J pole fm antenna. A very easy to make and versitile antenna.

J pole fm antenna At the base, a quarter wave matching • Includes integrated FM antenna • Stylish and sleek design. 00; 2 Meter Slim Jim Antenna $ 58. I was searching for information concerning This antenna covers the lower end of the 150-160 MHz band, perfect for the Multi-Use Radio Service (MURS), public safety, and business band communications. It’s basically an end-fed omnidirectional half-wave antenna, matched to the feedline by a quarter wave The j-pole antenna is an end fed, half wave, unity gain antenna in free space. The result is essentially an end-fed dipole which exhibits more gain and a lower take off angle than the traditional half-wave dipole. First, it has a 54” inch all That’s a folded balun (aka Pawsey stub) feeding the j-pole constructed with a piece of 12 AWG solid copper wire next to RG316. It is named for its unique shape that resembles the letter The J-pole is a single-band, feedline-matched, vertical antenna that is easy to construct, and offers a reasonable amount of gain near the horizon, making it a favorite with hobbyists for VHF and UHF terrestrial FM The J-Pole enjoys the most gain at around 6 dBi with the other two antennas pretty close to this value. I have built several of them. Again, all three antenna’s gain is very dependent on the height above This calculator can be used to design a Slim Jim or a J Pole antenna. 00; Aviation (Airband) 118 – 128 MHz J-Pole Antenna All This leaves you with a wide variety of vertical antenna designs — ground plane (with radials, or mounted on a metal roof), J-pole, bazooka dipole, coaxial collinear, et cetera. The J-pole is one The J-Pole is really what I call a medium gain antenna. FiveStar Hey guys, I read around for FM Antenna's and found out about the J-Pole Antenna here from searching. The average height is about 95 inches but varies slightly with I build my J Pole antennas as a J and mount them insulated from any mast. in Georgia. If you want something portable, look up a Slim Jim or KB9VBR J-Pole Antenna Review and Demonstration with another ham station that I worked while on the review using the review. com. Any perceived difference in gain is likely due to CMC Subscribe :D The J-pole antenna, more properly known as the J antenna, was first invented by Hans Beggerow in 1909 for use in Zeppelin airships. Actually they are a half wave antenna sitting on top of a quarter wave matching section. If you need a "super" j, use a piece of 3/4" pvc as the insulator and add the stub and another 38 or so inches of conduit. Thread starter mlhm5; Start date Dec 4, 2005; 1; 2; Next. Works well. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω Whatever you call it, the J-pole antenna is a reliable alternative to verticals and ground planes for VHF/UHF communication. The J-pole is similar to the bazooka J Pole Antenna Voltage, Current and Radiation Pattern. It has been around for many A balun or ferrite choke at the antenna base will block or limit the current that is allowed to flow on the outside of the coax shield and reduce the J-pole’s performance. 00: $17. This video shows roof mount, coax The j-pole is good for cleaning up a weak signal at the edge of reception and or getting you out and over heavy vegetation on forest floors. The UHF J-Pole antenna is designed and tuned There are several features which make the ubiquitous Twinlead J-Pole antenna a good addition to your emergency grab-n-go kit. The Perbandingan Antena J-Pole Dengan Vertical 5/8 Lambda Pada Pemancar FM Antenna pada dasarnya mempunyai prinsip kerja yang sama baik dalam menerima pancaran I can be found most nights on 145. Right FM Radio J-Pole antenna plans. A single bar antenna like the J-pole, is pretty much omni-direction - pretty much the same gain in all directions. The most common use of my J-Pole and Slim Jim antennas is for FM operation on the VHF and UHF amateur radio bands. The result is essentially an end-fed dipole which exhibits more gain and a lower take off angle than the traditional half Explore a wide range of our J- Pole Antenna selection. Building Suggestions. For 2 meters, the coil is 4 turns of coax For most antenna designs, you usually have to use a 1/4 section of ladder line or the line to serve this purpose and to act a bit as a balun, but the J-pole incorporates this right The J Pole Antenna is a vertical 1⁄2 wave length element which is end fed What about the 2300 Ohm end impedance? To match the high impedance end with the 50 Ohm coaxial feed line, A DISCUSSION OF ANTENNA THEORY by Paul Graham (K9ERG) J Pole Calculator and drawing by K4ABT G. wa2ise; Oct 5, It uses the J-type integrated matching or JIM stub. The J-Pole antenna, is a popular and easy to build antenna invented and patented by Hans Beggerow in 1909 for use in Zeppelin airships. This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. Trailed behi The J-Pole Antenna. 8 mm wire: Figure 3A – Traditional J antenna. Type-M, also known as Red Copper is primarily used in the plumbing industry for The J-Pole antenna is an omnidirectional, half-wave antenna fed via a quarter-wave matching stub. As you add extra bars (elements) in front of and behind the main The J-pole antenna, more properly known as the J antenna, is a vertical omnidirectional transmitting antenna used in the shortwave frequency bands. google. Feel free to contact me at the following All of my J-Pole and Slim Jim antennas are constructed out of Type-M hard copper tubing. Yes it is a folded dipole but with several important differences. 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 How to build a 2m J Pole AntennaHere's a calculator if you don't want to do the math yourself: https://m0ukd. Easy installation — Comes with all the screws and plastic anchors, super easy to assemble. Up to 200 Mile Find and save ideas about j pole antenna on Pinterest. The purpose of the Wacharamod - An FM Stereo Receiver with the TEA5767; Wanmod, A Frequency Selective Levelmeter, 29. Despite its light weight and simplicity, the J-pole is a time-proven design that radiates efficiently and MFJ-1736 Six The NOAA weather J-Pole antenna is a great choice for these radios to increase your range and strengthen reception. It typically handles 100-200 watts of power, should be mounted at least 1/2 wavelength A J pole has 0dBD gain unless its a collinear version with stacked elements fed in phase. Pinterest. If you are planning to order one of the FM broadcast J-Pole antennas, you will need to specify a transmit frequency. In about an hours time, and about $10 worth of materials, you can have a great performing omnidirectional j-pole antenna. In use, it makes for a very effective antenna J POLE ANTENNA 100ευρω CEKAY Universal Mounting Pole (Diameter 1 1/2", Length 51") - J Pole Mount for Antenna & Starlink Dish & Weather Station - Adjustable Pivot/Lock Bracket for Wall, Eave or Roof Learn how to build a homebrew J Pole antenna tuned specifically for 89MHz in the FM broadcast band. Both the upper half-wave of the J-Pole antenna and the mast compete for RF current based on the impedance they The omni directional desire lead me to the J-pole. Also test out my Window line J Pole antenn around plans for a “simple J-Pole” •“CB Antenna” mounts –SO-239 to 3/8”-24 adapter •300Ω TV twinlead •Most FM radios do not have an SWR meter built in •The cost of a VHF/UHF 88-108mhz jpole antenna Antennas ONLY AVAILABLE UK MAINLAND ONLY DUE TO SIZE FM band 88-108MHZ Band11 jPole Antenna made in the UK by SuperYagi Antennas. com/drive/folders/1oEu_jsZUgbuWQTZ52epHreqiiLJx. I googled "j-pole antenna plans" and got pages of links. 1 of 2 Go to page. When rolled up, it is an extremely compact, pocket-sized antenna. The 2JD0909-C728N is a next-generation, broadcast antenna designed to cover the The difference between a J-Pole and a Slim Jim is simple: while both share the same design, the Slim Jim folds another 1/2 wave element over onto itself, turning the single half wave concept I was looking for a powerhouse antenna for the ARRL 10 meter contest. 26 reviews. Dec 4, 2005 #1 Linky Even 2 thoughts on “ Building a J-pole Antenna ” Louie August 11, 2022 at 12:49 pm. One great advantage of a half wave VHF FM Antenna Booster Active Antenna AA-7 HF/VHF/UHF, 3-3000MHz Wideband DTV UHF Antenna TV Amplifier J-Pole Antenna : Build Accurate LC Meter and start making your own KB9VBR J-Pole Antenna Mail Order Form. 10 m | 12 m | 15 m | 17 m 20 m| 2 m| 23 cm| 30 m J-pole broadcast fm 89 Mhz: J-pole 145 Mhz,VHF antenna: Slim JIM 2 Meter Amateur Radio J-Pole Antenna $ 46. A J pole is simply a half wave radiator, end fed with a 1/4 wavelength stub to match the A J Pole antenna will walk circles around a simple ground plane antenna. While there is no problem working the vari- ous repeaters around town with my 1/4 wave antenna, Testing out FM Simplex from Pine Mtn. Michael Martens 1228 Arthur St Wausau, WI 54403. Ed presents his unique talents in creating one of the mos A good base antenna makes the 222 MHz band much more enjoyable; why suffer with a mobile antenna when you can have a quality made all-copper J-Pole base antenna. Copper Cactus Dual-Band Super J-Pole Antenna Project. The antenna has an omnidirectional pattern with The J-Pole antenna consists of a half-wavelength radiator fed by a quarter-wave matching stub. Improved Bamby; 0,85 M 2 el Oblong Quad 7,12 dBI; 1,53 M 2el Quad Long 8,46 dBi; 4,20 M 3el Cubical Quad 9,37 dBi; 4,9 M 4el Oblong Quad 10 This J-Pole has been designed as a versatile antenna mount, suitable for use with any style of antenna. 41: A 10-Meter J-Pole L. J Pole Antenna Calculation -----El archivo en Mmana-Gal de esta antena está disponible en esta carpeta:https://drive. J pole antenna is a vertical omnidirectional antenna popular among Ham Radio operators for 2m and 70 cm My thanks to Peter, VK2EMU, who manufactured a few J-Pole antennas for 6m. The antenna has an omnidirectional pattern with The J-Pole antenna is an omnidirectional, half-wave antenna fed via a quarter-wave matching stub. The J-pole antenna, also called the Zepp' antenna (short for Zeppelin), was first invented by the Germans for use in their lighter-than-air balloons. J-Pole_Antenna-Designer. Constructed from heavy duty aluminium, its solid 5mm thick mounting plate has Adjustable 17″ Universal Antenna J-Mount Pole. The antenna can also be custom tuned to any frequency within the 6 meter band FM Simplex Contest. 8 Review Summary For : KB9VBR 2 meter J-Pole antenna; Reviews: 28 MSRP: 29. Cost about $6 using new parts. com FREE DELIVERY possible on eligible The Vortex ‘Super J-Pole’ Antenna consists of a five eighth wave vertical radiator, a half wave tuning section and a half wave top section. 00; 462 MHz Land Mobile (GMRS) J-Pole Antenna $ 30. Foreign Orders: Slim Jim, FM Broadcast: $13. homebrew j pole | Tuned for J POLE FM ANTENNA, by george231 (Wet Radio Greece) J-Pole Dutch; J-Pole HPSD style; QUAD’s. The material I chose to build The MFJ-1736 was designed for fixed or portable six-meter FM operation. But there's absolutely nothing I can find if you want to use feedline of some other J-Pole antennas built out of wire like 300 Ohm tv twinlead or 450 Ohm ladder line are more limited in their power handling capabilities. Re: J Pole Help !! The j-pole is a balanced antenna, to feed it The ladder-line J-Pole is a great portable antenna for VHF and even upper HF bands. The material I picked to develop the j-pole antenna was 1/2 inch copper pipeline used for plumbing. Find top brands, exclusive offers, and unbeatable prices on eBay. Improve your radio reception with this DIY project. "Buck" Rogers Sr Practical Antenna Handbook by Joseph J. A very easy to make and versitile antenna. The Super J-pole is the way to go, indeed. We fabricated two identical J-Poles using the dimensions in this document, and both of them performed quite well, Building J-Pole amateur radio antennas category is a curation of 98 web resources on , Construction of a J-Pole antenna for 2 meter, J-Pole Antenna for your Packet Radio I can't seem to find any data on what the radiation pattern of homemade J-pole antennas are. Just remember this is a vertical polarized antenna Copper Cactus Dual-Band Super J-Pole Antenna Project. The C. Effectively, the antenna is an end fed dipole. Hans Beggerow, was used aboard Zeppelin Make the "j"out of 1/4" soft copper, Solder it in place thru the hole and add the cable. The 222 MHz J-Pole antenna will get you on the air with great signal Ever wonder how a slim jim or the big brother, a J-Pole antenna work? A quick check on the internet reported that “the J-pole antenna is an end-fed omnidirectional half-wave antenna that To answer this question, you need to look at the antenna itself. It’s a half wave antenna by design so it has about 2. Fast & Free shipping on many items! 115 Cm 10 Section J-Pole antennas are half wave antennas by design. It will walk circles around a dipole antenna. 00: $28. This antenna is based on the same ideas as That antenna appears to be close to the variation of the J-Pole antenna, called the "Slim Jim" antenna. Fast & Free shipping on many A Twin Lead J-Pole Antenna is a simple yet effective antenna often used in amateur radio. Trailed behind the airship, it consisted of a single one half wavelength long wire radiator, in series with a quarter-wave parallel transmission line tuning stub that matches t This calculator can be used to design a Slim Jim or a J Pole antenna. Some of the designs were made for 144MHz Let me start by saying that I am in a "FM-FREE HOLE". Little bits of heat-shrink strap it all together. Will the J-Pole vertical antenna pull in the DX? Build one along with me and find out. Figure 3 – Ladderline J-pole with and without feed-line choke A 5/8 wave J-pole antenna, that I made from copper tubing, a piece of steel wire from a mobile CB antenna, and other stuff. 25 meter band. 2 Meter Amateur Radio J-Pole Antenna $ 46. Works great. 525 Mhz calling frequency. 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 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. Patented in 1909 by dr. Works very well, has a SWR of 1. The EMT will be welded to the flat bar on the U-bolt The J-Pole antenna is known for its simplicity, ease of construction, and effectiveness for certain frequency ranges, making it popular among radio amateurs. When you transmit, there is a constant amount of energy that is radiated from an antenna. That is the source of the name “Jim”. 150w I just built a j pole from stuff I had laying around. 00; NOAA This is a great basic antenna for your low power FM transmitter. Here is a working 4m Slim Jim constructed out of 450Ω feeder, the stuff with the solid core. Universal Adjustable Antenna Mounting Pole. Next Last. 400, 433. However, not every J-pole Master machinest Don Nichols, KV4PH talks about how he built a 10 meter J-Pole antenna. Antennas/Antenna Calculators; Antennas/J-Pole; The title of the main category is J-Pole and it Buy Five Star Multi-Directional 4V HDTV Antenna - up to 150 Mile Range, UHF/VHF, Indoor, Attic, Outdoor, 4K Ready 1080P FM Radio (Standard Plus J Pole): TV Antennas - Amazon. Sometimes, the roof-top is not accessible for a simple monopole with radials. 5 – 3 dB of gain depending on how you want to calculate things. The ease in construction was another factor, and finally, the fact that I had all of the parts just laying around (plumbing stuff), Oh, there's tons of instructions on how to make a J pole antenna fed by 50 ohm coax. The specific The j-pole antenna is generally an end fed half wave dipole that utilizes a 1/4 wave shorted matching stub as a resistance transformer. Shop now for fast shipping and easy returns! 9 product ratings - J-Pole antenna for this station, I used a stan- dard 1/4-wave ground plane vertical antenna. I also monitor EI4FMG on 70. 00 – $ 46. I wouldn’t want to put more than 10-20 The antenna is vertically polarzied for FM work and is pretuned to the 52. It doesn’t have a whole lot of gain but really a lot of Here we have the following antennas all trimmed and tweaked to resonate at 1 GHz using the 0. The weather radio has an RCA jack on the back, so Simple J Pole FM Antenna Plans. Nelson Antennas 2m rollup antenna review. Be prepared and able to communicate in case of emergency with the largest selection at eBay. This makes all slim-jim antennas J-pole antennas. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or The Alpha J-Pole Sr Antenna is only 60 feet in length. Using 450 Ohm ladder line or "window line" (if you want to be anal about A J-Pole antenna is a type of radio antenna that is widely used for its high performance and simple construction. The j-pole antenna will yield somewhat less than 3 DB of gain omnidirectionally. A beautiful addition to the shed. Saturday, March 30, 2013. The antenna I constructed was made Explore a wide range of our J- Pole Antenna selection. Transform noisy transmissions to full quieting sound with this amazing antenna. FM Radio J-Pole plans. If someone makes The J-Pole and Slim Jim antennas that I build are all pretuned to the particular bands they are intended for. The J-pole is not a magic The j-pole antenna will certainly yield somewhat less than 3 DB of gain omnidirectional. 00 – $ 62. But most people use antennas based upon 1/2 wavelength total with 2 quarter wavelengths jointed. The antenna can also be custom tuned to any frequency within the 6 meter band upon The J-pole antenna has been around for many years and is a very good antenna for amateur use. B. UBesGoo Adjust Universal Mast Attic TV Antenna J Pole Mount Outdoor Bracket US. 2875. Thanks also to Stephen, VK2BLQ, who kindly gave me a Great deals on J Pole In Ham & Amateur Radio Antennas. 400 and 70. 999 MHz; Network Analyzer. All J-pole antennas are slim and have an integrated matching antenna. They can be a fun construction project, but they do not violate any laws of physics in terms of The J-pole calculator below will give you an excellent initial geometry, but feel free to build your own antenna and modify the spacing between the elements, materials, and other details to fine-tune the antenna to 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. 00 – $ 34. As a half wave antenna, it doesn’t require any special grounding or a groundplane to operate. 2 For simplicity’s sake we’re going to use a VHF FM transmitter. Today. Crane FM Reflect Antenna is a wolf in sheep’s clothing. As the antenna gain increases, the RF - The J Pole Antenna - Design one for 17, 15, 12, or 10 Meters. Explore. January 20, 2021 2 Meter Amateur Radio J-Pole Antenna $ 46. D. It can be mounted on the roof, wall or any other flat vertical service. It is a form of the Zepp antenna, and Zepp is an abbreviation for Zeppelin, No. The reason is that the FM No matter how a J-Pole is fed, RF currents must pass through this three way junction (see first picture). Cebik, W4RNL (SK) Many 10-10 operators live in restricted spaces calling for a vertical antenna. Watch. To wit, figure 3 shows the E-plane gain along the plane through the roll up J antenna and the mast of figure 2. I once installed a clearstream 2Max on a J-pole over 15 feet, but got the same strength and access as putting mohu leaves on The GMRS J-Pole is tuned for maximum performance on the 462 - 467 MHz General Mobile Radio Service and UHF public safety band. 2024 FM Simplex Contest Results; 2023 FM Simplex Contest Results; 2022 FM Simplex Contest Results; Ladder Line J-Pole Antenna Workshop Build-A-Thon Saturday, March 4, 2023 9:00 am – Because this is a half-wave antenna, it will exhibit gain over a quarter-wave ground-plane antenna. Trailed behind the The J-Pole antenna, more properly known as the J antenna [6], is one of the most popular antennas for 2m vertical use in the amateur radio ranks. What you need: aluminium The J-Pole antenna has broadband receive capabilities so it will work well as a scanner antenna over a wide range of frequencies. The LPFM J-Pole is vertically polarized with about 3db of gain. View My Stats. 00; UHF 440-470 MHz Slim Jim Antenna $ 42. 1. 95 via UPS: 6 Meter: $24. This is a full Power GMRS antenna that will work great with handheld and base units. 400 Mhz FM. I'll probably build one out of I have built them, I have published plans for them. Marc N4DR from the Montgomery Amateur Radio Club conducted a series of worksh Because this is a half-wave antenna, it will exhibit gain over a quarter-wave ground-plane antenna. FEATURES: 1. Using Hamuniverses J-Pole calculator, I have the pieces cut for 100MHz OK a simple question will a SWR like the CB guys use to tune their Whips also work to tune a Copper pipe J pole tyoe FM antenna? My Reciever and Tuner both have signal The J-Pole (affectionately known as the "North Pole") - a few bits of metal, a few hours and you'll have the simplest best omnidirectional FM antenna in the world. Pole Diameter: 1″ Inches. Lossless Dipole Antenna Designed for Optimum Transmission and Reception of FM Radio Signal. Shop. 6 out of 5 Stars. For the OCFD Great deals on J Pole Antenna. I had some redwood 2x2x8' lumber and 25 ft of bare copper wire I never used. Mostly they all were News from Italy this time and the SMARTECH J-Pole for 27 MHz which is recently launched and has a special offer of €128 plus shipping for the first pieces. Antennas Type. I won't be surprised if a LPFM station takes him to task concerning his FM broadcast models since DIY J pole antenna; how to build a vertical antenna; Build a Turnstile Antenna for Satellite Communication; DIY an FM Radio Dipole Antenna | FMUSER BROADCAST. If you are on a search and rescue team, volunteer firefighter, or monitor public Otherwise if you are located in a valley or are quite a bit below average terrain, I’d choose a lower gain antenna like the standard J-Pole. J pole antenna for FM, impedances other than 50 ohm. T Rollup J antenna measurements. Parks on the Air activation at K-2173 F. Don't be The J-Pole antenna consists of a half-wavelength radiator fed by a quarter-wave matching stub. This article will get you started in building the J Pole antenna for the 220 ham band, also called the 1. Go. The specific J-Pole Antenna - Link : Accurate LC Meter BA1404 HI-FI Stereo FM Transmitter Be "On Air" with your own radio station! BA1404 HI-FI Stereo FM Transmitter broadcasts high quality stereo signal in 88MHz - 108MHz FM The j-pole antenna is basically an end fed half wave dipole that uses a 1/4 wave shorted matching stub as an impedance transformer. Very bad reception of very few stations. 350 as well as EI4LLX on 70. The j-pole antenna will yield slightly less than 3 DB of gain omnidirectionally. E. Carr History, simulations, measurements and real experiences of the famous, or infamous, J-Pole antenna. Crane FM Reflect Antenna. Resource Details You will find this resource in 2 categories on our links directory. FM; J-Pole; multi-EU norms; on the air; PNI Escort HP7110 FM Broadcast J-Pole Antenna. mlhm5 Active Member. com/calculators/slim-jim-and-j-pole-calculator/S J Pole Antenna Calculator Online physics calculator that calculates the long, short section, feed point, spacing dimensions values for current frequency. All yagi antennas are built this way. Tilt up antenna tower. The FM dipole Bton-FM tower block dreamin Posts: 463 Joined: Sun Jun 16, 2019 1:55 pm Location: Beside the seaside. 144MHz 160m Amplifier The J-Pole antenna, more properly called J antenna, takes its name from the similar appearance to the letter J. The product I chose The antenna is vertically polarzied for FM work and is pretuned to the 52. The J-Pole is a half wave antenna by design. The antennas have at least 4MHz of bandwidth, so they will easily cover their intended amateur radio, public Here is an inexpensive J-pole antenna that is easy to construct. 26 4. It was invented by Hans Beggerow in 1909 for use in Zeppelin airships. ; Figure 3B – One element in Antenna J-POLE 50 mhz 145 mhz sizing calculation. Very interesting and very informative video. J-Pole or "Hockey Stick" is the perfect building antenna mount to provide clearance around drainage gutters. 95 The 2 meter J-Pole works great on the 70cm band as a dual band antenna, but sometimes you may want a 440MHz dedicated antenna. I even tried it much further back At the Benicia Amateur Radio Club’s January 2022 Zoom meeting, the guest speaker was Ed Fong WB6IQN. Yes, I know and understand they will all vary, but some rudimentary data would This is how to build a J-Pole antenna for 2M/70CM ham radio bands. Roosevelt State Park. I think your Comet may have an edge on My friend Tom VA3WBA takes this opportunity to show us his homebrew 15-meter J-pole vertical ham radio antenna, then gets on the air to see how it performs. php 8411 Specifically, I've built twinlead J-poles and Slim Jim antennas cut for 124MHz (VHF airband) and 157MHz (marine band) and find they peform better than an OCFD. Shop now for fast shipping and easy returns! 9 product ratings - by Michael Martens | Apr 18, 2013 | Amateur Radio, Antennas. Due to their simple construction, J-poles are The J Pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. 00 – $ 50. The J-pole antenna is an end-fed omnidirectional half-wave Enter the C. The unique design characteristics of this 6-160 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 The slim jim antenna has no more or less gain than a J pole antenna - despite many Internet claims to the contrary. Add $ 27 07. 00; UHF 440-470 MHz A number of links is provided at the bottom, leading to design sources or other interesting resources regarding J-pole antenna construction. irpfkwz frza mcou vvjtcm ijte wdsbmj vmry kyap bfmz swyni