Copper Dual Band Super J Pole Antenna


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. Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner DELUXE MODEL ROLL UP 2M/70CM ROLL UP J-POLE/SLIM JIM ANTENNA WITH 10FT COAX End Fed Dipole 80-6 meter Portable HF Antenna Matchbox System. This page is broken. Trailed behind the airship, it consisted of a single element, one half wavelength long radiator with a quarter wave parallel feedline tuning stub. Built to survive harsh northern winters, heavy snow, ice and strong winds - has super-strong large diameter fiberglass and heavy-duty 14 gauge stranded hard copper wire. 99 — WA3WMG’s whip can be used to make a dual-band groundplane antenna. Works well with handheld HT radios, base stations, scanners, and repeaters. Add the copper pipe clamps to the J-pole radiator (clean the copper pipe and the pipe clamps with sandpaper on the outside and inside, as well as the radia-tor and stub match), as shown in Figures 1 and 2. PVC legs were added to give it some stability. GM0ONX Inverted L Antenna. 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. Ed and I worked out a deal where. I am no expert in antenna design but enjoy playing with different ideas. Copper prices continue to rise, J-Pole price increase January 1, 2011. Heathkit HW-101 (To be repaired) Other Interests Woodworking and photography. gif J-Pole Theme. com Hawking Technology 10dBi Dual Band Omni Ant Kit [ HWK HOD10IP ] Hi-Gain Dual-Band Wi-Fi 10dBi Mimo Omni-Directional Kit (2. This is the famous DBJ-1 dual band J-Pole antenna, designed and sold by Ed Fong - WB6IQN. Not practical for implementation although triband operation is achieved. Heavy duty construction out of 1/2 inch copper tubing. This calculator can be used to design a Slim Jim or a J Pole antenna. BACKGROUND OF THE INVENTION. a super capacitor to power a sensor node to. S11 of our 'photo-model', designed for 2. 5:1 on VHF and a little more on UHF, IIRC. We thought some of you may be interested in it. Works well with handheld HT radios, base stations, scanners, and repeaters. 49" 36" Prototype was made of 1/2 inch copper pipe. Comparison of “Coil-Super-J” to the Super J-Pole Antenna. It works for 2m and 70cm. Manufacturer Tram Product Narrative Dual Band 2M/70cm Base/Repeater Antenna. 69 Add to cart; Sale! 2-Way Coax Antenna Switch CX-201U $ 34. The J pole is certainly easier to construct as there is. ( 3 customer reviews) Whether you are operating portable or permanent, you will find the convenience of a dual-band Log Periodic antenna to be an incredibly convenient and powerful tool in your ham operations. The antenna on the right is the 154 MHZ J Pole I built. 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. Wideband dual-band antenna. 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. Attach both RG174 cables for single fee. the copper tubing. AWESOME TO DEAL WITH. Keith O'Brien" wrote: > Has anyone constructed a Dual Band (144/440) J Pole antenna, that they could > supply the materials and dimensions used. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. 49” 36” Prototype was made of 1/2 inch copper pipe. (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,. 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. (Click here for larger photo ~176K) (Click here for original photo ~1MEG). Mobile \ Single Band. See the main page for more information. The authentic original KB9VBR ALL COPPER 144-148MHz 2 Meter VHF/UHF dual band ham amateur radio J-Pole antenna. 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. Real-time band conditions; Latest posts Stealth 2 Meter Copper J-Pole for your HOA - AF5DN. If you are going to just get a Technician license for UHF/VHF, at least get the $30 dual band antenna that I have linked in the article. My latest purchase was a new antenna dedicated to the civilian airband 108-136 MHz. During past month. Thunderpole Super Nova | CB 26-30 MHz AM/FM/SSB Mobile Antenna. 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. Figure 5 presents the peak gain of the proposed dual-band antenna. 2 meter/70cm 3/4 inch Dual Band Collapsible Copper J Pole Antenna- FREE SHIPPING. Below is the band plan being proposed by the Texas VHF-FM Society: 146. So dual band J-Pole arrangement is a bit tricky, and thus the strange dual stub arrangement of my old copper pipe antenna. 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. 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. CopperDual-Band Super J-Pole Antenna by KA0NAN, I'm working on a new article for making a dual band J for your car. 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). A J-Pole offers about the same gain performance as a half-wave dipole. com FREE DELIVERY possible on eligible purchases. ) Short wire antennas (also read this post on ULTIMAX) Portable Tri-Bander; Notebook antenna; On SWL; $2 4ft fiberglass post with wire clips. 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…”. Omnidirectional telescoping. I saw the plans for this on the internet ( link to plans) by Allen Lowe (N0IMW). Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. It operates as an end-fed half-wave antenna. The proposed antenna provides a bandwidth of 403MHz (2. Tactical and Survival Gear a 2 meter antenna made of copper tubes offering circular polarization. J-Poles Smoke the Competition. SWR should be < 1. J-pole antenna explained. I don't have a tuner/analyzer so don't know what the SWR is, but others that have built them report less than 1. W6RYX Antenna – Part 3 (W6RYX) May 2010. I am using the KB9VBR slim jim (and have the take down j-pole for camping). Assembled Open Stub J-Pole. 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. When copper tubing is used, the entire assembly can be soldered together, ensur-ing electrical integrity, and making the whole antenna weatherproof. The caps are optional and are for the prevention of mud dauber nests. Excellent gain 2m 144-146 MHz and 430 - 440 MHz 70cm antenna. I plan on making a new j-pole with a different balun type. Shop in Amateur-Radio-Antennas- from cliffscustomcutouts. DBJ-1 (commercial) dual band base antenna - (152-157 MHz and 460-470 MHz). Attach both RG174 cables for single fee. 2015 High Performance Wire Antenna’s Presentation by John Grow VE2EQL EMAIL: [email protected] You will need basic workbench/shop tools for cutting a drilling metals (e. 4 dB higher than the average gain of a single-radiator J-pole. Com :: J Pole Antenna Overview, summary, tutorial about the J antenna, often referred to as the J pole Antenna. 6dB Gain 5/8 Wave Factory Pre-Tuned Base Loaded NMO - Solid Brass Chromed Threads Built-In "O Ring" Seal to Protect from Moisture Center Load - Stainless Steel Whip UV Sun Resistant Body Spring Loaded Gold. Yaesu FT-60R dual band ht. 4 MB: E4000 Elonics - Schema Rev4. The aluminum J-Pole appeared to be harder to build of the two so I decided if it was harder to build the better it would be. J-Poles have a "DC ground" point. The 'Super Nova' is a high performance CB mobile antenna from THUNDERPOLE. I live at 1150' ASL and the other stations are at 100' or less. 3 dB -45 dB -38. gif Plumber's Delight Copper 2m J-Pole. Notes: The J-pole antenna is a half wave radiator fed by an included 1/4 wave matching section. Wideband dual-band antenna. Gain: 6 dbi, 7 degree takeoff angle. full article pdf (792 kb) abstract:. Hawking Tehnology Hi-Gain Outdoor Dual-Band Wi-Fi 10dBi Mimo 2. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas. Our Products >> Super Dual Band J-Pole Antenna Super Dual Band J-Pole Antenna. 2M Aluminum Slim Jim Antenna. 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. I did it by building the dual-band J pole shown in Figure 1. Unfortunately, due to the rise in material prices, there will be a light increase in the price of the J-Pole antennas. Built to survive harsh northern winters, heavy snow, ice and strong winds - has super-strong large diameter fiberglass and heavy-duty 14 gauge stranded hard copper wire. A J-Pole is a 1/2 wave vertical with a 1/4 wave matching stub. Now Includes Maratac RPVC Large Case. J pole antenna DBJ-1- a VHF-UHF Dual-Band J-Pole antenna, pdf file: J pole antenna building A 2-meter J-Pole antenna: J pole antenna a javascript for calculating the lengths of tubing to be used for the construction of a Super J-Pole antenna: J-pole antenna: J-pole antenna: J-pole antenna a number of antenna designs. 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). (MHz) 144-148 & 440-450 MHz Gain (dB). 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. I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna. 4-1 at 144 &148 MHz. ( 3 customer reviews) Whether you are operating portable or permanent, you will find the convenience of a dual-band Log Periodic antenna to be an incredibly convenient and powerful tool in your ham operations. When you figure it out, let me know. Originally: $549. Antenne Radios Radio Hf Antenne Radioamateur Projets Électriques Énergie Alternative Brassage Maison Radio Amateur. We fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, with a resonant frequency toward the lower end of the 2-meter Amateur band and a VSWR of 1. The antenna I constructed was made of 1/2" tubing. 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. Positive Feedback. 40 Meter J Pole Antenna. The antenna is tuned by sliding it up or down in relation to the mount and straps. J-Poles need radials. In my design I use 1/2" copper schedule M tubing and 1/4" soft copper tubing. We thought some of you may be interested in it. 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 (2 Meter/70 cm) Solid Aluminum J-Pole. SMA Female Connector. It is also great for your base unit as the connectors are water tight. Dipole Antenna Length Calculator Dipoles antennas are easy to build and can be very effective when placed half a wavelenth or more above ground. Now I want to try 146mhz, dual band (144/440) and possibly a 6 meter. Dual Band Outdoor Directional Antenna The ANT70-1000 directional antenna is a high gain, high-performance dual band antenna for indoor and outdoor installation. Our version of the antenna is based on our previous very. 2015 High Performance Wire Antenna’s Presentation by John Grow VE2EQL EMAIL: [email protected] 3 dB -45 dB -38. , 2-section antenna features a heavy-duty fiberglass base station, an insulated conductor, a 144-148 MHz /440-450 MHz frequency range, 6 dBd gain VHF/8 dBd gain UHF, and a power capacity of 200-Watt. For best results, build the highest band first, for eg. It reminds me of two “Wouff Hong” (created by Hiram Percy Maxim) joined together at the base creating an awesome signal. I used a dual band hand held radio as a signal source and a Kenwood VHF/UHF power and SWR meter as a tuning indicator. Building J-Pole amateur radio antennas category is a curation of 86 web resources on , J-Pole Antenna for your Packet Radio Station, The J-pole Antenna Revisited Yet Again, The Copper Cactus J-Pole. B) 12" = 30 cms. This antenna is not designed to be connected directly to a radio. My latest purchase was a new antenna dedicated to the civilian airband 108-136 MHz. 51” roll-up J-pole for 440 MHz is like MFJ-1730, but shorter. The basic configuration of the ribbon. The advantage of this is that if you upgrade from this you can use it as a mobile with the addition of a. Loop antennas are usually directive off the broad side of the antenna. Find many great new & used options and get the best deals for Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner at the best online prices at eBay! Free shipping for many products!. Tower Pole as a Vertical Antenna for 80m 44 70. Most of the J Poles I've seen are made of copper pipe or aluminum tubing Blackbird VHF/UHF JPOLE Base Antenna 2M/70CM - Main Trading Company. The UHF Female is the default connector. I don't have a tuner/analyzer so don't know what the SWR is, but others that have built them report less than 1. Indeed, although many folks like to bandy the gain advantage of a collinear. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. After evaluating several commercial options he selected the Arrow OSJ 146/440 J-Pole antenna. Dual-band 95-1100MHz. 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. The antenna on the right is the 154 MHZ J Pole I built. Copper Dual-Band Super J-Pole Antenna Project. A 146- and 445-MHz J-Pole Antenna - N5DUX Oct 2, 2000 etting on 146 and 445-MHz with a single J-pole antenna can be done inexpensively. AVAILABLE FROM AUSTRALIAN SELLER. This collapsible J-Pole is made from 1/2 copper pipe and can be broken down into 2 pieces for easy storage. The Copper Cactus J pole antenna design is a simple amateur radio antenna model that will allow you to operate both bands with good performance, it is easy to make and the web offer several projects and examples we. com Copper J-Pole Antennas by dxzone. J-Pole Antenna Calculator. ) This is an excellent performing J-Pole type antenna, constructed from readily available materials. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas. 00: Retech RHA-701 dual band. Super J-Pole Antenna Project - Duration: 9:12. In my design I use 1/2" copper schedule M tubing and 1/4" soft copper tubing. Make it cheap Copper Cactus Dual-Band Super J-Pole Antenna Project. My main shack location has a commercial J-Pole Dual band mounted on a short mast. A previously derived theory is applied to a microstrip antenna with a reactive load to produce a dual-band radiator. 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,. 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. It operates as an end-fed half-wave antenna. pdf J-Pole with VSWR Adjustment. ) OSJ - Business Band, Marine Band & MURS 150-162 MHz. 2m/70cm Dual-Band 5 Watt C4FM/FDMA Digital Touch Screen Transceiver. After taking it down, I found a number of. Still another way is to block common mode waves by burying the cable. Ed Fong, WB6IQN, designed this 2meter/440 dualband J-pole antenna made of 300 ohm twin-lead that fits inside this thin-walled PVC pipe. 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. 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. This worked for a friend who had one of the twin-lead J-poles at the house. It does not need a ground plane, radials or a complicated matching system. Now con-nection to normal coax is easily made below the antenna. a super capacitor to power a sensor node to. 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. J-Pole Antenna Plans (these files are now located on our web server) Dual Band Jpole. Home Brew Dual Band j-pole antenna plans Your going to like this 2/70 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and sturdy, While looking for an antenna project to build,. 95: Sirio HP 2000C VHF 2m Radialess Mobile Antenna $49. 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. 10 rrsEcr10N "FIX" ANTENNA TO MAST 2 INCH HOSE CLAMPY "U" BOLTS A 6 Meter J-Pole Antenna Author: K4ABT Created Date:. It is tuned with an antenna analyzer for the lowest SWR in the middle of the MURS frequencies. The caps are optional and are for the prevention of mud dauber nests. Thick aluminum base plate. This is a GREAT little antenna for performance. They went together pretty easy, and then were zip-tied to a spare PA speaker stand I had laying around to get the tip of the 2m element about 15' in the air. Aug 3, 2017 - Home Brew Dual Band j-pole antenna plans Your going to like this 2/70 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and sturdy, While looking for an antenna project to build,. One of the. KL7JR DUAL BAND VERTICAL HF WIRE. Thus it is about 3/4 wave tall at the operating frequency. Arrow Antenna's dual band J-pole. The connection between the gamma match and the connector (I used BNC but use what you like. 99 Add to cart; 50FT Copper Antenna Wire 15-630 $ 16. The basic configuration of the ribbon. Overall length inches (J Pole) inches (Slim Jim) B. It is a vertically polarized antenna with two elements: a ¾ wavelength radiator and a ¼ wavelength matching stub. vhf - uhf band plan chat j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. It certainly shows what can be done by applying a little patience. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. Antenna for the 220 MHz Band (1. 52 MHz 146 MHz 446 MHz 915 MHz. DUAL BAND 2 METER 144 / 440 MHz 5/8 WAVE NMO MOBILE ANTENNA AMATEUR BANDS - $33. These agree well with the real j-pole and 2BCX antennas measured in a real antenna test chamber in figure 2. This is important because if the mast extends above the antenna ground plane it will affect the performance of the antenna. They went together pretty easy, and then were zip-tied to a spare PA speaker stand I had laying around to get the tip of the 2m element about 15' in the air. com Copper J-Pole Antennas by dxzone. MFJ-1812, $19. This durable antenna will provide years of trouble free service. During past month. I was looking for something that was vertical, omnidirectional and with good gain that I could make quickly and easily. 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. This is an Imperial version of the calculator. 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. 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. Ferrite choke installed on cable. Tiger Tail Radial (W6OAV) Mar 2016. V in s for structural health monitoring applications. The aluminum J-Pole appeared to be harder to build of the two so I decided if it was harder to build the better it would be. Dual-band 2m/70cm. Most of the J Poles I've seen are made of copper pipe or aluminum tubing Blackbird VHF/UHF JPOLE Base Antenna 2M/70CM - Main Trading Company. At this point it’s pretty crystal clear Fred Judd’s 2BCX Slim Jim antenna doesn’t offer anything special compared to a traditional J-pole antenna. DBJ-1 (commercial) dual band base antenna - (152-157 MHz and 460-470 MHz). I took the basic design from Dale Kubichek, N6JSK web page. 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. The antenna is tuned by sliding it up or down in relation to the mount and straps. Dual band 144/440 MHz HT antenna combines telescopic and foldover features in a single antenna. 72 + Tax for complete set-up. Your going to like this 2/70 Dual Band J-pole Antenna Plans known as the Copper Cactus Dual Band J-Pole, This home-brew j-pole antenna is easy to build and sturdy, While looking for an antenna project to build, I remembered seeing a Marine antenna called the Super J-Pole in the which had db gain over a quarter wave ground plane. 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. 8 pF and it would be perfectly matched to 50Ω. 4 MB: E4000 Elonics - Low Power CMOS Multi Band Tunner - Datasheet: 1. Write a Review. item 1 Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner - Premium KB9VBR J-Pole Base Antenna 2 meter dual band amateur ham radio scanner $33. 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. 4-1 at 144 &148 MHz. 8 pF and it would be perfectly matched to 50Ω. It does not need a ground plane, radials or a complicated matching system. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. J-Pole Antenna Plans The J-Pole antenna is fundamentally an end-fed 1/2-wavelength antenna that uses a 1/4-wavelength long transformer section to supply the very high feed voltage. Kite and Balloon Lifted Antennas from G4VGO K6STI Receiving Loop — "the DX secret weapon" L. pdf J-Pole with VSWR Adjustment. Build a Copper J-Pole antenna. Antenne Radios Radio Hf Antenne Radioamateur Projets Électriques Énergie Alternative Brassage Maison Radio Amateur. A copper pipe J-Pole antenna is a single band antenna that is much like a. Heavy-duty super sturdy 5/8 coupling nut for added resilience. I saw the plans for this on the internet (link to plans) by Allen Lowe (N0IMW). I have never been a big HF operator but i do enjoy the odd QSO on 160m,80m,40m,10m. You will have to bend them Figure 2—The antenna components—ready for construction. Be the first to write a review. Why build antennas out of copper and not aluminum or stainless steel. The basic configuration of the ribbon. 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). Manufactures antennas, SWR meters and power supplies primarily for the Amateur Radio market. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. ) Solid Aluminum - End Fed (SO239 Connector Only). Ham Radio Antenna Home Brewing Copper Base Radios Diy Projects Tech Ideas Ants. 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. The best ground for such a purpose will be a earth ground near the antenna and far from utility lines. A J-Pole antenna disclosed including: shunt segment extending out of the plane of the J-Pole antenna. With the lead -in coax, total length approaches 8ft. 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. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. An Easy Dual-Band VHF/UHF Antenna (658,950 bytes, PDF file) QST September 1994, pp. Dipole, balun and connector view: Easy to mount and dismount up to 70mm - 2 1/2" bracket: Boom end: All elements marked:. 1 12 November 1992 r. 11b and 802. This value is about 2. The fully constructed antenna is then clamped to a grounded metal pole. 40 Meter J Pole Antenna. com Home Brew Dual Band j-pole antenna plans Your going to like this 2/70 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and. Arrow Antenna A 146/440 J-pole. I don't have a tuner/analyzer so don't know what the SWR is, but others that have built them report less than 1. The radiation pattern of J-pole-T antenna. which gives the amateur the capability of utilizing several radio bands with only one feed line. This durable antenna will provide years of trouble free service. 1) is an omnidirectional antenna, so called because of its similarity with the letter “J”. Dual Band VHF/UHF Slim Jim Antenna. 440 Super J-Pole Antenna by KA0NAN, April 1996. Be the first to write a review. Trailed behind the airship, it consisted of a single element, one half wavelength long radiator with a quarter wave parallel feedline tuning stub. The antenna is broad-banded and should therefore provide a low SWR across the entire 2-meter band. Carr Design by G. Dual-band 95-1100MHz. We are proud to offer them a somewhat lower price. 00: Retech RHA-701 dual band. You can make the ladder line J-pole weather proof by inserting it into a PVC pipe and placing an end. Amateur Radio2 Meter Slim Jim J-Pole Antenna The Slim Jim Antenna is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. 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. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. 99 — WA3WMG’s whip can be used to make a dual-band groundplane antenna. Instead I went with 300 ohm TV twin lead for my J-Pole and it works pretty good at 1. 99 Add to cart; 5W Dummy Load w/ Lamp DL-52 $ 6. Dual Band Outdoor Directional Antenna The ANT70-1000 directional antenna is a high gain, high-performance dual band antenna for indoor and outdoor installation. 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. Wideband Discone Antenna. 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. The tee had to but trimmed so I could get the proper spacing I added copper sweat to threaded couplers on the bottom so I could use some black pipe fittings and flanges for mounting. THIS DUAL BAND ANTENNA IS CONSTRUCTED FROM STAINLESS STEEL TUBE, ALL PARTS. 40 Meter J Pole Antenna. To visualize the antenna, one must only picture a 3 half-wavelength vertical and a 2 quarter-wavelength vertical positioned a few inches away from and centered on the the tall vertical. KL7JR VERTICAL DIPOLE And a novel matching method. this is the best dual band j-pole ever built 2m - 70cm direct. 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. √ The EZ HD TV antenna is quality built and made in the USA. Plans for Dual Band J-Pole 2. Amateur Radio 2 Meter Slim Jim J-Pole Antenna. 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. Id rather thread thinner solid aluminum than to solder copper. Copper Cactus J pole antenna - 2 metter 70 Cm dualband homebrew J-Pole 2mt 70 CM antenna Project. 3/4 INCH COPPER PIPE 165 INCHES (13 ft 9 inches) 3/4 INCH STAINLESS STEEL HOSE CLAMR ATTACH CENTER CONDUCTOR OF COAX cui AND AT 14 mc FROM OF 3/4". Be the first to write a review. Not practical for implementationalthough triband operation is achieved. So, I decided that a pair of dual-band copper pipe j-pole antennas were in my future. Yaesu FT-60R dual band ht. Wide Band Width (150 - 162 MHz. 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. J-pole antenna Last updated September 23, 2019 J-Pole Antenna. 70 Tower Pole as a Vertical Antenna for 80m. Frequency MHz Velocity Factor (see text*) vf Actual wavelength inches Wavelength considering velocity factor inches A. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. Ham Radio Crash Course 126,782 views. Figure 4 The dual band J-pole modified for portable operation. Wire Antennas for Ham Radio Dual-band Loop Antenna for 30m - 40m Super-Sloper Antenna. 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. I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna. A balun is necessary because a J-pole antenna uses a balanced feed (the. Parts Needed. Notes: The J-pole antenna is a half wave radiator fed by an included 1/4 wave matching section. AN ALL-COPPER 2-M J-POLE Rigid copper tubing, fittings and as-sorted hardware can be used to make a really rugged J-pole antenna for 2 m. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas. Generally speaking, the higher you want the gain to be, the taller the antenna will be. 03-ago-2017 - Home Brew Dual Band j-pole antenna plans Your going to like this 2/70 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and sturdy, While looking for an antenna project to build,. When mobile, I installed a Tram 1185 mag-mount antenna (which also works well, especially with the new FTM-100DR!). This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. Super-Sloper Antenna 44 69. 10 METER “SUPER SCANNER” HF MULTIBAND VERTICAL Convert that old CB Antenna. (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,. 2m/70cm Dual Band J-Pole. Two-Bands Half Sloper for 80m - 40m 42 67. The connection between the gamma match and the connector (I used BNC but use what you like. So dual band J-Pole arrangement is a bit tricky, and thus the strange dual stub arrangement of my old copper pipe antenna. 2-1 from 440 - 450 MHz. Fiberglass, 3 sections 146MHz 8. 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. VHF ¼ wave mobile VHF rubber duck Standard VHF J-Pole Dual Band J-Pole-24. I had experimented with. 3 dB -45 dB -38. Share your thoughts. 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). Linear Loaded Sloper Antenna for 160m 43 68. Thunderpole Super Nova | CB 26-30 MHz AM/FM/SSB Mobile Antenna. It works for 2m and 70cm. I've assigned my best minions to fix it up. If you have any questions about this project, contact [email protected] Id rather thread thinner solid aluminum than to solder copper. 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. Maximum power input 75 watts. The Copper cactus antenna Copper Cactus multiband J-Pole antenna J-Pole antenna design Complete guide to build Jpole antennas with online dimensions calculator. A J-Pole antenna is a half-wave vertical fed at its base through a shorted quarter-wave stub acting as a transformer matching section. As I was setting up my amateur radio station, one requirement was for 2M and 70cm antennas in two locations. The fan dipole is usually constructed of multiple sections of wire tuned for each band required. From the book, the slim JIM was developed based on the basic J-Pole design, see Fig. Ed Fong, WB6IQN, designed this 2meter/440 dualband J-pole antenna made of 300 ohm twin-lead that fits inside this thin-walled PVC pipe. B) 12" = 30 cms. About the J-Pole. Solid Signal, connecting you to your signal solutions. Enter the desired frequency and select the desired calculation from the drop box. This antenna can handle 1KW PEP and is built, here in the United States, from rugged components and solid aluminum. 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. A Copper Pipe Jpole for Two Meters. Assembled Open Stub J-Pole. Figure 5 - Dual band J-pole with a 220 MHz copper pipe J-pole attached at the bottom. 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…”. by Al Peter, AC8GY. 7 Comments The Art of Waiting Said,. SMA Male Antenna: 2 Meter Roll-Up J-Pole Antenna, 6 FT RG-174/U coax, SMA Male connector. com The following is a description of a J-Pole antenna made from copper pipe. A previously derived theory is applied to a microstrip antenna with a reactive load to produce a dual-band radiator. The DBJ-2 was designed by Ed Fong for easy deployment in the field to aid in extended portable two-way radio coverage. Attach both RG174 cables for single fee. The proposed antenna provides a bandwidth of 403MHz (2. Figure 3—A completed eyebolt assembly These. A full-res copy is in the Photo Gallery under Antenna Mounts. 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. Have fun building it, give you a good feeling and helps build your confidence. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. Thunderpole Super Nova | CB 26-30 MHz AM/FM/SSB Mobile Antenna. A half wave radiator fed at one end presents a very high feedpoint impedance, at least several thousand ohms. An Easy Dual-Band VHF/UHF Antenna (658,950 bytes, PDF file) QST September 1994, pp. I do not know who did the original, but there are variations in several of them. I had to introduce a small copper wire into the braid for it to take the solder. 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. The fully constructed antenna is then clamped to a grounded metal pole. So dual band J-Pole arrangement is a bit tricky, and thus the strange dual stub arrangement of my old copper pipe antenna. Bandwidth: 8+ Mhz. 2-1 at 146 MHz and <1. They went together pretty easy, and then were zip-tied to a spare PA speaker stand I had laying around to get the tip of the 2m element about 15' in the air. I thought I'd had a bright idea in using copper plumbing pipe but it quickly proved to be a very well known method. So, I decided that a pair of dual-band copper pipe j-pole antennas were in my future. (Click here for larger photo ~176K) (Click here for original photo ~1MEG). php 8271 Bytes 12-02-2018 11:22:38. 1) is an omnidirectional antenna, so called because of its similarity with the letter "J". Larger diameter pipe increases bandwidth, but 1/2 inch is fine for amateur frequencies. guo, and y. Building Suggestions. It reminds me of two “Wouff Hong” (created by Hiram Percy Maxim) joined together at the base creating an awesome signal. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas. ) DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. 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. J-Poles Smoke the Competition. Maximum power input 75 watts. THANK YOU!!!!! Top Notch Ebayer. Antenna for the 220 MHz Band (1. 49" 36" Prototype was made of 1/2 inch copper pipe. Dual-band 2m/70cm. Since I had a Metal Fabrication background. Stealth 2 Meter Copper J-Pole for your HOA - AF5DN 0. This antenna is extremely popular with Fire, Rescue, ARES, RACES and Military Contractors. Then feed with ladder line, (any length) to a balun. A model consisting of a rectangular patch radiator loaded with a variable length short-circuited coaxial stub was investigated experimentally. Copper Dual-Band Super J-Pole Antenna by KA0NAN, April 1993. 99 Add to cart; 50FT Copper Antenna Wire 15-630 $ 16. Heavy duty construction out of 1/2 inch copper tubing. A 2m 70cm Dual Band J-Pole antenna for 35 USD. I actually had better results using ladder line (very cheap and available at Radio Shack) for the J-Pole construction vs. 3 dB -45 dB -38. Ferrite choke installed on cable. 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. VHF ¼ wave mobile VHF rubber duck Standard VHF J-Pole Dual Band J-Pole-24. Thus it is about 3/4 wave tall at the operating frequency. SWR should be < 1. Keith O'Brien" wrote: > Has anyone constructed a Dual Band (144/440) J Pole antenna, that they could > supply the materials and dimensions used. It works great! A good detailed, step by step construction guide would be great, with pictures and video. I actually had better results using ladder line (very cheap and available at Radio Shack) for the J-Pole construction vs. 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. Building J-Pole amateur radio antennas category is a curation of 86 web resources on , J-Pole Antenna for your Packet Radio Station, The J-pole Antenna Revisited Yet Again, The Copper Cactus J-Pole. It also won the best paper of the month award. Real-time band conditions; Latest posts Stealth 2 Meter Copper J-Pole for your HOA - AF5DN. Not practical for implementation although triband operation is achieved. antenna, I have used J pole and slim jim type antennas in the past for the same purpose with success. I was wondering if the J-pole antenna should be mounted in particular orientation to get the best usage?. 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. J-Pole Antenna: 2 M / 70cm HAM. 5 MB: Double-Ducky Direction Finder: 247. 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. A J-Pole offers about the same gain performance as a half-wave dipole. The antenna pictured here is made from one 10 piece of thick wall rigid copper pipe, one copper pipe T , one copper pipe 90 elbow, and three copper pipe caps, one SO-239 connector, and a 3 piece of 1/8 solid brass brazing rod (from a local welding supply company). 5 metres Connection S0239 Construction is Stainless Steel whips and lightweight Aluminium bracket Wieght 0. 989 875 4902 Mon. One is using KB9VBR's j-pole, one is using a home brewed copper j-pole and two are using other verticals. J-Poles don't need radials. 220 MHz J Pole Antenna-- From N6ZAV Super J-Pole Antenna (Collinear Design) - By KB0YKI. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. The Diamond did outperform the super J-pole in my tests. Two-Bands Half Sloper for 80m - 40m 42 67. 51” roll-up J-pole for 440 MHz is like MFJ-1730, but shorter. Parts Needed. Maximum power input 75 watts. Visit the original J-Pole Antenna Store. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. All worked well. Attach both RG174 cables for single fee. I've got one built just like the Arrow dual-band and it is way out there SWR wise -- a short whip on the HT works better. 00: Harvest CR 8900 (29/50/145/435mz) Quad Band Mobile Antenna $79. My main shack location has a commercial J-Pole Dual band mounted on a short mast. Mobile \ Single Band. Now I want to try 146mhz, dual band (144/440) and possibly a 6 meter. tional single band ribbon J-Pole design to dual-band operation. jpg Easy VHF-UHF Antenna. com Hawking Technology 10dBi Dual Band Omni Ant Kit [ HWK HOD10IP ] Hi-Gain Dual-Band Wi-Fi 10dBi Mimo Omni-Directional Kit (2. These are dual band antennas which are specifically designed to work in the US amateur 2 meter (144-148Mhz) and 70cm (420-450Mhz) bands, but will work on receive in other bands. 2 Meter Break-a-Way Slim Jim Antenna $34 GMRS UHF J-Pole antenna The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. 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. 2m-70cm antennas. Reduce precipitation static and lower background noise with the Tram Amateur Dual-Band Antenna. 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. Great ebayer. 00: Sirio Gain-Master Hi-Tech Fiberglass 25. Super-J Collinear-- By Gene KD4OUN 2M Quadix 4 element   -- From W1HBQ The Simplest Collinear-- From W1HBQ 2M Twin lead J-Pole By K4ABT 2M Half Square Antenna With PVC Support-- Via L. 2 Meter Slim Jim Copper Tubing Antenna by KE5FXU. There is no current flowing in/out of there if anything is connected. J-Pole A more complex, but easily built antenna is the J-Pole. 5:1 on VHF and a little more on UHF, IIRC. Q: I built the dual-band J-pole antenna from the article in the September 1994 New Ham Companion (“An Easy Dual-Band VHF/UHF Antenna,” page 61), but I just can’t get it to work. Since then I found a good technique to overcome that problem. 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. I wanted something a little more substantial, though, for when operating at my primary/secondary QTHs. So, I decided that a pair of dual-band copper pipe j-pole antennas were in my future. Reduce precipitation static and lower background noise with the Tram Amateur Dual-Band Antenna. If you have any questions about this project, contact [email protected] Build and Review - Dual Band J-Pole 144/440Mhz. Select at least ONE checkbox to filter your search! Beam \ Monoband. 440 Super J-Pole Antenna by KA0NAN, April 1996. 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!. SWR should be < 1. The basic configuration of the ribbon. #N#J-Pole_Antenna-Designer. Scanner Antennas. A copper pipe J-Pole antenna is a single band antenna that is much like a. It does not need a ground plane, radials or a complicated matching system. This value is about 2. PS: I was going to go with an aluminum than a copper. High gain Dual-band. 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. Build a Copper J-Pole antenna. If they ask I tell them its for my FM radio receiver, stealth is my middle name now. 49" 36" Prototype was made of 1/2 inch copper pipe. 00 Yaesu Original FTM-400DR/XDR 144/430MHz Dual-Band Analog/Digital Mobile Transceiver System Fusion. I took the basic design from Dale Kubichek, N6JSK web page. 144/220/440MHz Tri-Band Handheld With D-Star & APRS. I used a dual band hand held radio as a signal source and a Kenwood VHF/UHF power and SWR meter as a tuning indicator. Super Heavy-Duty, 1. UHF ¼ wave mobile UHF rubber duck Standard VHF J-Pole Dual Band J-Pole-38. 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. They went together pretty easy, and then were zip-tied to a spare PA speaker stand I had laying around to get the tip of the 2m element about 15' in the air. To visualize the antenna, one must only picture a 3 half-wavelength vertical and a 2 quarter-wavelength vertical positioned a few inches away from and centered on the the tall vertical. Enter the desired operating frequency in megahertz to get a good starting length for a dipole in both feet and meters. It certainly shows what can be done by applying a little patience. 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. SWR in the 70cm band is under 2. Works well with handheld HT radios, base stations, scanners, and repeaters. SWR should be < 1. 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. Mirrored J-pole The mirror-image J-Pole is very easy to construct and requires only two T-Fittings plus a length of copper pipe. I am no expert in antenna design but enjoy playing with different ideas. I used a dual band hand held radio as a signal source and a Kenwood VHF/UHF power and SWR meter as a tuning indicator. This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. I reproduced the metalwork exactly as described. VHF ¼ wave mobile VHF rubber duck Standard VHF J-Pole Dual Band J-Pole-24. The 'Super Nova' is a high performance CB mobile antenna from THUNDERPOLE. I have had this antenna on my roof since 1992 and it has been problem-free in the San Francisco fog. The caps are optional and are for the prevention of mud dauber nests. J-pole Antenna for Public Service Edison Fong, WB6IQN WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed measurements of a practical, easy to replicate, "roll-up" portable antenna. Super-J Collinear-- By Gene KD4OUN 2M Quadix 4 element   -- From W1HBQ The Simplest Collinear-- From W1HBQ 2M Twin lead J-Pole By K4ABT 2M Half Square Antenna With PVC Support-- Via L. Solid Signal, connecting you to your signal solutions. 4 dB higher than the average gain of a single-radiator J-pole. J-pole antenna explained. AWESOME TO DEAL WITH. Super Heavy-Duty, 1. OSJ - Model OSJ 146/440 Dual Band J-Pole. Dual Band Super J-Pole Antenna Cevan Twilley. 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. Figure 5 - Dual band J-pole with a 220 MHz copper pipe J-pole attached at the bottom. Since I like making things, a homebrew antenna was in order. Here is a J-Pole made out of 3/4" conduit pipe and a dual gang electrical junction box. 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. You will need an SO-239, Chassis mount connector, 1/16 Copper coated steel welding rod and #6 fasteners. Log Periodic Antenna Calculator Long Wire Antenna Long Wire Impedance matching Loop-Yagi's — from PA5RWE Loop Antenna, Magnetic, Portable — from G4FON Low Band Antennas. gif Plumber's Delight Copper 2m J-Pole. Super J-Pole Antenna Project - Duration: 9:12. 220 Super J-Pole Antenna by KA0NAN, May 1996. 5 GHz, is designed to be combined with the dual-band CPW-fed antenna on felt. This picture shows that the base of the antenna is mounted flush to the top of the mast. I don't take credit for the original plan designs, but wanted to share some of the tips I learned in the process. ) Solid Aluminum - End Fed (SO239 Connector Only). Benefits - Ground plane independent - Simplicity - Built in triplexer effect (3 feed lines) - Simultaneous transmission - No Bleed over between bands - Assumed gain. "Buck" Rogers Sr Practical Antenna Handbook by Joseph J. During past month. The analyzer does not measure the UHF band, but so far reports are good and the 208H is getting out with full power. After evaluating several commercial options he selected the Arrow OSJ 146/440 J-Pole antenna. Posted on March 28, 2018 October 26, 2019 by Cam - W4XXV Overall I give this antenna two thumbs up, and high recommendations for a fun project, and/or a great antenna that is easy to put up, with very little wind load, low SWR, and not too much an eye sore for the neighborhood.
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