J Pole Antenna Diy

The 2-Meter 300 Ohm TV Twin-lead Roll-up J-pole. Using what is called "Plumber's Delight" construction I soldered all joints using a propane torch, lead-free/non acid core solder, and some soldering flux. Here a collection of links to make you own dual band VHF UHF copper cactus antenna. Total cost for this antenna is under $10 (excluding coax) and it can be built in about an hour. The plastic connectors keep the antenna insulated from the mast while giving it support in three places. This system was designed for use as a stationary antenna. A used, outdoor umbrella stand can act as a base to support the mast. The proceeds of these antennas go to support my group at UC Santa Cruz -Santa Clara Valley. Ready to increase your range? Get a J-Pole up high and find out how far you can transmit. KB9VBR J Pole Antenna Intial Testing - Duration: DIY VHF 2M Jpole antenna out of 450ohm line - Duration:. Shop our selection of long-range base station CB antennas from Solarcon, Maco and Firestik. Copper Cactus Dual-Band Super J-Pole Antenna Project. The airband J-Pole antenna is tuned for the 118 – 128 MHz aircraft aviation band. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. See the eham reviews at this link. of a J-Pole, with the 5/8 wave section dangling downward. pattern (black) and the same antenna on 70cm (red). Look online for a J-Pole calculator, there are several good ones. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. Here is a picture of the antenna mounted on the new mast. The 2 Meter Collinear J Pole Antenna Projectby Sean M3FVB Get ready for field day, mountain topping, emergency communications, roaming or just plane ham radio fun with this portable inexpensive 2 meter J designed to fit into a small foldup space that yields about 8db gain. This was modified into the J-pole configuration by at least 1936 with continuing refinements by 1943 and became popular with amateur radio operators because it is effective and relatively simple to build. A Super J-Pole Antenna for the 70Mhz (4m) Amateur band. Amazon's Choice for 30 foot antenna pole 6-24 Foot Telescopic Extension Pole - Multi Functional Pole, Paint Roller, Light Bulb Changer, Duster Pole, Antenna Pole, Hanging Lights, Window and Gutter Cleaning - Includes Free Feather Duster. As simple as it is, the J-Pole performs very well. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. Parts used found @ home depot, build time 1 hour k0bet, jpole, j-pole, super jpole, home brew jpole, diy jpole,. It will reflect the signals coming from the front and from the bowties which should result in close to double the signal strength. Build it! If you have an SWR meter you're well ahead of most. DIY VHF J Pole Antenna. This is a very simple antenna to build. The Copper Cactus J pole antenna design is a simple amateur radio antenna model that will allow you to operate both bands. This sketch shows a semi-exploded view of the antenna. BNC Male Antenna: 2 Meter Roll-Up J-Pole Antenna, 6 FT RG-174/U coax, BNC connector. Hence the switch to the J-Pole. Look online for a J-Pole calculator, there are several good ones. It basically involves building a “roll-up” type two meter “J Pole” using 300 ohm TV twin lead and then inserting it into a length of 1/2 inch PVC tubing. We recently spotted a nicely constructed J Pole antenna for the FM broadcast band while perusing eBay. The airband J-Pole antenna is tuned for the 118 - 128 MHz aircraft aviation band. 2M Aluminum Slim Jim Antenna. BUX BALUNs are used to connect balanced antennas to unbalanced transmission lines, such as coax cable. Build it! If you have an SWR meter you're well ahead of most. A J-Pole offers about the same gain performance as a half-wave dipole. Get to know Power-Pole anchors first-hand. No endorsement may be inferred from the mere listing of a URL or link. recommends the following additional step:. The 6 meter J-Pole is The 6 meter J-Pole features a two piece design for shipping and easy storage. • The antenna must be durable and secure. I went to the local lumberyard and hardware store (a home building supply will work, as well) A Backpacker's Delight— The Folding J-Pole A new twist on the old J-pole. Building a Simple J-Pole from 3/4" EMT Conduit. J-ames Pole Antennas' can custom make a J-Pole antenna to your specifications. The EMT will be welded to the flat bar on the U-bolt that attaches to the antenna mast. Build it! If you have an SWR meter you’re well ahead of most. I've built them for 10 meters and it is a great Field Day or camping antenna because a rock, a string, and a handy tree limb is all it takes to hoist it. The plans are readily available online from a number of sources. Also, if you plan on using any kind of mobile or base station in your home, you will definitely need to use some kind of an external antenna. 1 dbi, depending on who you wish to listen to. From the maker's listing:. allowed to flow on the outside of the coax shield and reduce the J-pole’s performance. a bargeboard mount) with screws 75 Ohm shielded coaxial cable 6 bolts (very small, small and larger). Wonder Pole® High Pole for pilot cars and over-sized truck loads. I am interested in the J Pole as much for the craft and do it yourself aspect as much as anything. ost commercial 2-meter repeater antennas with gain fall into two categories:. A used, outdoor umbrella stand can act as a base to support the mast. Kronberg | May/June. J-poles for 11m are BIG I helped a local ham build a 10m J-pole and they work good. Although twin lead, (a 300-ohm transmission line used on TV and FM antennas in the 50s to the 70s), is not available at most stores, you still find it around and it's a cheap and efficient way to make an efficient antenna. "Buck" Rogers Sr Practical Antenna Handbook by Joseph J. Custom made 2M Band 146-148mhz 4 element Quad Antenna for Ham Radio which was never used. The unique design of our universal J Mount allows you to get your TV antenna higher than standard 18 in. A 2 meter J pole antenna, constructed of 1/2″ copper tubing, is easy and cheap to make and almost guarantees practical success. 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. YOURSELF ! Note: I don’t know the originator of this clever adaptation so I cannot provide any acknowledgement. A very tall tower built from scratch can cost many tens of thousands of dollars and cause many zoning delays. This is a 3/4 wavelength J-pole optimized using JSC 1220 custom twinlead. An additional antenna is typically required to TX on the 144 Mhz band (typically the uplink frequency). The J-pole antenna needs no grounding and has a high angle of signal radiation. com 2 Meter Twin Lead J-pole Antenna. J-Pole antenna for this station, I used a stan- dard 1/4-wave ground plane vertical antenna. It works very well as a multiband antenna indoors. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub. Free shipping Base Ham Amateur Radio Antenna Copper J-Pole FREE. Offer is good for web orders only. It took about 2 hours to finish. The dimensions vary somewhat from build to build depending on velocity factor of the parts. 223-MHz antenna gets you going on 11/ 4 meters in a hurry. The Q of a antenna determines it's bandwidth. The DBJ-1: A VHF-UHF Dual-Band J-Pole - Bay-Net The 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 feed line for less than $10. "Summits On The Air" with W7MRC, Amateur Radio, Rhodesian Ridgebacks, Old 4 Wheel Drivers, Mountain Bikes, Hiking and "Just Getting There". (Note: It is always good practice to use an Antenna Analyzer when building a custom antenna!). We are proud to offer them a somewhat lower price. had shortcomings. 100 WI9WIN UHF Repeater 50 Miles away in Rice Lake Wisconsin. 2m Copper J Pole antenna. It operates as an end-fed half-wave antenna. Po Windom radio Ham antenna. It basically involves building a "roll-up" type two meter "J Pole" using 300 ohm TV twin lead and then inserting it into a length of 1/2 inch PVC tubing. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. You can also build a roll up J-Pole out of ladder line when you go portable. W6SI Blog Page (Entry 8) 4/11/2017 : V/UHF Dual Band J-Pole Antenna. Installing Your Ham Radio In Your Vehicle, Tips And Tricks For Mobile. J-Pole Antenna Length Calculator; Stealth Outdoor Ham Radio Antenna; Sound Card Packet TNC; Random Password Generator; Web Hex Color Codes; Pantone Color Codes; Portable Roll-Up J-Pole Antenna Deployment and Usage Tips; Blog; Contact. J-Pole antenna is an end-fed omnidirectional antenna that should be fed with 50-ohm impedance balanced line. J-ames Pole Antennas' can custom make a J-Pole antenna to your specifications. I went to the local lumberyard and hardware store (a home building supply will work, as well) A Backpacker's Delight— The Folding J-Pole A new twist on the old J-pole. 2-1 from 440 - 450 MHz. 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. The perfect project for the new HAM radio operator who wants to extend the range of their hand-held UHF/VHF radio with a portable roll-up antenna. Ordering Information - At this time we offer 7 antenna models. 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. I started with calculations available online for the frequency I wanted to target, in my case 462mhz. It is totally UV protected and should last easily 10 years on a repeater mountain top. The 2m/440 Super J-Pole. BNC Male Antenna: 2 Meter Roll-Up J-Pole Antenna, 6 FT RG-174/U coax, BNC connector. Once in position I will drill and secure each tee with a SS screw. J-poles for 11m are BIG I helped a local ham build a 10m J-pole and they work good. "FIX" ANTENNA TO MAST 2 INCH HOSE CLAMPY "U" BOLTS MAY CRIMP COPPER PIPE HOSE CLAMPS SECURE WELL IN MY NOTE: The radiating element of this antenna must be clear of nearby metal objects by at least inchey If side mounted on an use 6 foot side mount Top of antenna may requÑe: ulated supp ott at high (wind, ice) elevationy 1/2 INCH COPPER. com ARRL VHF/UHF Antenna Classics ARRL Vol. This is an excellent opportunity for the members of SARC to build a quality J pole antenna at a minimum cost and I am sure you will want to take advantage of this offer. I give this pole a lot of credit I am able to get great distance and range on the 2 meter band. com FREE DELIVERY possible on eligible purchases. 2m/70cm Dual Band J-Pole by KK4ICE. Thomas Valentine: swr does not an antenna make it effective radiated power that you want! i know a lot of people will say swr the lower the better but look at it this way a 50ohm dummy load will show a perfect match but wont radiate worth a darn. 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. Over on our store we've recently released our new receive only dipole antenna kit which now replaces the older magnetic whip style antennas from the previous kit. Super J-Pole Antenna Project Ham Radio Crash Course. Cantennas are typically used to increase the range (or discovery) of Wi-Fi networks. Here is a J-Pole made out of 3/4" conduit pipe and a dual gang electrical junction box. Local one stop shop in Toowoomba&Darling Downs for your J Pole Antenna Mounting Pole needs. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. New Dual-band Antenna for the HT. 2 Meter J-Pole Antenna This is perhaps the cheapest gain antenna for 2 meters that can be built. We also make break down models that are easier for transportation, back packing and/or emergency services. +++++ A RECENT FIELD TEST OF THIS ANTENNA COMPARED TO A BASE STATION ANTENNA A recent field test (March 26, 2005) pitted the "W2IK J-Pole" antenna's field strength vs. Cheap Yagi Antennas for VHF/UHF by Kent Britain, WA5VJB edited by John Maca, AB5SS [Editors notes: The antennas described in this article were built as the result of several discussions between Kent and a Cuban radio operator. bandwidth); and 420 to 450 Mc. J POLE ANTENNA DESIGN CALCULATOR by K4ABT. For the DIY Amateur Radio enthusiast, few things in life are as satisfying as designing, building and testing your own homemade radio antenna. Using this type of antenna can be a bit tricky, so G. RE: The SIMPLE 2m Copper 'J' Antenna "J Pole " is incorrect. I've constructed a 144/440 Dual band Open Stub J-Pole Antenna. SUPER J-POLE FOR 435MHz: 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. 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. 5 wl antenna. You can typically make one of these for under £10 , they roll up easily for storage and travel, and are great for use at home, or when travelling, for accessing local repeaters. A DISCUSSION OF ANTENNA THEORY by Paul Graham (K9ERG) J Pole Calculator and drawing by K4ABT G. Halos are normally horizontally polarized. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. A beautiful addition to the shed. 92) times the published lengths. Moxon Antenna A Great First Beam. It can be rolled into a very small coil for transportation and storage yet perform almost like a 1/2 wave dipole. 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. Effectively, the antenna is an end fed dipole. The top of the metal pole should not protrude significantly beyond the top of the metal mounting bracket, thus avoiding the creation of high SWRs. This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. Look online for a J-Pole calculator, there are several good ones. Antenna with SMA Male Connector. Wonder Pole® High Pole for pilot cars and over-sized truck loads. I have built many 2m J-poles. Visit the original J-Pole Antenna Store. On the twin-lead antenna, dimension A (the half wave) is 204 inches (518 cm. J POLE ANTENNA DESIGN CALCULATOR by K4ABT. 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. there was a simple way to convert a 2 meter J-pole into a dual band J-pole DBJ-2 was developed from the successful performance of the DBJ-1 but folks requested a portable version. 2m/70cm Dual Band J-Pole by KK4ICE. A Simple 2-meter copper pipe "J" pole; Tape Measure Yagi. pdf Easy to build Delta loop html Building instructions for CB radio J-pole antenna. Because the J-pole and Zepp are electrically identical in function, and are similar to all other end-fed antennas in problems, pages on J-poles, Zepps, and end-fed verticals overlap. Scanner Antenna: 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 wire2( Measuring tape3( Exacto knife or similar cutting tool4( elec. So, I decided that a pair of dual-band copper pipe j-pole antennas were in my future. I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna. Build it! If you have an SWR meter you’re well ahead of most. 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. Antenna with SMA Male Connector. A 146MHz J-Pole Antenna by WB8ERJ Here is a 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build. approach which we collectively arrived at to build copper pipe J-Pole antennas that are easy to construct, durable, and easy to tune. There are several features which make the ubiquitous Twinlead J-Pole antenna a good addition to your emergency grab-n-go kit. I had my Dad's antenna analyzer and found it works really well. 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. I wanted something a little more substantial, though, for when operating at my primary/secondary QTHs. The calculator can be used for designing a Super J-Pole antenna for just about any frequency or it can be used for the standard J Pole antenna by leaving out the top section. VonHaus 17-56" Tilt & Swivel TV Wall Bracket Mount with Cable Management System for LED, LCD, 3D, Curved, Plasma, QLED, OLED, Flat Screen Televisions - Heavy Duty 25kg Weight Capacity. This antenna will. Total cost for this antenna is under $10 (excluding coax) and it can be built in about an hour. If you watch closely, you can divide the J-pole in two pieces. According to the J pole Handbook, A BUX VBALUN ($20) should be installed at the antenna feed point, or where the coax or feed-line attaches to the J-Pole antenna. :-) Im about to build a super J pole out of 22mm copper tubing. Here is a picture of the antenna mounted on the new mast. It basically involves building a “roll-up” type two meter “J Pole” using 300 ohm TV twin lead and then inserting it into a length of 1/2 inch PVC tubing. This was done for a few reasons including 1) We believe that the dipole kit is much more versatile and will enable beginners to get. If you build it Use 1in copper and use the thick walled type for strength, also you will need to build some support/spreaders for the matching stub, I used plexyglass for the one I built but you could also use wood. These antennas work really well, especially if you live near the towers or a big city. Instructions. Arrow Antenna is now offering FREE SHIPPING on orders over $100 and $5 Flat Rate Shipping for orders up to $100 to the lower 48, Flat Rate Shipping of $15 for all orders to Alaska and Hawaii and $30 for US Territories and APO. Simple ADSB J-pole antenna I use Semirigid for my antenna but you can use coax 50 ohm cable also but you will need to support the shape for the balun and the antenna. This how to will show you how to build a 2 meter slim jim antenna from ordinary insulated copper wire commonly used for carrying AC (alternate current) electricity in your. 7 dBi gain and 18° Vertical Beamwidth. About the J-Pole. pdf Easy to build Delta loop html Building instructions for CB radio J-pole antenna. J Pole Lets start with this: The J-pole is actually might be a bit deceiving. My main shack location has a commercial J-Pole Dual band mounted on a short mast. Hf Radio Dipole Antenna Radios Long Distance Radio Amateur Ham Radio Antenna Radio Stations Diy Electronics Electronics Projects Building a Dual Band / 70 cm J-Pole Antenna Tim Wenzig. In that setting they are often called J-pole antennas because of their shape, especially when made from copper pipe. The idea of a folding version of the copper antenna appealed to me. Free Online Engineering Calculator to quickly estimate the geometric Size of a J-Pole Antenna. love them hi, favorite is the J pole antenna for CB, i am a licenced Ham G4VVQ, UK amateur, have you thought of doing clip for Doublet antenna, i gave one made from 2 pieces of wire, no joins, spacers are about 3 inches, goes to ATU with 4 to 1 balun, it’s 115 ft long, that’s as long as i ca get. It worked OK, but not awesome. The Amateur Radio Operator Antenna Basics Handbook Radio controlled (RC) toys can be toy grade or hobby grade. Figure 2––This EZNEC plot shows View Full Source. Scanner Antenna: 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 wire2( Measuring tape3( Exacto knife or similar cutting tool4( elec. This how to will show you how to build a 2 meter slim jim antenna from ordinary insulated copper wire commonly used for carrying AC (alternate current) electricity in your. Chameleon Emcomm III Portable HF Antenna review I added a video to a @YouTube playlist youtu. The antenna on the right is the 154 MHZ J Pole I built. Ruggedly constructed one piece design, this J-Pole antenna will last practically forever. However, I have built more than six of these antennas and can attest to the great performance. pdf), Text File (. 02 KB Web Pages on Packet Radio. This is ideal for most dual and radios that us a single antenna port for both VHF and UHF. The design uses a matching system like a j-pole antenna. A search for 2 meter J-pole or VHF J-pole will turn up a lot of amateur/ham antenna designs, just shorten the lengths to 146 MHz / 159 MHz (0. But don’t be misled – just because they are easy to make doesn’t mean they don’t work well. It was brought into the limelight by an excellent article written by John S. Thomas Valentine: swr does not an antenna make it effective radiated power that you want! i know a lot of people will say swr the lower the better but look at it this way a 50ohm dummy load will show a perfect match but wont radiate worth a darn. 25 inch galvanized steel mast. That means that mounting a two meter J-Pole at the top of a 10 foot pole will place the center of the radiating part of the antenna at about 13 feet. The ARRL Antenna Book describes the J-pole as a half-wave vertical radiator fed by a quarter-wave stub matching section (see fig. in our opinion, this product is definitely very popular and very good in terms of quality. Arrow OSJ144/440 Video Review. Fast Shipping, 120% Satisfaction Guarantee!. "Buck" Rogers Sr (68 years as K4ABT) The J-POLE has been around since the early days of HAM Radio, and is a direct descendant of the "Windom" Like the Windom or ZEPP, the J-POLE is a spin-off, or a modified WINDOM for VHF and UHF. The first antenna (aside from the obligatory ground-plane and j-pole) that I constructed was the moxon rectangle. Simple ADSB J-pole antenna I use Semirigid for my antenna but you can use coax 50 ohm cable also but you will need to support the shape for the balun and the antenna. The antenna on the right is the 154 MHZ J Pole I built. Your first antenna – the half-wave dipole. So before the snow storm hits tomorrow, I thought I would try making some j-poles with the Buddipole. Comes with brand new 1. The J-Pole antenna is much more popular on VHF Because it ends up being a long antenna on HF , it isnt all that popular However , on the 11m band , the J-Pole still has a managable length = 27 feet. – Multiple set-up options allow you to place antenna on a wall or pole. 1 - 18 3/16" length of number 12 wire. In order to increase the bandwidth and to provide proper phasing of the currents in the. We are proud to offer them a somewhat lower price. Best Ham Radio Dual Band J-Pole Antenna, Aluminum Cheap. Using this type of antenna can be a bit tricky, so G. The traditional collinear J-Pole, aka Super-J, improves the basic J-Pole. SWR should be < 1. Most of the repeaters I am interested in are in in the eastern direction from my house. They also appear in the ARRL VHF/UHF Antenna Classics, ARRL Vol 8 Antenna Compendium, ARRL Vol. The J-pole is typically one of the first antenna designs an aspiring homebrew-ham attempts. Build a Weatherproof PVC J-Pole Antenna By Dennis Blanchard, KIYPP 143 East Rd Hampstead, NH 03841 After you've built this antenna, you may not need anything else. The down side if a j pole is getting them rugged enough to stand up to wind and weather. It had to be an antenna not taking to much space, that I could build with parts that I still had lying around, but nevertheless still had a good SWR so I could transmit on it as well. 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. Forrest Cook WB0RIO. Hence the switch to the J-Pole. The J-POLE antenna is a quick and easy plumbers delight. The ‘J-Pole’ Antenna consists of a half wave vertical radiator and an adjacent quarter wave tuning stub which forms the classic ‘J Shape’. Building the Antenna I like the copper J-pole, so I started a design using that antenna as a model. It can be rolled into a very small coil for transportation and storage yet perform almost like a 1/2 wave dipole. A very easy to make and versitile antenna. The unique design of our universal J Mount allows you to get your TV antenna higher than standard 18 in. Ruggedly constructed one piece design, this J-Pole antenna will last practically forever. PVC legs were added to give it some stability. pdf Easy to build Delta loop html Building instructions for CB radio J-pole antenna. Cheap and Dirty CB Base Antenna you can build in an hour. The true copper "cactus" j-pole was so named because it consisted of two j-poles, one for 2-meter and one for 70-cm. Turns out I know the guy who makes the Ventenna through a mutual friend. 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. 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. For the DIY Amateur Radio enthusiast, few things in life are as satisfying as designing, building and testing your own homemade radio antenna. It works very well as a multiband antenna indoors. Sperrtof 2M Antenna-- aka Sleeve Dipole or Sleeve J-Pole. 2/70cm “j” portable antenna plus a novel base support by n6jsx. The cost to build this antenna is less than $2. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. About the J-Pole. while I really like this antenna, the 1/4 ground plane is a more simple antenna to build your first time and also more forgiving. Here is a J-Pole antenna that I built back in November of ’09. Feedpoint and testing must wait until next week. Total cost for this antenna is under $10 (excluding coax) and it can be built in about an hour. Best 38" J-Pole Antenna Mount Cheap. If you watch closely, you can divide the J-pole in two pieces. This how to will show you how to build a 2 meter slim jim antenna from ordinary insulated copper wire commonly used for carrying AC (alternate current) electricity in your. Basically all that is really required is a good swr meter designed for the bands you are building your J Pole antenna and some basic soldering skills. The airband J-Pole antenna is tuned for the 118 – 128 MHz aircraft aviation band. We also try to take the “magic” out of the J-Pole design by explaining how we arrived at the appropriated lengths for the various sections of the antenna. 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 have collected here below for your. This antenna has an omni-directional radiation pattern. We also offer. When mobile, I installed a Tram 1185 mag-mount antenna (which also works well, especially with the new FTM-100DR!). Once in position I will drill and secure each tee with a SS screw. 25 inch galvanized steel mast. See here for details about Gulf Alpha and Arrow Antenna. How do you choose a J-pole antenna on eBay?. It can be rolled into a very small coil for transportation and storage yet perform almost like a 1/2 wave dipole. Im barry, hi all. that of a well-known 2 meter/ 70 cm base station vertical. I’ve constructed a 144/440 Dual band Open Stub J-Pole Antenna. The DBJ-1: A VHF-UHF Dual-Band J-Pole - Bay-Net The 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 feed line for less than $10. antenna theory - How to calculate single-stub match (general case)? - Amateur Radio Stack Exchange See more. The airband J-Pole antenna is tuned for the 118 – 128 MHz aircraft aviation band. Thomas Valentine: swr does not an antenna make it effective radiated power that you want! i know a lot of people will say swr the lower the better but look at it this way a 50ohm dummy load will show a perfect match but wont radiate worth a darn. It is a good antenna. He loved working 20 meters, but the housing community he moved into prohibited antennas that could be seen by the public. Make your own Copper Cactus Antenna - The DXZone. Ed sells these antennas on ebay for $37. I am interested in the J Pole as much for the craft and do it yourself aspect as much as anything. wanted plans: j-pole 440. 3 Antenna Compendium. J-POLE is a free and portable antenna design software for Windows. J Pole Lets start with this: The J-pole is actually might be a bit deceiving. By ON4CFC Via Antennex Super J-Pole Antenna (Collinear Design) - By KB0YKI VHF/UHF Antennas-- By KB0YKI -- J-Poles, Super J-Pole, Omnidirectional, Quads, Yagis VHF EggBeater Antenna - From ON6WG / F5VIF Quick and Simple 2 Meter Ground Plane Project Via HamUniverse 2M Yagis. The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. Copper Cactus Dual-Band Super J-Pole Antenna Project. It took about 2 hours to finish. It does not hurt you to try or buy Ham Radio Dual Band J-Pole Antenna, Aluminum. This calculator can be used to design a Slim Jim or a J Pole antenna. So, to get the length of the ideal 5/8ths antenna for the full FM radio spectrum (centered on 98Mhz): 93. I am interested in the J Pole as much for the craft and do it yourself aspect as much as anything. The antenna was designed for military use from 2 to 10 MHz (some references say 2 to 30 MHz). 70cm J-Pole Antenna Project by John M0UKD. The "J pole " was a flag plole with several "J" antennas on different bands, written in QST several years ago. Mount the antenna on a pole about 6 feet long and fasten to a step ladder or some support with some rope or electrical tape. This was done for a few reasons including 1) We believe that the dipole kit is much more versatile and will enable beginners to get. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. 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 Meter J-Pole Jr 34 foot End Fed antenna A combination of antenna designs, namely the J‐Pole and Zepp along with Alpha Antenna's matching network. >> > Which antenna is better: 5/8 wavelength vertical or a J pole? >> >> Better for what? For example, a 5/8 whip would usually be better than a J > >Owen, I think the popularity of VHF mobile 5/8 antenna lies in it has >more gain than a 1/4 wl antenna and is easier to match to 50 ohms than >a. 300 ohm Twin-Lead J-Pole Antenna Design May 11, 2007 Rob Mavis - AE6GE The following is a description of a J-Pole antenna made from 300 ohm TV twin-lead. Making a Basic Slim Jim 2m Antenna The Slim Jim is probably one of the cheapest and easiest antennas to make, and it's a very handy one too. ost commercial 2-meter repeater antennas with gain fall into two categories:. But as I usually say, the choke will never hurt and always help. Both call for 1/2" EMT conduit. The basic "J" is reported to have >3dB of gain over a ¼ λ ground plane antenna and 6dB over an isotropic (theoretical) antenna. J pole plans Antenna building is my favorite part of this hobby. Hi, ive stumbled across this forum and its looks great so ive signed up. It’s interesting when doing a project like this to get a few different viewpoints because different people will say or show different elements that may end up being important for your tinkering. Universally fits all outdoor antenna models. 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. Every serious emergency communicator should have one. Build a Weatherproof PVC J-Pole Antenna By Dennis Blanchard, KIYPP 143 East Rd Hampstead, NH 03841 After you've built this antenna, you may not need anything else. A cantenna (a portmanteau blending the words can and antenna) is a homemade directional waveguide antenna, made out of an open-ended metal can. important because if the mast extends above the antenna ground plane it will affect the performance of the antenna.