A J-Pole Antenna for the 50Mhz (6m) Amateur band. We thought some of you may be interested in it. _____________________________________________________ Una Jpole Bibanda per i 2metri e i 70cm La Jpole è una antenna a mezz'onda alimentata ad un estremo per cui il. Almost any antenna will 'work' if it's made for 2 meters. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Homebrew 2 meter Amateur Radio Antenna from Ordina A vertical aerial for 70 cm; A J-pole. It is always a pleasure to peer into the working mind of another homebrewer and scrounger. This would make an excellent emergency 2 meter antenna for your club or home station. You are ready to fire up the your collinear! See figure 7. The other antenna is a homebrew dipole that is hanging vertical from my tower. Having recently expanded my amateur radio collection to include 6-meters, I found myself needing something more than the wire dipole antenna I originally installed. Please allow. This link is listed in our web site directory since Tuesday Jul 5 2016, and till today "Home Brew J-Pole Antenna Project" has been. It also makes an excellent scanner receive-only antenna for the VHF bands. That calculates overall to around 7. Building J-Pole amateur radio antennas is a curation of 85 resources about , J Pole antenna for 6 meters, Concealed DSS J-Pole, The Copper Cactus J-Pole, J-Pole Antenna for your Packet Radio Station, The J-pole Antenna Revisited Yet Again. Home • Products • Technical Info • Sample Photos. The Frequency Devices Half Wave Center Fed Dipole antenna with Balun is tuned to 50 MHz (6 Meters). I settled on a 2 meter vertical dipole. J Pole EZNEC model. Here it is set up in the garden for testing on 145. Linearly Loaded Tee Antenna 17 27. In this article you will find a basic drawing of a J Pole antenna and the lengths, spacings, and other details to build one for the 17, 15, 12, or 10 meter bands. M2 Antennas. About SWR; My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. pvc j-pole 2 meter antenna. The performance of this attenuator over the HF frequency band is not as good as the 'copper' attenuator (results shown in the previous blog). I have a 10/15/20 meter trapped antenna horizontally polarized that was originally used as the driven element of a three element antenna. SWR 430-440 MHz <1,6. This month I decided to build a 2 meter 5/4 wave antenna. (Half Size) Ham Radio Antenna: This project gives instruction on how to build my version of the G5RV wire antenna that is used on the 10-40 Meter Ham Radio bands (28MHZ to 7MHZ). Low Noise design, Wideband operation, Equally good for EME, Terrestrial or FM Repeater work. If you can't find coat hangers or a tomato cage, you can use an old grill, thick copper wire (6-12 AWG), welding rods, or some form of metal tubing, perhaps from an old TV antenna. The J Pole antenna is a simple antenna to build for most builders and requires little skill or tools to make it work properly. I settled on a 2 meter vertical dipole. J Pole antenna for 6 meters - Homebrewed jpole antenna for 50 mhz by IW0BZD, include pictures and schematics, in italian. Six Meter Home Brew Dipole Antenna. With a length of 11 meters or more additional guy wire could be used. Performance is equal to a J-pole, but it’s smaller, less obtrusive and more. Michael knew this and decided to give it a try. It was a collinear dual band J Pole that would cover 2 meters and 440mhz. for 1/2 inch copper pipe J-Pole antennas. There are three possible conditions, they are:. (Collinear Design) A calculator for deriving the lengths of tubing to be used for the construction of a Super J-Pole Antenna. Topic: Dual Band J-Pole Antenna Summary: Edison will talk about his design of dual-band J-pole antennas for the 2-meter and 70-cm bands. The DBJ-1 is sheathed in a PVC tube, while. Discover (and save!) your own Pins on Pinterest. outdoor uhf antenna digital. The primary problem is that PVC tubing has a significant velocity factor which causes RF to slow down. 6 Meter Aluminum Dipole Antenna Parts list: The 6 meter dipole uses the same parts as the 10 meter model, less the 6-foot length of. Known as the Magic Band, the six meter band can be mysterious, unpredictable, and downright fun. Here is how I managed to get pretty decent results with a homemade 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. The 6 meter Moxon is built from 5/ 8 inch OD and 1/ 2 inch OD aluminum tubing with 3/ 8 inch OD solid aluminum for the corners. Pityu was able to use some copper tubing, a steel wire from an old CB antenna, and a homemade coil to make this efficient and simple 2 meter antenna. But be aware that such a wire antenna will have a fairly restricted bandwidth due to the small diameter of the conductors. I've heard Tim (HLR) and others talking about it, so this morning just before work I fired up the Flex 1500 (5 watts outpoot) and using a 220 Ft long flat top at 90 Ft, I was able to work 2 Italian stations, the Ukraine, and Germany through modest pileups. com and etc. Thanks to Pityu Nagy for this fascinating video on how to make a 5/8 J-pole antenna for 145 MHz. 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. 00 : Alpha Antenna, Civilianized and Militarized HF antenna systems for Portable, Base, Mobile, Manpack More information Find this Pin and more on Ham radio by Bill Hobbs. 2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. You never quite know when the band will open and where it will take you. Attention: The mounting in a plastic pipe or with tape on a fishing rod will detune the antenna to lower frequencies and needs a little bit of correction!. I have a combination 2 meter and 70 cm 'J'-pole and can't tell any differences between it an just a plain 2 meter 'J'-pole. I understand that everyone else in the world uses Metric, You can convert these … Continue reading "Open Stub J-Pole Project – Completed (Many times)". My current 2 meter antenna is a homebrew copper pipe J-pole whose extended base sits inside an aluminum pole mounted to the side of the house. 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. CA Militia Tri Band 70CM / 2M / 6M Rotator Cable Antenna Portable Homebrew DIY Cheap Ham Radio - Duration. Example antenna for 20-17-15-12-10 meter (High HF + WARC). Please allow. The first one of MFJ-1724B Magnet Mount Mobile antenna burned-out the capacitor in the. Homebrew Coaxial Dipole for VHF or. Homebrew HF Vertical Antenna. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. 5 or lower across the 2 meter and 70cm band. A combination of antenna designs, namely the J‐Pole and Zepp along with Alpha Antenna’s matching network technologies, are utilized to achieve a fairly resonant antenna design that can be tuned on 6, 10, 12, 15, 17, 20, 40, 60, 80, & 160 Meters. The text explains how to adjust it for minimum SWR. Earlier this year the 6 meter J-pole to which that beacon was connected seemed to have failed, exhibiting a high VSWR (around 5:1) and signals were down by 1-2. The antenna itself is 3. I use hose clamps to attach my 2m J-pole to the top of it, along with a carabiner clip, which I run a piece. I have a combination 2 meter and 70 cm 'J'-pole and can't tell any differences between it an just a plain 2 meter 'J'-pole. That calculates overall to around 7. If all this sounds like too much work, this antenna can be bought for a very reasonable price from Allen at Arrow Antenna. By ON4CFC Via Antennex; Super J-Pole Antenna (Collinear Design) - By KB0YKI. No damage at all, and it kept right on ticking. 23-26 Step-by-step tutorial on constructing dipoles for any one of the HF bands from 1. I would have opted for a 6/2 meter antenna of some kind except the tubung is grounded at the base. Wire versions are usually the answer. 9” 5/8ʎon 2 meters is 50” and impedance matching is provided by a low inductance coil The above combination provides a base-loaded vertical antenna that works on 6 meters. He is credited with original article in QST magazine. Introduction. The only drawback to this antenna is the cost of copper pipe used for the antenna sections. The crowded space above the set required a compact multi-band dipole, and the CHV-5X was selected to solve the problem the minimal space presented. 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. The unique design characteristics of this 10-160 Meter HF JPole antenna enables it to approach resonance on the major HF bands (10/12/15/17/20/40/80 Meters), all of which presents an SWR that is low enough for external tuners to achieve a near perfect match, including 160 meters. Homebrew 40/80 Trap Dipole Design This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. I understand that everyone else in the world uses Metric, You can convert these … Continue reading "Open Stub J-Pole Project - Completed (Many times)". Bailey Line Road 77,656 views. Currently I have 20 feet with the military mast plus 18 feet with the crappie pole for 38 foot at the tip. Origination of J-pole and Zepp Antennas. For instance, the J-Pole antenna design for 2m/440 ops is a very popular homebrew project, and it can be created with simple aluminum from the hardware store or even from segments of twin lead feed line. This won’t actually result in an antenna system that covers all of the ham bands, but it can be a good start. 40 meters on a 80 meter di-pole!), so you may want to double check that before using a balun. SWR on 440 will not change much but the performance will. I have never once built a home-brew aluminum antenna. N6BT has done repeated tests that show that a flat-top dipole mounted at the same height as the apex of an. building an radio control antenna. b w travel antenna. I read the article: Six Meters from Your Easy Chair by Dick Stroud, W9SR in the January, 2002 QST with some interest. Wire length in Collinear J-Pole Phasing Coil. The “boundaries” can be clearly seen. In free space the center-fed half-wave antenna has an input impedance that is a close match to 50 ohm coax and to most radios that have a 50 ohm output impedance. Fortunately, there is an easy solution. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. Specifications: Overall Length: 4 feet, 50 ohm feed impedance, no ground radials. Wideband Dipole Antenna 15 23. This won’t actually result in an antenna system that covers all of the ham bands, but it can be a good start. Super J-Pole Antenna This antenna was developed by the Independent Repeater Association in Des Moines, Iowa, for use on its many repeaters, nodes, and BBS. This is a 18ft 80/40 meter Antenna that is Brand New in the Box. Wire length in Collinear J-Pole Phasing Coil. Here are some unique benefits of the J-Pole antenna and the Slim Jim. For 15m we have tried several types of vertical antennas, the last 2 years we used a J-pole antenna. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials. Homebrew Hex Wire Beam Antenna I put together a homebrew wire beam based on the "hex" style. Tuning was easier than the Slim Jim and coiling up the radiating element takes no effort. I have a combination 2 meter and 70 cm 'J'-pole and can't tell any differences between it an just a plain 2 meter 'J'-pole. A $20 HF Mobile Antenna (109,255 bytes, PDF file) QST April 2000, pp. Attention: The mounting in a plastic pipe or with tape on a fishing rod will detune the antenna to lower frequencies and needs a little bit of correction!. DELTA LOOP 50 MHz,50MHz J-Pole,6m Vertical Antenna,SIX METER, 5/8,YAGI 3 ELEMENTI PER 50 Mhz,Slim Jim för 6 mt. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Homebrew 2 meter Amateur Radio Antenna from Ordina A vertical aerial for 70 cm; A J-pole aerial for 50MHz; 2M J Pole antenna; Two & Six Meter Beam antenna; New Carolina Windom Antenna; The Double Bazooka Dipole; A Two-Band Fan Dipole; 6 M Base station Di-pole antenna; A. We lowered the gin-pole and began assembly of the mast that supports the 2-meter J-Pole, the 70 cm ground plane and the 80-40-30 trap dipole. The original sleeved dipole project idea is from Harold Melton KV5R. Alternative Method. antenna booster. 6 Band hexagonal beam antenna covering 6, 10, 12, 15, 17, and 20 meter bands shipped to your door for only $570($520 + $50 shipping) The NA4RR Hexagonal Beam (commonly referred to as the hex beam) is a popular antenna based on the G3TXQ design. Bailey Line Road 77,656 views. I really enjoy hitting the woods and hiking to a high spot, run up a roll up j-pole and make some contacts on 2-meters. There are times when you may need more gain than the standard J-Pole antenna. Amateur Radio Homebrew Projects on the Net This page is dedicated to Amateur Radio Homebrew. 100 Mhz 147. Building an amateur radio antenna for 160 meters is a challenge. I placed the Drake downconverter at the back end of the remaining on-axis pole, as a bit of a counter weight. Right Angle Marconi Antenna 17 26. This antenna is also known as the “copper cactus” (because it kind of looks like one of course!). The correct lengths for the various models will be displayed in the chart. Alpha Antenna 6-80 meter J-Pole Jr 34 foot end fed HF antenna [6-80_HF_JPole_Jr_34 foot] - 6-80 METER 34' END-FED ANTENNA The Alpha J-Pole Jr Antenna is only 34 feet in length. It isn't quite enough, but it helps. Simple antennas with superior performance 6 Meter J-Pole Amateur. built for quick assembly in the field or up mountains. J pole cb antenna design found at hamuniverse. The popular Buddipole Antenna system can be used as an indoor stealth antenna with a few minor adjustments. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. The driven element is way too close to the tubing for it to be an effective 2-element beam. I really enjoy hitting the woods and hiking to a high spot, run up a roll up j-pole and make some contacts on 2-meters. J Pole Lets start with this: The J-pole is actually might be a bit deceiving. Discover (and save!) your own Pins on Pinterest. Conditions are expected to improve in the near future as Solar Cycle 24 progresses, so it seems a good time to add a 6 meter antenna. Master machinest Don Nichols, KV4PH talks about how he built a 10 meter J-Pole antenna. J Pole antenna for 6 meters - Homebrewed jpole antenna for 50 mhz by IW0BZD, include pictures and schematics, in italian. I settled on a 2 meter vertical dipole. 5/8-WAVE COLINEAR "OUTSIDE PVC" 2-METER 146 MHz FM J-POLE Via KB1DIG & KB1GTR 6dB COLINEAR VHF ANTENNA -- From Harry Lythall - SM0VPO BiQuad For 2m/440 - FROM KE4UYP Building A 2-meter J-Pole Antenna By Jaden Cheap Yagi Antennas for VHF/UHF -- From Kent WA5VJB The Simplest Collinear -- From Ross W1HBQ Cycloid Collinear, a CP Omni for 2M from. "Homebrew" 435MHz 12-turn Helix Antenna by Antennen who make and sell antennas for good out to be a great little antenna. The antenna is sturdy, portable, and will give you modest gain on this popular band. home made collinear antenna. does resonate at UHF. 20m Indoor Antenna. At the top of the line, I soldered a 66 foot, 4 inch wire to each side of the ladder line. I have some aluminum stock lying around. Yesterday morning around 8:00 local time, I heard during my breakfast signals from the beacon I0JX/B on 6 meters. Now was as good a time as any to make this antenna the. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. You will note that the spacing between the vertical wires is 20 inches for 15 and 10 meters, but 40 inches for 20 meters. SWR should be < 1. My old one is still mounted on my parent’s house and in good shape after several years of exposure to the elements. Now was as good a time as any to make this antenna the. This antenna is also known as the "copper cactus" (because it kind of looks like one of course!). Discover (and save) your own Pins on Pinterest. A Super J-Pole Antenna for the 70Mhz (4m) Amateur band. 3: 400 watts PEP 130 watts FM: 2. Low Noise design, Wideband operation, Equally good for EME, Terrestrial or FM Repeater work. 40 meters on a 80 meter di-pole!), so you may want to double check that before using a balun. High Performance 40 Meters Vertical. Six Meter Wire Antenna Sizes. I just tapped the half wave and the stub starting at the tip of the crappie pole. In 2 years I worked 38 states and 6 or 7 foreign countries on six. The resource is currently listed in dxzone. Steve, Just to let you know HOW good 10 meters is. Discover (and save!) your own Pins on Pinterest. Old-timers. The Wire Size can range from 16 AWG to 12 AWG. 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 Northern Virginia team of Ham Radio operators and companion hikers manned Hawksbill Mountain for the 2011 Appalachian Trail Golden Packet event. Second was to be able to use some of the local 6 meter repeaters and third was to be able to use single side band when the band opens. Building And Tuning 2 Meter 144 Mhz Copper J Pole A bobtail gain antenna for 432 MHz. My name is Michael, KB9VBR, and I carry a full line of VHF and UHF antennas for sale. And I prefer something omnidirectional. Building the 6 Meter Moxon Antenna As the late spring and summer months heat up, six meters comes alive. Now you've probably heard of a beam antenna, and maybe you've heard of a J-Pole. The text explains how to adjust it for minimum SWR. Building the 6 Meter Moxon Antenna. The ARRL Antenna Book. Super J-Pole Antenna This antenna was developed by the Independent Repeater Association in Des Moines, Iowa, for use on its many repeaters, nodes, and BBS. For instance, the J-Pole antenna design for 2m/440 ops is a very popular homebrew project, and it can be created with simple aluminum from the hardware store or even from segments of twin lead feed line. The next IRTS contest is the 40m Counties which will be held on Sunday the 14th of October 2018 at 12:00 UTC (1pm Irish Summer Time). Due to material, I decided on a 5 element Yagi built for VHF since all I would have to buy is more 3/8″ round stock. 6 m Antenna Inspiration - It's nice to see that. Demonstration showing how to set up the buddipole deluxe edition into a 2 meter J-pole antenna. A Copper Tube J-pole by Ed Humphries - N5RCK [email protected] Discover (and save) your own Pins on Pinterest. 6 meter loop antenna plans keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. The 2m/440 Super J-Pole. I already knew that I could reach a number of repeaters in the area with my roll-up J-pole. For years there have been many home brew projects to construct similar antennas but no high quality versions have been commercially available until now. Trying out my new homebrew copper jpole. 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. This horizontal “slot” antenna, cut into the reflector of a TV dish, is both the master of disguise and high in performance. For a 2 meter f = 146 MHz J-Pole antenna, the 1/2 wavelength radiating section (Section A) is equal to A = 0. 5 dbi cell antenna. EH Antenna for 40 and 20 meters; Homebrew G5RV; 40 meter mini Moxon Antenna; EH Antenna for 10 meter; Quad and ModQuad Antenna; Inverted U antenna for 160 meters; 6 Band HF Windom antenna; The Bazooka Antenna; Antennas for HF mobile operation; Inverted L Antenna for Low Bands; Your first dipole; Remote control Antenna Switch; The gin pole. The performance of this attenuator over the HF frequency band is not as good as the 'copper' attenuator (results shown in the previous blog). The main category is J Pole antenna plans that is about Building J-Pole amateur radio antennas. Homebrew HF Vertical Antenna. From a electrical point of view it is a halve wave antenna, but mechanical it’s a ¾ wave antenna. This Website by Warren County Amateur Radio Association is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3. (Collinear Design) A calculator for deriving the lengths of tubing to be used for the construction of a Super J-Pole Antenna. This antenna is also known as the “copper cactus” (because it kind of looks like one of course!). 4) As many as 50 stations can operate in a 3 or 4 kHz passband with little interference, even when signal strengths differ by as much as 60 dB. Many commercial HF antennas use this technique to achieve good patterns on their multi-band antennas. self supporting antenna towers for sale. Antenna is made from RG58U coax cable and, 16 feet of RG58 lead-in coax cable. J Pole Lets start with this: The J-pole is actually might be a bit deceiving. I used my FT-891, with a homebrew ammo can battery box (12v 18Ah), and a 20m LNR Precision endfed. Example antenna for 20-17-15-12-10 meter (High HF + WARC). Effectively, the antenna is an end fed dipole. The one in the back is the fan dipole (10m and 20m) and the inverted is the 15 meter band dipole. In this video from "drez20001", we get a complete tutorial on how to design, build, and use a J Pole Antenna for the popular 2 Meter amateur radio band. My first 2m antenna was a homemade J-pole and then the extended J-pole came shortly after. Efficient 2 meter Disguise Antenna. By John Portune W6NBC. Discover ideas about Antenna Tv. This is about 1 full wavelength of wire. That calculates overall to around 7. Portable Amateur Radio Satellite Antenna. The size of the antenna makes a Half wave length on 80 meters, and with the traps a half wave on 40m with a SWR (standing wave ratio) of 1:1-1. Par Electronics SM-50 6-Meter Strossed Moxon Antenna The "C Pole"-A Ground Independent Vertical Antenna. In this video, we see how to configure the Buddipole Antenna as a 2 meter J-Pole. Currently I have 20 feet with the military mast plus 18 feet with the crappie pole for 38 foot at the tip. 6 Band hexagonal beam antenna covering 6, 10, 12, 15, 17, and 20 meter bands shipped to your door for only $570($520 + $50 shipping) The NA4RR Hexagonal Beam (commonly referred to as the hex beam) is a popular antenna based on the G3TXQ design. The one in the back is the fan dipole (10m and 20m) and the inverted is the 15 meter band dipole. The above radiation plots were produced using MMANA Antenna Analyser software by JE3HHT, Makoto (Mako) Mori. On hf the size and element diameters are usually a drawback. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, Wayne. I decided to price out the aluminum for a home brew portable HF antenna. J Pole calculator - Just enter the frequency and get the measurements you need. NOTE: This antenna is a non-stock item, it is built and assembled when ordered. Now it's time to step it up (just a little bit) and fabricate a bigger antenna. Antenna Bag Antenna Bag for some models - Roll up Bag & 30 inch & 40 inch plain bags. Discover (and save!) your own Pins on Pinterest. The Squalo antenna was sitting atop an 18' painter's pole in a Radio Shack tripod just off my patio. 125MHz as the center frequency which is in the SSB portion of the 6 meter band. From a electrical point of view it is a halve wave antenna, but mechanical it's a ¾ wave antenna. Alpha Antenna 6-80 meter J-Pole Jr 34 foot end fed HF antenna [6-80_HF_JPole_Jr_34 foot] - 6-80 METER 34' END-FED ANTENNA The Alpha J-Pole Jr Antenna is only 34 feet in length. This is the perfect antenna for a 6 meter repeater project or high performance base station installations. com Simply the Best (307) 222-4712 Open Stub J-Pole We don’t invent antennas. 2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. This Pin was discovered by Bruce Parshall. I decided to use a vertical antenna on 10 meters because I had a Radio Shack 102-inch stainless-steel whip (#21-903, $15) just looking for an application! Construction The construction is very simple and took. I get superb aircraft reception but a very weak signal from my local airport 20 miles away. This is because I wanted to squeeze the antenna into available space. In free space the center-fed half-wave antenna has an input impedance that is a close match to 50 ohm coax and to most radios that have a 50 ohm output impedance. The J Pole antenna is a simple antenna to build for most builders and requires little skill or tools to make it work properly. In DK7ZB’s plans. There are several features which make the ubiquitous Twinlead J-Pole antenna a good addition to your emergency grab-n-go kit. AF6SA has designed a fairly compact and lightweight antenna package that can be built with simple tools, some copper pipe, and a few PVC sections. Aug 7, 2019- Explore centerfirenotw's board "homebrew antennas" on Pinterest. Have you ever wanted to play 6 meters ? Try one of these antenna projects for six meters. 6 Band hexagonal beam antenna covering 6, 10, 12, 15, 17, and 20 meter bands shipped to your door for only $570($520 + $50 shipping) The NA4RR Hexagonal Beam (commonly referred to as the hex beam) is a popular antenna based on the G3TXQ design. Efficient 2 meter Disguise Antenna. antenna pointing directions. rtc May 7, 2018 at 7:35 am. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Homebrew 2 meter Amateur Radio Antenna from Ordina A vertical aerial for 70 cm; A J-pole. The antenna was supported by a 31’ Jackite pole mounted to a hitch support on the back of my vehicle, and then sloped down towards to the picnic table. 7 dBi gain and 18° Vertical Beamwidth. 5 dbi cell antenna. On the website, I have provided a number of J-Pole plans as well as links to J-Pole websites. A J pole is simply a half wave radiator, end fed with a 1/4 wavelength stub to match the very high impedance to 50 ohm coax. The J Pole is the antenna I liked best out of the three. by Al Peter, AC8GY. Antenna is at 15ft over ground. It is always a pleasure to peer into the working mind of another homebrewer and scrounger. A Super J-Pole Antenna for the 70Mhz (4m) Amateur band. antenna was mounted on top of a wooden utility pole, under a two element 40 meter Yagi (see Figures 2 and 3). com in a single category. Many think the wire length in the coil should be exactly 1/2 wave long. Look at most relevant J pole cb antenna design websites out of 426 Thousand at KeyOptimize. 2 meter home built collinear antenna. Contact one of your local Diamond ® Dealers for current price & availability. Hidden Antenna Ideas Loops, Operation Away From Home, Attic-- From N0HC Stealth Antenna Experiences - From Clif's ham radio connection. 2 METER LADDER LINE J POLE PROJECT- BUILD IT FOR A SONG! Here is an easy to make home brew antenna that can get you on the air working satellites or be built for. This is a simple but sensitive Home Made J-Pole Antenna that works great when You are limited as to a place to mount an external antenna ! What You Will need: 1( 48 1/4 " twin lead wire 2( Measuring tape 3( Exacto knife or similar cutting tool 4( electrical tape 5( short lenght of coax cable 6( antenna connector for scanner. Are you looking for a UHF omni antenna with a little more gain? Our UHF Slim Jim Antenna delivers up to 6dbi of gain on the 440 - 470 Mhz UHF bands, which is almost twice the gain. All coax 6 Meter 52Mhz J Pole antenna with 16ft. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. The Buddipole™ - HFportable dipole antenna system, Welcome to the home of the Buddipole™, an hf/vhf portable dipole antenna system which is designed to be modular, versatile, and efficient. The text explains how to adjust it for minimum SWR. 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. This would be for mounting at home, not mobile or portable. Any ideas? My homebrew 2-meter j-pole (made from 450-ohm ladderline) is also resonant on its 3rd harmonic, 70cm, and has reasonably low swr on both bands. I use a J Pole for air band (122 MHz). The history and basic theory of this antenna dates back to 1946. Slim Jim; J Pole. The idea may work well for 2 to 6 meters and higher however. 50MHz antennas plans, homemade antennas for the six meters is a curation of 162 resources about , J-Pole Antenna for your Packet Radio Station, J Pole antenna for 6 meters, The M2 6M7JHV Antenna, Comparison of Commercial 6m Antennas, 50 MHz Coax Dipole. ) First, a 2 meter antenna 1Notes appear on page 40. I just tapped the half wave and the stub starting at the tip of the crappie pole. 5 dbi cell antenna. Pole -RM BASE ANTENNA HOMEBREW. High Performance 40 Meters Vertical. collinear antenna 450 mhz schematic. FREE Shipping on orders over $25 shipped by Amazon. 2-1 at 146 MHz and <1. I get superb aircraft reception but a very weak signal from my local airport 20 miles away. A Super J-Pole Antenna for the 70Mhz (4m) Amateur band. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials. Antenna is at 15ft over ground. By Mike Higgins, K6AER. When rolled up, it is an extremely compact, pocket-sized antenna. Check the be. It also won the best paper of the month award. This Pin was discovered by Jack Heidt. com - Find and search your favorite wallpapers and download in the best possible quality for free. Attention: The mounting in a plastic pipe or with tape on a fishing rod will detune the antenna to lower frequencies and needs a little bit of correction!. Without Radials. Homebrew 40/80 Trap Dipole Design This Antenna design was one that I used about 4 years ago, it worked exceptionally well on 80m and 40m. Alpha Antenna 6-80 meter J-Pole Jr 34 foot end fed HF antenna [6-80_HF_JPole_Jr_34 foot] - 6-80 METER 34' END-FED ANTENNA The Alpha J-Pole Jr Antenna is only 34 feet in length. I need to know if simply making a 1/4 wave section using the 300 ohm twin lead, connecting it to the 1/2 wave section above it, and then simply tuning it by finding a resonant point near the bottom of the "J" section is all I need to do. For years there have been many home brew projects to construct similar antennas but no high quality versions have been commercially available until now. Discover (and save!) your own Pins on Pinterest. It is made from 10' of 1/2" copper tubing, a couple of fittings, a coax connector, and a piece of 14 gauge copper wire. The ‘J-Pole’ Antenna consists of a half wave vertical radiator and an adjacent quarter wave tuning stub which forms the classic ‘J Shape’. That should be an interesting project. While still using copper pipe, you. Being a pilot and mechanic, at some point I would like to have either a hangar at a local airport or a small strip at home to work on restorations, so it would make sense to have an AvBand radio in the shop. Hams are (were) always trying new "stuff" it is more old school home brew ham rather than new buy it out of the box. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. We simply build them better. Got it in the air and on the air in time for a local 6 meter net. Copper cactus J-Pole - part 1 For some time I've been wanting to get a decent antenna up for 2 meters. Another antenna project completed today is the 2 meter twin-lead J-Pole. Create a Slim Jim antenna. 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.