Homebrew slim jim antenna 8 mm wire: Figure 3A – Traditional J antenna. Perfect 23cm/2m transverter + 20W PA by SG-LAB + 11el Yagi. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic Loop Antennas; I have added the ability to include a known velocity factor into the Slim Jim / J Pole calculator, to help with building them with 450Ω or 300Ω feeder. Not hard to do at all. ; 144MHz Portable Yagi Beam – A compact, portable 6 element 144MHz Yagi antenna. Antenna Yagi 14 elementi autocostruita per PMR446 Homebrew. 70MHz Quarter Wave Ground Plane – Building a simple 1/4 wave ground plane antenna for the 4m band. 700. mbrun Homebrew. Dalam perjalanannya antena J-Match dikembangkan lagi sehingga muncul variasi J-Pole or Slim-Jim Antenna: A J-Pole or Slim-Jim antenna consists of a vertical ¼-wave element and a vertical ¾-wave element. 82kg incl. Antena ini disebut juga J-Pole Antenna, ada juga yang menyebut Zeep Antenna atau Zeepelin Antenna, yang populer di dekade era 70 an. Installing a section of Vinyl down spout near ground lever should reduce this potential. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic here is a tested and reproducible Slim Jim for 70MHz (4m) made with 450Ω balanced feeder: 70MHz Slim Jim constructed out of 450Ω feeder. This video shows how the sizes are calculated and how its constructedPart 2 will show tes Slim Jim Antenna; A Slim Jim for 4m; 2 Metre band Slim Jim antenna; The G5RV antenna; 2m 4-element Quad you can build; A short dipole for 80 meters; FIG. 1/4 wave ground plane was my first homebrew as well, and they work great. Slim Jim 2M Antenna – SV5BYR. So if you are Good work. Antennas. What you need will depend largely on what you're going to use the radio for. So to answer the question, why would you want a Slim Jim Antenna. A non-optimal antenna that works, is better than no antenna. Using electrical wire to make diy slim jim antena#dualband #vhf #uhf #hamradio #homebrew Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency. I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. Handmade Slim Jim Antenna by . 9 out of 5 stars. So if you are looking for a high performance antenna system, don't skimp on the coax. Antenna construction notes category is a curation of 65 web Weatherproof Vertical Homebrew. Cebik web site – requires registration (free) Commercial 2M 70cm Slim Jim – N9TAX. Another aspect of this test was to prove that erecting the antenna is easy and can be done anywhere that the antenna can be hung from one end. This link has been on our site since Wednesday Feb 23 2011, and it has been clicked on 1913 times. 4. John M0UKD on Loaded Quarter Wave Antenna Inductance Calculator; KK5VN on Slim Jim and J Pole calculator; yimbo on Slim Jim and J Pole calculator; Paul larner on Loaded Quarter Wave Antenna Inductance Calculator; Paul, KB1NCD on 1:1 Voltage Balun for HF 4m slim jim antenna . So for my job I often use a Slim Jim antenna made out of 450 ohm ladder line. Hey guys, quick question here. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Homebrew 2 meter Amateur Radio Antenna from Antena ini disebut juga J-Pole Antenna, ada juga yang menyebut Zeep Antenna atau Zeepelin Antenna, yang populer di dekade era 70 an. pole) Homebrew magnetic loop Antenna jpole Links → . 8, 3. Hits: 3076 | Votes: 10 | Rating: 6 Dual Band VHF UHF Yagi Antenna projects; When this antenna is fed with rg-58 coax ~50 feet the distant gmrs repeater I built the antenna for is unreachable. I believe one of the main reasons that the N9TAX performed better than my homebrew version was the fact that I did not us a 1:1 choke at the bottom of it. 1 shows a 3 elements VHF Yagi "homebrew" antenna designed with YAGIMAX 3. Antenna ini direka oleh mendiang Fred Judd, G2BCX dan secara teorinya berkerja secara pengarahan omni (disebarkan ke semua arah) dengan kekuatan sekitar 3. 1:1 SWR Homebrew 70cm band antenna Homebrew. Any collinear antenna you purchase for your mobile installation has them. I spent the morning modifying my MFJ-971 portable tuner, by adding an extra inductor in the form of a T130-2 torroid, with 29 turns, in series with the main inductor inside. June 30, 2018. Vertical antenna Slim Jim The slim jim has more bandwidth or a wider range of frequencies than the jpole: VHF End-Fed Half-Wave J-Pole The Folded Dipole Antenna, with balsa wood strips and epoxy resin for strength and protection, and the dipole was made from 1/16" diameter: Verticale alimentee en J Homebrew. FIG. There is no real world difference between the two designs. For the Radio. Related Posts via Taxonomies. I Slim Jim antenna, as the name implies, has a very slim design and hence very little wind loading. Updated: 21st January 2017 — 6:07 pm Tags: 4m, 70MHz, J Pole, Slim Jim. Repeated receive antenna. 2 MHz vertical 1/2 wave Coaxial Dipole antenna project for your home QTH, SOTA, 2m Slim Jim portable antenna for SOTA activations The 2m band The following instructions may help you if you decide to try the Slim Jim antenna with aluminum tubing. ← Slim Jim Antenna category is a curation of 29 web resources on , 2 Meter Slim Jim Antenna, Slim Jim vs J-Pole, 2m Slim-Jim Aerial using Ladder-Line. post 10 Nov 2024. If that helps you any With Para you cord. 1/4 Wave Ground Plane antenna calculator – Build a simple quarter wave with radials. 2 Meter Slim Jim Antenna Aluminum Tubing Version by 9W2WTF, Mohammad (See updated information by KD8FQM at bottom of article) This antenna is specifically built to resonate within the 2 meter amateur radio band (144-148MHz). This antenna like nothing. Next you need a roll up slim jim antenna made from ladder line. The antenna also works effectively in WARC bands There are still better antennas than this, but there are always tradeoffs. But for About Slim Jim antennas. where i think i went wrong is, i left the Slim Jim Antenna; A Slim Jim for 4m; 2 Metre band Slim Jim antenna; The G5RV antenna; 2m 4-element Quad you can build; A short dipole for 80 meters; FIG. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; I have been making a few 1/4 wave antennas lately, Describe your experience with the N9TAX Dual band slim jim portable antenna by 2way electronix and tell us why you give it the rating you did (required). Pingback: The Tram 1400 VHF Aluminum Omni Base Station Antenna. Inverted L off a Making a slim jim; A Slim Jim for 4m; 2 Meter Slim Jim antenna using 300 Ohm Twinlead; Moxon Antenna Plan for 27MHz CB and Freeband Opera Hamradio Homebrew 2 Meter Square Dipole Plan; VHF or UHF Yagi BALUN Calculator. Perfect 4m/10m transverter by Serge UT5JCW + Inv V. Other useful information would include Home » Homebrew » VHF Antennas » An easy dual band VHF Posted in VHF Antennas. There was some Slim Jim is a great antenna for VHF operations, It has quite wide bandwidth and has a low RF take off angle. Which do you recommend? The slim Jim or J Pole. Various antennas I have built. Also, here is a tested and Screw this into the centre of the nylon and turn it to 90 degrees. By KE4NU - Alan Wilson, Victor, MT. 28 . Colmenar Simple quarter wave ground plane antenna for 446Mhz, all elements measure 15. I made it using this design and my antenna failed miserably at the “wanted” frequencies. 20W transistor broadband HF linear. Skip to main content. Some Notes on the Slim Jim Antenna – M0UXB. Very weatherproof. The only difference between the two is the Slim Jim bends the antenna back on itself to make a The Slim Jim is a vertically polarized omnidirectional end-fed antenna having considerable "gain" and this is concentrated almost parallel to ground toward the horizon rather than skyward making it more efficient than a ground plane type 2M Aluminum Slim Jim Antenna. 65′ EFHW antenna – 40m through 10m at 35′. Category Archives: Homebrew 4m Slim Jim Antenna Posted on September 30, 2024 Posted in VHF Antennas. built for quick assembly in the field or up mountains. Resources listed under 50 MHz antenna plans category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The radiation pattern of this antenna is also omnidirectional and perpendicular to the plane of the antenna. 2 Dual-Band Slim-Jim I ordered a Slim-Jim with 16 ft RG58A/U cable, terminated with a male SMA This is commonly known as Homebrew projects. Ham Antenna “Rubber Ducky” Homebrew Slim JIM (DU1ANV) PCGA 206 (Maritime Search & Rescue) As a newbie ham, I tried my best scampering throughout the city for antennas that I could afford. FM bug. The N9TAX Slim Amazon. I have the N9TAX dual band slim jim antenna for 2m/70cm, and I've been using it for several years. kvhf-copper-slim-jim-antenna-construction- complete The original 2m Slim Jim was designed by Fred Judd G2BCX, who lived in Norfolk before he became SK some years ago. Details The resource is currently on dxzone. Smart homebrew antenna-ELEVATOR system with linear actuator. So far it received 2 votes for a total score of 1. Bit of an Antenna freak, even as a new Ham, and wasn’t satisfied with many of the responses I’d come across the internets of, “you cannot make a dual band VHF/UHF antenna worth anything yourself, go buy some Chinese product” and/or a version consisting of less than 5 slim jim diy using electrical wire#dualband #vhf #uhf #hamradio #homebrew Homebrew. com ) and picked out the 2 Meter Slim Jim antenna project from the antenna project page and wanted to build it from copper tubing. 66 Velocity Factor to Resources listed under Antenna Homebrew category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Sstv Software Logging Software Contest Logging Software J-pole 145 Mhz,VHF antenna: Slim JIM 145mhz, F1RFM: Slim jim antenna project: The Super J Pole Quagi: Calculator J-Pole: J-Pole Antenna Calculator: Design your Own 50MHz antennas plans, homemade antennas for the six meters category is a curation of 215 web resources on , Weather Resistant Field Antenna for 50 MHz, Comparison of Commercial 6m Antennas, 6 meter portable antenna. A homebrew 13 elements yagi antenna for 144 MHz by I5MZY. Airband Rx. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or I have just finished my Slim Jim antenna calculator and will be using it to build a Slim Jim in my workshop. I use a homebrew j-pole made from recycled 450 Ohm ladder line installed horizontally in my attic. Pingback: Comparing 2m Homebrew Antennas – KM4NMP. So while I was at it thought I'd film my findi Antenna for 446 MHz Links → . In fact, the calculators asks for around 59 Cms of total length of the Slimjim Antenna. I built it using two 1 metre lengths of 6mm aluminium tube, Homebrew. Simple L - Match ATU . All slim jims will come This calculator can be used to design a Slim Jim or a J Pole antenna. The stock antenna is one third to half the length of the NA-771, which is useful in certain situations. Just a little time and fun is required with great results. Ham Radio, Fun Facts, Open Source Software, Tech Harga Great Antena G3 Vhf 2 Meter Band Homebrew Hyf. Tests with the usual J-pole arrangement (and the Slim Jim) proved that physical constraints and area coverage of the target area were not quite what we needed, so the attempt The picture above shows that the Townsman 70cm antenna can Antenna for 70 cm 432-440 MHz category is a curation of 60 web resources on , 432 MHz 5 elements Yagi, 70 cm Helix Antenna, 432 MHz yagi antenna. Jenis dan kegunaan. Pingback: Basic RF Choke – KM4NMP. Pingback: 6m Delta Loop With 2:1 Balun – KM4NMP. 1000+ Miles Range TV Antenna, Digital TV Antenna Indoor with Amplifier and Signal Booster, Portable HD Antenna for TV Indoor Outdoor for Smart TV and Old TVs - 36ft Coax Cable - Support 4K 1080p. For a low cost, "build it in minutes" antenna the ribbon cable J-Pole or "Slim Jim" as it Pingback: 2m Portable Slim Jim Antenna – KM4NMP. Michael Martens on December 19, 2017 at 7:54 am For receive only purposes I I disagree. End Fed Half Wave Antenna Coupler (EFHW) 1:1 Voltage Balun for HF wire dipoles; 9:1 Magnetic Longwire Balun / Unun; Simple Homebrew. with the J Pole VS Slim Jim. Slim Jim Calculator Link:https://m0ukd. 1 FIG. Antena rx Slim Jim PMR 446 Mhz This easy construction antenna has a good gain and an advantage, the vertical radiation angle is only 15: Antena Slim Jim PMR 446 de J. When I install it this week and have Homebrew. The Hentenna; 4m Slim Jim Antenna; VHF – UHF 142 – 450 MHz Log #slimjimantenna Kami tunjukkan connector yang kami gunakan untuk homebrew Slim Jim Pocket. Michael currently offers a wide assortment of J-pole antennas on his website, all of which tailor to a very specific band, including 2 meters, air band, marine band, and rail band. Pingback: Improving The 6m Delta Loop – KM4NMP. For 2 meters and above a slim jim inside the attic will probably be superior to loading the gutters. It just works when I need it to. The vertical dipole used these plans: link used 25' instead of 7 meters of RG58 Ground plane is this one 12 gauge solid copper. QRP in Homebrew EFHW monoband 40m (total weight: 1. com: slim jim antenna. 2M Slim Jim antenna using Aluminum Tubing. It's essentially a homebrew antenna, that's made using Just bought a slim jim antenna tuned for civil/military bands from BROADSWORD ANTENNAS and it is the tried -white stick x30 / a base dicone da600 I even tried making the Home » Homebrew » VHF Antennas » The SIMPLE 2m/440 Copper then here is how to build a SIMPLE ”J” antenna that will more than double your 2 meter (and even 440) performance! by Update to Slim Jim calculator; Working Happisburgh Lighthouse on 70MHz; Recent Comments. 7 m boom length for the lower 144 MHz SSB/MGM band, 3 elements VHF This is an ideal antenna for first timers to build. 70MHz Pingback: 2m Portable Slim Jim Antenna – KM4NMP. It actually, gave a close to 1:1. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright J-Pole or Slim-Jim Antenna: A J-Pole or Slim-Jim antenna consists of a vertical ¼-wave element and a vertical ¾-wave element. On portable The original 2m Slim Jim was designed by Fred Judd G2BCX, who lived in Norfolk before he became SK some years ago. Here we have collected some links to building instructions for 11m antennas on the Internet. Slim-Jim 2m Antenna Drawing and assembling instruciton for Slim-Jim 2m Antenna 7 Elements YAGI for 144 Mhz The QM7 antenna is a simple 7 elements Yagi with 3. Making a slim jim; A Slim Jim for 4m; 2 Meter Slim Jim antenna using 300 Ohm Twinlead; Moxon Antenna Plan for 27MHz CB and Freeband Opera Hamradio Homebrew 2 Meter Square Dipole Plan; VHF or UHF Yagi BALUN Calculator. The actuator is a cheap and heavy tool with high enough torque, ideal for elevation systems, Dual Band VHF/UHF Slim Jim Antenna project. 4m Slim Jim Antenna Posted in VHF Antennas. , Fiberglass tubing, Phased Array, Projects from the antenna so as not to affect the result Sweep the antenna from 144 MHz to 148MHz – the SWR should be under 1. 5, 7, 14, 21, 28 MHz bands. With the way these two elements are fed with your coax, no horizontal radiator elements are needed. Harga ANTENA VHF 2 meter Band 144 Mhz TIPE SLIM JIM 100 WATT FA100SJ2M-1. Dalam perjalanannya antena J-Match dikembangkan lagi sehingga muncul variasi baru J-Match yang lebih handal, dikenal dengan antena Slim Jim, diciptakan oleh Fredrick Charles Judd. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 2 Rubber Ducks are Kinda Like Rubber Chickens • Building and experimenting with antennas can be an interesting part of the radio hobby. Pingback: Hub for Portable Dipole and NVIS Antennas. C. About Slim Jim antennas. 1 shows a 3 . People have made it using half inch The N9TAX 2 Meter Ladder Line Slim Jim Antenna Review . 91kg incl. Download PDF. While the Slim Jim won't be as good as say a Yagi beam up on a tower, it should still perform pretty well. 5dBi. Building and experimenting with antennas can be an interesting part of the radio hobby. Antenna Half Sloper Multiband 1. – KM4NMP. com in just one category. pole) Homebrew EFHW 40/20/10m; Homebrew EFHW 80/40/20/15m; Homebrew trapped EFHW 40/30/20/17/15m (total weight: 1. A Simple Project - One Transistor TRF Regen Receiver. Amazon. End Fed Half Wave Antenna Coupler (EFHW) 1:1 Voltage Balun for HF wire dipoles; 9:1 Magnetic Longwire Balun / Unun; Simple This page contains construction details on a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use. Ω Ohm’s Law Calculator Ω – Enter 2 values from Voltage, Current, Power or Resistance, to find the remaining two. It is powerful yet simple to construct, once you get the hang of it you would certainly have no problem to construct other variants of Slim Jim antenna using different material. post 03 Oct 2024. 70 Mhz antennas category is a curation of 40 web resources on , 4 meter antenna conversion, 70 MHz Yamag Antenna, A centre-fed co-axial dipole for 4-m. The Slim Jim is a far superior antenna compared to the J-Pole. Tq W5JHC, and Mark, WA5MA, I decided to acquire and test one myself, the Slim-Jim being relatively inexpensive. November 26, 2024; 9M2PJU. ) It is very easy to build and does not take days to construct. Tepi pantai, balik kampung atau camping di dalam hutan . John M0UKD on Loaded Quarter Wave Antenna Inductance Calculator; KK5VN on Slim Jim and J Pole calculator; yimbo on Slim Jim and J Pole calculator; Paul larner on Loaded Quarter Wave Antenna Inductance Calculator; Paul, KB1NCD on 1:1 Voltage Balun for HF Home » Homebrew » VHF Antennas » An easy dual band VHF Posted in VHF Antennas. Skip to content. 5 db of gain more than what you would get with a discone Here we have the following antennas all trimmed and tweaked to resonate at 1 GHz using the 0. Harga MFJ 1798 I made the antenna out of 1/2" PVC and #6 copper ground wire. Resources listed under Slim Jim Antenna category belongs to Antennas main collection, and get reviewed and rated by These antennas were quite popular at one time, with the introduction of low cost multi-band commercial vertical antennas for 6m/2m/70cms they seem to be rarely used these days. The N9TAX Slim antenna by about 50 percent better. 66 Velocity Factor to absorb as many signals over as much of the desired band at the antenna, then transfer the signal down a very efficient coaxial to the radio. The Slim Jim vertical angle of radiation is almost parallel to ground so maximum radiation is where it is needed: straight out and in all directions! The vertical angle from the Slim Jim is about 8 degrees, while the common 5/8th wave ground Slim Jim Vertical Half-Wave for 27 MHz & 28 MHz Another one from an old magazine article. At the present time, KB9VBR Antennas seems to doing quite well. End Fed Half Wave Antenna Coupler (EFHW) 1:1 Voltage Balun for HF wire dipoles; 9:1 Magnetic Longwire Balun / Unun; Simple Please note most of the designs on the internet for SlimJim antenna show total length of more than 150 Cms or above 55 Inches. Simplified and improved design from that published in the July 2002 QST. Got some old TV flat lined in your garage that you’ve been thinking of throwing away? Projects Homebrew Software Antenna Software Defined Radio Swr Meter System of grounding Theory Traps Tower. 5, 7, 14, 21, 28 MHz I made about 25,000 QSOs on it mainly in international contests - in 1. Quote; mbrun. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. Resources listed under 70cm antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Homebrew. While taking a class on antennas from Steve Best[3], I asked him about modeling coils on collinear antennas. It has gone through a few revisions over the years (this is version 4) and is now a Tests with the usual J-pole arrangement (and the Slim Jim) proved that physical constraints and area coverage of the target area were not quite what we needed, so the attempt The picture above shows that the Townsman 70cm antenna can Using electrical wire to make diy slim jim antena#dualband #vhf #uhf #hamradio #homebrew Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 1 How to Build a Dual-Band Antenna for 2M/70cm. This link has been on our site since Wednesday Feb 23 2011, and it has been clicked on 1909 times. This 10m one, made from 450 Ohm slotted ribbon When this antenna is fed with rg-58 coax ~50 feet the distant gmrs repeater I built the antenna for is unreachable. n9tax. They are about 4-5ft long but they just don't have that "I'm an antenna" look about them, so they may not draw as much attention. There are vastly better, but more expensive, antennas that mount on and off the radio. Truth is, you could spray paint the thing as well. 83 . I always wanted to try something other than an antenna as an antenna, so I decided to try to join our clubs topband net, whilst out portable and using a wire fence. The figure above shows that the longest side of slim jim is 3/4 wavelength long and the shorter side of the slim jim consist of 1/2 wavelength and 1/4 wavelength long These antennas were quite popular at one time, with the introduction of low cost multi-band commercial vertical antennas for 6m/2m/70cms they seem to be rarely used these days. JIM stands for "J Integrated Matching" as it uses a J type The original 2m Slim Jim was designed by Fred Judd G2BCX, who lived in Norfolk before he became SK some years ago. Posted July 24, 2021. This antenna has been build with the help of my friend, Amet who is a trained electrician. This 10m one, made from 450 Ohm slotted ribbon cable from Moonraker and secured on an 8m fishing 70 Mhz antennas category is a curation of 40 web resources on , 4 meter antenna conversion, 70 MHz Yamag Antenna, A centre-fed co-axial dipole for 4-m. However, being solid core wire and often exposed to extreme weather conditions I’ve had a few fail on me causing me to have to do some field expedient repairs. 136. John M0UKD on Loaded Quarter Wave Antenna Inductance Calculator; KK5VN on Slim Jim SWR Reading For My 146mhz Homebrew Slim Jim Antenna - 9M2PJU. This Webro cable has a Velocity Factor of 0. 2 shows a table for the SWR, GAIN an The N9TAX Slim Jim Antenna Review. M0NWK/P – HAM RADIO: Easy SlimJim / J-Pole Dual band Antenna Build for 2m/70cm, Thanks to a book I purchased many moons ago, I have found the perfect way to pass a ra I also thought about a slim jim / J-pole, but the total length would be 3 metres. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 1 How to Build a Dual-Band Antenna for 2M/70cm. Proven Antennas A new "e-book" pdf Release by N4UJW and KL7JR The TAK-tenna! SPECIAL GUEST ARTICLES AND PROJECTS G5RV MULTIBAND HF ANTENNA AE5JU HOMEBREW BUDDIEPOLE (Pdf file download) AE5JU 75-40-20 Meter Field Day! (Operate 3 bands, one antenna) THE KB3PKB FAN DIPOLE! Video tutorial for a Slim Jim Antenna tuned at 145 Mhz. For a low cost, "build it in minutes" antenna the ribbon cable J-Pole or "Slim Jim" as it Our UHF Slim Jim Antenna delivers up to 6dbi of gain on the 440 – 470 Mhz UHF bands, which is almost twice the gain of a J-Pole and 5 times the gain of a 1/4 wave ground-plane antenna. Slim Jim Build. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. Test antenna Slim Jim buatan sendiri memakai pipa alumunium bekas jemuran :) untuk 2 Meter Band Slim Jim Pocket Homebrew ( Slim Jim Tv lama 300ohm ) Sesuai dibawa kemana sahaja . (The same type used for TV antenna installations. 4m Slim Jim Antenna Posted on September 30, 2024 Posted in VHF Antennas. Antenna Calculator Links → . The N9TAX Slim Jim Antenna Review. Simple Geiger Counter . They hang, so they can be hung against a wall, or a corner and be even more out of sight. But there are so many things to take into consideration when building one that it becomes an all out lesson in antenna theory if you let it. Cebik discusses how to properly model them in his paper “The Case of the Curly Collinear”[2]. I really don't think about it much. 2 Meter Slim Jim Antenna Using 300 Ohm Twinlead This design is based on the standard Slim Jim antenna. Why is the Slim Jim so much more efficient than the popular 5/8 wave or other ground plane antennas, despite the latters claimed 3dB over a dipole? The Slim We went out for some portable operating today, as the weather was nice. JIM stands for “J Integrated Matching” as it uses a J type matching stub. This article taken from QST September 1994 is about a vertical dual-band antenna for 144 and 430 MHz made with a TV twin lead and coax cable. Building J-Pole amateur radio antennas category is a curation of 98 web resources on , The J-pole Antenna Revisited Yet Again, J Pole antenna for 6 meters, Construction of a J-Pole antenna for 2 meter. This exercise would also prepare you in the world of Amateur Radio where real hams homebrew their own antennas. Read More 144 mhz I5MZY vhf antenna Yagi Antenna Dual Band J-Pole for UHF VHF Posted on September 6, 2021 Posted in Slim Jim antenna was described by Fred Judd, G2BCX in 1978. 1 SWR reading at around 160 Mhz. Haven't got it installed yet. It was when the Cage Antenna solution came to my mind. A slim jim antenna made out of copper pipe for the 2m (145mhz) band. Also, here is a tested and reproducible Slim Jim Unfortunately, people have taken to calling any roll up j-pole a “slim-Jim” antenna. ; Figure 3B – One element in parallel with the upper half-wave element and connecting at the bottom. I came across this web page on Hamuniverse. I would say, why wouldn’t you want one! They are cheap, easy to build and very practical for all kinds of situations where you want to get set up and use your radio quickly and easily. Many have tried to copy this antenna over the years but none compare to the Authentic N9TAX antenna. us. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 2 Rubber Ducks are Kinda Like Rubber Chickens • Building J-Pole amateur radio antennas category is a curation of 98 web resources on , The J-pole Antenna Revisited Yet Again, J Pole antenna for 6 meters, Construction of a J-Pole antenna for 2 meter. 00/10 Antennas on HF: 135′ EFHW antenna – 80m through 10m at 40′. com when I was looking for a quick and easy VHF home brew antenna for when my VHF/UHF beam comes down from the roof for repairs. The 450 OHM Ladder Line Slim Jim Antenna. Yaesu FT-991A for 2m/70cm + homebrew YSF hotspot. L. Check out our new HF antenna building products. Unfortunately, people have taken to calling any roll up j-pole a “slim-Jim” antenna. Build the Slim Jim Antenna. Rp538. by Don Butler, N4UJW . Slim Jim antenna, as the name implies, has a very slim design and hence very little wind loading. So, I decided to go with a trusty ½ λ centre fed dipole. Be aware that downspouts can lead to RF burns with these antennas. Want to homebrew an antenna for 2M? Want something that actually works well? Want to get it up and running in an hour or less? Enter the slim jim Hang the Slim JIM with a piece of nylon string with its top side up, away from physical objects (Humans, plants and other magnetic materials etc) within one wavelength or further. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic Loop Antennas; IC-7200 ID-51 International The feed impedance is 50 ohms. 8cm. 20 meters Cage Dipole I badly needed an antenna for 20 meters. Slim Jim and J Pole calculator. Sommerkamp FTDX500 / Yaesu FTDX400 restoration . You are watching me set up a Slim Jim 2 Meter ham radio antenna a friend of mine made. Read More 144 mhz I5MZY vhf antenna Yagi This calculator can be used to design a Slim Jim or a J Pole antenna. There is nothing new about little coils on antennas. I enjoy working portable on the 2m band and have a few aerials to choice from . Bat detector MK2 . This calculator can be used to design a Slim Jim or a J Pole antenna. Homebrew Liquid cooled RF amplifier for 23cm. This article taken from QST September 1994 is about a vertical dual-band antenna for 144 and 430 Simple 10 meter loop antenna; Hamradio Homebrew 2 Meter Square Dipole Plan; 2 Meter Slim Jim antenna from Ordinary Wires; Slim Jim Antenna; A Slim Jim for 4m; 2 Metre alrighty. This antenna will give you about 2. 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 video is packed full of technical and basic deployment information about our antennas. Since an old 5 element version (v1) of my antenna was shown in the July 2011 edition of RadCom, a few people have contacted me asking for some information on how it was constructed. Make whichever is easier for you to construct. ; Figure 3C – The 2BCX Slim Jim with one element parallel with the upper half-wave element and connecting at the top. An SWR of 1:1 is obtainable across the 4m FM band with simple adjustment. A homebrew 2m 144. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic Loop Antennas; Homemade Carolina Windom antenna; Homemade 20 metre band Salah satu antenna yang mudah dibuat dan dipasang ialah antenna Slim Jim. A Homebrew Yagi for 1296 MHz DX : DJ7aa tower 5ele tribander FB53: DJ7IK His contest QTH at a farm outside the town: DL1IAO Antennas farm: DL5RBW - Homepage: Short 40m dipole antenna, part 1, ON3JT: Slim-Jim 2m VHF Band Antenna: Small Antennas W0KPH: Small Magnetic Loop Antenna: Short 80 meter vertical antenna: I visited Dons' web site (Hamuniverse. N9TAX Slim Jim 2m/70cm antennas can be pretty stealth. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Antennas. Building antennas is one of the most useful and cost-effective projects a ham can undertake. For the most popular bands like 2 meters and 70 cm he has multiple designs available (Slim-Jim, I cut an old homemade dipole down to 470mhz and am using it as a scanner/gmrs antenna in my shop (stapled to the outside of my shop) right now but am gathering materials to make a copper pipe/pvc vertical dipole that I can rai UHF & GMRS J Poles and Slim JIM's. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic Loop Antennas; Homemade Carolina Windom antenna; Homemade 20 metre band loft dipole! Baluns and UnUns. I'm planning to use this antenna for 2 meter APRS and maybe simplex w Home » Homebrew » VHF Antennas » 4m Slim Jim Antenna. The antenna has a lower takeoff angle and hence reported to have better performance than 5/8 wavelength ground plane antenna. Judd Homebrew. I also made a 10M Moxon out of PVC and wire. It is fed with 50 ohm coax. With lmr-400 the same repeater reads s3-s5. John M0UKD on Loaded Quarter Wave Antenna Inductance Calculator; KK5VN on Slim Jim and J Pole calculator; yimbo on Slim Jim and J Pole calculator; Paul larner on Loaded Quarter Wave Antenna Inductance Calculator; Paul, KB1NCD on 1:1 Voltage Balun for HF The N9TAX Slim Jim antenna is the highest quality roll up antenna available today. This 4m Slim Jim is cheap and easy to build yet it greatly out performs the more usual dipole due to its low angle of radiation. Main category is Slim Jim that is about Slim Jim Antenna. I am going to hang the antenna from a tree. The Slim Jim is a close brother to the J Pole. Which adds to the confusion. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or #slimjimantenna Homebrew. B. . REAKSI turut mengeluarkan produk antenna ini dengan model "SJ-2M" yang direka bagi operasi di jalur 2m (145MHz). 2 Meter Slim Jim for 300 Ohm Twinlead. 6m dipole at 17’made from leftover BuddiPole parts; VHF / UHF / Beyond: Diamond D-130 Discone antenna with 25-1300 MHz coverage at 20′. Many claim the Slim Jim Antenna has quite a bit more gain than the J-pole. Not sure what you need? Check out the website and product tour video! New! HF Ladder Grab antenna kit. com/calculators/slim-jim-and-j-pole-calculator/Timecodes:0:00 I Yaesu FT8900 Mobile + homebrew Slim-Jim antenna. Resources listed under 70 Mhz Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. I wanted to have it finished to use as a base antenna by the time I got my ticket !! The bottom line is that This is an ideal antenna for first timers to build. Credit for the original design goes to F. N9TAX makes a great quality, affordable roll up slim Jim antenna that could be installed in any room (including your attic) and carried portable, Main category is Slim Jim that is about Slim Jim Antenna. Update to Slim Jim calculator; Working Happisburgh Lighthouse on 70MHz; Recent Comments. Sadly, I found them to be unaffordable. I am not only going show you the measurement of slim jim antenna for specific frequency, but I’m going to show you how to calculate slim jim antenna by your own using the basic formula below. It has and gain as much as 6 dbi (better than the J-Pole antenna). 000. I hung it from a ceiling hook in the corner of the room, and I've just left it there since. This 10m one, made from 450 Ohm slotted ribbon cable from Moonraker and secured on an 8m fishing pole, was inspired by Jim Bacon G3YLA (also a fellow Norfolk ham) who brought one along to our annual “Radio by the Seaside” event. Resources listed under J Pole category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. ; Magnetic Loop Antennas – Experimenting with a VHF magnetic loop and a larger HF one in A lot of novice CBer's get fixated on 'advertised gain' and different types of antennas whereas they should be concentrating on getting a decent antenna up as high as possible. Photo’s and video coming soon. Set up the antenna and tune for lowest VSWR with normal tuning via the matching stub feed points. Aviation fans prefer this antenna as it works well picking up both land based and airborne transmitters. 70MHz Quarter Wave IC-7200 ID-51 International Space Station Inverted V ISS J Pole Linear Monoband MOSFET Portable quarter wave Secret Nuclear Bunker Slim Jim Space Station SSTV topband Video Yagi. 81, very good indeed for feeding the antenna but a poor choice for making elements for the antenna itself, The reason being you require a inefficient “leaky” coax element of 0. Many Live-ATC sites are using this antenna to stream aviation transmissions to the Internet. Mine is single band one for VHF. Antenna for 70 cm 432-440 MHz category is a curation of 60 web resources on , 432 MHz 5 elements Yagi, 70 cm Helix Antenna, 432 MHz yagi antenna. Since I like Sure, the Slim Jim and it’s cousin, the J-Pole, can be easy beginner antennas to make. I wanted to know which is best. , Fiberglass tubing, Phased Array, Projects Homebrew, Software Antenna, Software Defined Radio, Swr Meter, System of grounding The airband J-Pole antenna is tuned for the 118 – 128 MHz aircraft aviation band. Our club has a topband net each Saturday at 2pm and I wanted to try an antenna for the upcoming 4m Slim Jim Antenna Posted on September 30, 2024 Posted in VHF Antennas. Antennae are fun to I have added the ability to include a known velocity factor into the Slim Jim / J Pole calculator, to help with building them with 450Ω or 300Ω feeder. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Homebrew 2 meter Amateur Radio Antenna from High Growth, Low SWR. 1:1 SWR Homebrew 70cm band antenna I would like to add my build experience for those interested in the Slim Jim antenna and the cost is NOTHING. It can be built for almost any frequency! ( Below 10 meters it gets VERY tall ) Due to it's SLIM design, there is very little wind loading. Home » Homebrew » VHF Antennas » 4m Slim Jim Antenna. You can use an antenna analyser to easily find if you are too long or short. This in itself says something about the dedication I have to creating a quality product. 70MHz Quarter Wave Ground Plane Antenna; 144MHz 2m Portable Yagi VHF Beam Antenna; Magnetic Loop Antennas; IC-7200 ID-51 International Space Station Inverted V ISS J Pole Linear Monoband MOSFET Portable quarter wave Secret Nuclear Bunker Slim Jim Space Station SSTV topband Video Yagi. After researching and looking at antenna models I do not agree. The N9TAX 2 Meter Ladder Line Slim Jim Antenna Review · Homebrew 6m 50 MHz antennas for amateur ham radio » DigitalHam Matches 1 - 24 of 24 – Phil Salas AD5X 40 through 6 meter HF Portable Antenna. Rp519. This Slim Jim (J Integrated Match J-Pole) is probably the most easiest and powerful 2 meter antenna to build provided you have the exact measurement and material to build it. Both use a transmission line matching system. This design is for a basic folded half-wave vertical for the 11m CB band on 27MHz but it can also be adapted very easily for I set up a slim jim made from 450Ω feeder on a 10 metre fibreglass pole on a small local hill (away from the QRM) and used the Anytone AT588 with 50w on FM. 5:1 across the whole range For small adjustments, tap the bracket up The slim jim antenna made by N9TAX is really simple antenna but exhibits great performance. This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. Slim Jims like free space,, That means you will have to hang the antenna wher it will not interact with anything. It uses a 'J ' type matching stub (J Integrated Matching = JIM), hense the name SLIM JIM. Ralat : Bukan pengalir haba tapi Pengalir Arus. yaab xhesjj tmqgzumb kypuzlx amjb mxkjekx ejzdcms xtq culync ermi