (2 Meter/70 cm) Solid Aluminum J-Pole. com J-Pole dimension calculator for different frequencies at mJw. The antenna can be mounted to any kind of mast since the bottom portion (part sticking down from the "U") is at ground potential anyway. dual band j-pole antenna This antenna went up in just a few minutes with four hose clamps and the parts provided with the antenna. php 8271 Bytes 12-02-2018 11:22:38. Here, a dual-band AMC, resonating at 2. This is important because if the mast extends above the antenna ground plane it will affect the performance of the antenna. Super Heavy-Duty, 1. A variation of the J-pole is the Slim Jim antenna, also known as 2BCX Slim Jim, that is related to the J-pole the way a folded dipole is related to a dipole. Since I like making things, a homebrew antenna was in order. Works well with handheld HT radios, base stations, scanners, and repeaters. The gamma match is a piece of 1/4 inch copper tubing which is soldered into a hole drilled in the appropriate place along the 1/2 inch pipe. I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). The Super J-Pole antenna for 430 - 450MHz was constructed and used for FM simplex and repeater operation at my previous residence in Melbourne, Victoria from 2002 - 2007 The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a. You may use a Fiberglas rod (arrow shaft) as an insulator, but you will have to be very careful with the torch or you may weaken or burn the rod, or make it brittle. I also got ideas to improve the J-pole by fabricating a mount that I I will be able to rivet and solder on the SO-239 connector and also solder it to the pipe with ease. I could have used galvanized but I plan on tack welding then. VHF ¼ wave mobile VHF rubber duck Standard VHF J-Pole Dual Band J-Pole-24. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 16 An Even Better J-Pole - Electrically • The gain is about 7. This is because we have compensated for the velocity factor of the pvc pipe. 62 - Dual-band Loop Antenna for 30m - 40m 63 - Wire-Beam Antenna for 80m 64 - Dual-Band Sloper Antenna 65 - Inverted-V Beam Antenna for 30m 66 - ZL-Special Beam Antenna for 15m 67 - Half-Sloper Antenna for 160m 68 - Two-Bands Half Sloper for 80m - 40m 69 - Linear Loaded Sloper Antenna for 160m 70 - Super-Sloper Antenna 71 - Tower Pole as a. When mobile, I installed a Tram 1185 mag-mount antenna (which also works well, especially with the new FTM-100DR!). 2 at the band edges. Cebik W4RNL 2 Meter Halo Antenna By N2KBK Copper Cactus J-Pole antenna-- Plans for 52, 146, 223. This invention relates to a multi-band antenna and more particularly to a switched, dual band, retractable antenna for a cellular communication device with the antenna automatically operating at two different frequency bands when the antenna is in its retracted position and when it is in its extended position. It is designed for installation of any HF mobile antenna to the floor of a pick up bed. Free shipping. dual band j-pole antenna This antenna went up in just a few minutes with four hose clamps and the parts provided with the antenna. 5:1 or better over the entire band. The J-Pole is my all-around antenna, what I use for general 2 meter stuff like connecting to my local repeaters using my main 2-meter radio. The authentic original KB9VBR ALL COPPER 144-148MHz 2 Meter VHF/UHF dual band ham amateur radio J-Pole antenna. Copper Cactus J pole antenna - 2 metter 70 Cm dualband homebrew J-Pole 2mt 70 CM antenna Project. The center insulator (see Figure 3) is made from 1/ 2-inch. This antenna provides continuous coverage of the 2 metre (144 - 148MHz) and 70cm (430 - 450MHz) bands and is an excellent choice for base station use. I'm going to build one for a temp antenna. An SO239 jack was screwed to one pipe and a piece of copper wire was soldered to the center output of the SO239 and then connected to the other pip with a sheet metal screw. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. Plans for Dual Band J-Pole 1. It works great! A good detailed, step by step construction guide would be great, with pictures and video. 2-1 at 146 MHz and <1. Now I want to try 146mhz, dual band (144/440) and possibly a 6 meter. The Romex Dual Band J-Pole antenna project is completed. Page 3 of 3 - effective dual band yagi for gmrs - posted in Equipment Reviews: I use Googe Earth for bearing, distance and it will give an elevation profile which is great for line of site issues. IT IS FITTED WITH AN SO 239 CONNECTION PACKED INSIDE A PVC TUBE FOR SHIPPING AND THIS IS YOUR MAST ASWELL 50 OHM SWR less than 1. 2 Meter Dual Band Collapsible Copper J-Pole Antenna This J-Pole is made from 1/2 inch copper pipe and can be broken down into 2 pieces, each about 34 inches, which makes it convenient to use for Ecom, Public Service and Field Day events, etc. This calculator is designed to give the horizontal length of a particular dipole (including Tees) antenna, or one side of it, for the frequency chosen. 1 The antenna tuned easily, and oper- ated well for a few years until nature did it in. Mobile \ Multi Band. See my previous "J Pole Antenna Stand" project here!. Copper Cactus Dual-Band Super J-Pole Antenna Projec t. The ZOI Flowerpot is an end-fed half wave antenna for 2m made from nothing more than RG58 coax and 25mm PVC pipe. Black Horizon: How to build a $5,000 dollar UHF SATCOM antenna for under $20 Part 4-1. Antennas Type. Indeed, the Super-J will never approach the gain advantage of a properly separated two element collinear antenna, but we can get closer to this goal. Looking to upgrade your home entertainment system? Solid Signal has everything you need to get the job done! We stock DIRECTV and Dish Network dishes and receivers, HDMI cables, wireless cellphone signal boosters, home security systems, satellite installation tools including multiswitches and cables and other satellite tv products!. I use mine on a daily basis on my Winlink 2000 station. Construction of the J-Poles is simple. pdf Generic J-Pole Calculator.