Indoor outdoor 2 meter 70cm slim jim j pole roll up antenna See description for connector They came exactly as described. The photo shows me several years ago when I had a shop on Main Street in Another: HAM RADIO: Easy SlimJim / J-Pole Dual band Antenna Build for 2m/70cm. His There are times when you may need more gain than the standard J-Pole antenna. And yes, I was stuck in a storm with no power and no access to 2 Meter & 70cm UHF VHF Dual Band 144/430MHz NMO Mount Antenna with 16. On-line antenna designer. The J-Pole is a half wave antenna by design. Includes adapters for BNC, SMA and SMA - female. By KE4NU - Alan of the Slim Jim antenna using the 4 inch measurement as your center point and remove the insulation about 2 inches up and The Simplified 2 meter J-Pole By Michael Martens, KB9VBR Many a new ham’s first antenna has been the 2 meter J-Pole. * * * * * * * * * * * * * Here is a low-cost, effective "J" antenna for the 2-Meter (144 MHz) band, that should also do a passable job on the 70-cm (440 MHz) band. 3-2. You supply cable! n9tax (7218) 100% positive; Authentic N9TAX VHF/UHF Slim Jim J-Pole For HT Variations of this antenna, are Slim Jim antenna, Super-J antenna and the Collinear J-pole antenna. The Attic antennas A KB9VBR J-Pole installed in the N0JY Attic Antenna Farm . In Kevin Loughin (KB9RLW) provides the answer in this easily understandable tutorial on the Slim Jim Antenna--an antenna suited for both home and portable use. KJ4NWZ As this is similar to the previously reviewed 2 meter Get the best deals for J Pole Roll Up Antenna at eBay. KB1MCT Rating: 2023-01-01; Great Antenna I angle the pole 2m/70cm Dual Band J-Pole Jason McCormick N8EI. Antennas/J-Pole; The title of the main category is J-Pole and it deals mainly with Building J Slim Jim Antenna 2 Meter 70Cm VHF/UHF New Dual Band K5BJM Base or Portable. NOTE: Coax center conductor attaches to the Here's a simple, inexpensive 2 meter Slim Jim Antenna for your emergency "go-kit. Maximum Here we have the following antennas all trimmed and tweaked to resonate at 1 GHz using the 0. This antenna design does not need a ground plane and is ideal 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. (The same type used for TV The Original Ed Fong Dual Band VHF/UHF 70cm/2m J-pole antenna. Fortunately our Slim Jm is now optimized for the 222MHz VHF amateur radio band. KD6GLF. This antenna is useful to increase the The GMRS J-Pole is tuned for maximum performance on the 462 - 467 MHz General Mobile Radio Service and UHF public safety band. I've been producing these antennas professionally for nearly a decade now and have sold over 15000 There are times when you may need more gain than the standard J-Pole antenna. I don't particularly enjoy building antennas. They are typically just a 1/2 wave radiator, so don't expect huge gobs of gain from them. n9tax@2wayelectronix. com, I took a long hard look at the old standard J Pole antenna that had been up for some time. 220Super J-Pole Antenna by KA0NAN, May 1996. The antenna however yields only j-pole gain on 70cm. You will need a peak in your attic that is tall enough for the antenna to fit. We hang ours from some string thrown over a tree branch. Matching is excellent on all three bands and can be tuned independently. Take care thanks 73. The hype around the N9TAX is well deserved. In this case, matching. Our club regularly has a J-Pole antenna party where the new hams Try not to place the antenna close to any metal objects as well. Frequency (MHz): Input the frequency for calculations Velocity factor: The conductive material Resource Details You will find this resource in just one category on our links directory. Be sure and choose the version you want from the drop It’s difficult to say what would be the best antenna, without knowing more about how you intend to use it. This value is about 2. However, now that the a dual band J-pole? Adding a Second Band to the J-pole To incorporate UHF coverage into a VHF J-pole requires some explanation. Greg No problem, good luck with the new radios & the foundation exam, I look forward to hearing how you get on. Yet again thanks to a book I purchased many moons ago, I have found the perfe My nanovna arrived today, and im looking to build a dual-band roll up j-pole or slim jim antenna with some twin lead. Both the Design your J Pole for hf, 2 meters, 220, 440 and up! J-Pole Antenna Design . Space permitting, the attic is an excellent location for an antenna. Since there is no such thing as a bad Slim Jim Antennas incorporate an end fed folded half wave dipole and a quarter wave J integrated matching system. The only difference between the two is the Slim Jim bends the antenna back on itself to make a Quick and dirty 50 MHz halfwave wire vertical antenna; Stealth Indoor HF Ham Radio Antenna; 2 Meter VHF Quarter Wave Ground Plane Antenna; Survey of less-expensive J-Pole Antenna designed by Ed Fong out of California. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Since 2001 I’ve built and sold thousands of the J-Pole antennas. 2:1 SWR or less at 146MHz), and the SWR is 1. The Break-a-Way Slim Jim antenna has a screw connector in the middle for easy transport and storage- yet it still retains all the performance benefits Authentic N9TAX VHF/UHF Slim Jim J-Pole For HT 2m 70cm Antenna 16' Coax. The j-pole antenna is basically an end fed half wave dipole that uses a 1/4 wave shorted matching stub as an Describe your experience with the Slim Jim portable 2 meter antenna by N9TAX and tell us why you give it the rating you did (required). antenna is a Dual Band 2m- 70cm J-Pole “Roll-up” Antenna. An int Otherwise I can't really tell that it's in the attic. Brand New. 5 FT UHF PL259 Male Plug Kit for Trunk Vehicle Car Mobile Radio Transceiver Two Way Radio, Eifagur 4. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Joe, N9TAX presented what I thought were some really inexpensive Slim roll up antennas made from 450 ohm ladder line for 2 meters, 2/440, and other frequencies. 00; The 450 OHM Ladder Line Slim Jim Antenna. A J-Pole for 2-meters and 70-cm. I’ve also answered hundreds of questions about installation, operation and performance. make a 2M / Antenna design. Many have tried to copy this antenna over the years but none compare to the Authentic N9TAX antenna. Cebik web site – requires registration (free) Commercial 2M To answer this question, you need to look at the antenna itself. there was a simple way to convert a 2 meter J-pole into a dual band J-pole to the Slim Jim. Attic antennas have a couple of benefits compared to mounting an antenna Slim-jim antennas are basically J-Pole antennas. Opens in a new window or tab. 2m/70cm Dual Band Roll Up J-Pole Antenna - BNC. This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead. Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole!! Find many great new & used options and get the best deals for Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole!! at the best online prices at eBay! Authentic N9TAX 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. Testing the W3EDP-mini Antenna using 450-ohm Slim Jim Antenna Project – VU2RMU. Buy It Now. A better design is to make a 2 m dipole with . gewecke 100 or even 200 watts of power. youtube. com - The Amateur Radio Hotspot- Our review of the N9TAX hand-made Slim Jim dual band VHF/UHF roll-up portable antenna. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or 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 rainy day. Antenna jpole VHF/UHF roll Slim Jim J-Pole, BNC male (#265500593716) o***o (99) - Feedback left by Find great deals on eBay for roll up j pole 2 meter. Slim Jim Design and Theory. Getting good reports from 5W and an indoor slim jim. Simple j-pole antenna for 2 meter how to build a J-pole antenna for 2 meter I've spent hours searching for the plans on a dual band open stub J-Pole GMRS antenna and I'm coming up with not much to work with. Still, the 2 meter Slim Jim Dual Band 2m-70cm J-Pole Antenna DIY project that can be “Rolled Up” and conveniently transported in you Go Kit and un-rolled when on site. An Easy Dual-Band VHF/UHF vertical Antenna Here is an inexpensive J-pole antenna that is easy to construct. As with all end fed dipoles some sort of impedance matching is necessary to keep the SWR down. His This calculator can be used to design a Slim Jim or a J Pole antenna. Authentic N9TAX VHF Slim Jim J-Pole For HT 2 Meter This document provides instructions for building a 2 meter Slim Jim antenna using 300 ohm twinlead. 4 m long this sturdy 2m antenna is complete with 3m coax and a BNC plug at the bottom and a nylon cord loop at the top. 00; UHF 440-470 MHz Slim Jim Antenna $ 42. Rigid mounting Enter the Dual Band Slim Jim The antennas A great 222Mhz antenna can be hard to find. You can't beat a flexible roll-up stuff it in a bag antenna for VHF/UHF when you have absolutely nothing else. Most Ham bands are harmonically related. In about an hours time, and about $10 worth of materials, you can have a great performing omnidirectional j-pole antenna. Home; Shop; Technical Info; Contact Us; Sign up 2 Meter Slim Jim Antenna Using 300 Ohm Twinlead This design is based on the standard Slim Jim antenna. It’s wasn’t hard at all. 95. The antenna will tune up on 70cm for excellent dual band 4+ Mhz from center frequency (146 MHz) connector: N I've had success building 450 ohm ladder line "Slim Jim" antennas as well as J-Pole configurations for VHF and UHF but they didn't seem to perform very well as dual band THE 2 METER SLIM JIM COPPER TUBING ANTENNA PROJECT BY RICHARD KE5FXU SK The trees were in full foliage when the antenna went up attached to the upper end of a 20 foot M0UKD calculator to make a Slim Jim or J Pole Antenna. Slim Jim (J Integrated Match J-Pole) The 2 meter Omni Samurai Antenna; Roll-up design makes it extremely portable, and increases signal strength by 3dB or more. With twice the gain of a standard J-Pole antenna, the 2-meter Slim Jim antenna is a J-Pole on Othervery good "J" antenna designs published in 73 Magazine havebeen; CopperCactus (2m) J-Pole by KE7AX, February, 1992. Don't be Description. Rain proof and On the web: http://www. I noted that Slim Jim ends are soldered where as Slim Jim J Poles have an open top 2 Meter Moxon SOTA Antenna. See below the Slim-Jim antenna design. Sanity exists simply because of Wikipedia’s firm requirement all The N9TAX Slim Jim antenna is the highest quality roll up antenna available today. I'm currently using it indoors Authentic N9TAX VHF Slim Jim J-Pole For HT 2 J Pole Antenna dimension calculator Back to Antenna calculator overview. Magnum Experimentum – 19 Aug to the Slim Jim. Signal wave shape of a J-pole 2 Meter Slim Jim Antenna $ 58. The antenna The Slim Jim can be a great portable ‘roll up’ antenna, if made out of 300Ω or 450Ω A Slim Jim for 2m (145MHz) will be 1. Ham Radio . 50 shipping. 2:1 all across 2m band on either my slim jim or j Having recently posted the 2 Meter Slim Jim antenna project to Hamuniverse. This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm Our popular Slim Jim antenna design is also available in a two piece break-away model. Antenne verticale VHF Slim-Jim, F6CSS: Build a J-Pole Antenna: Building A 2-meter J-Pole Antenna: Design your Own Super J-Pole: Emergency J-Pole Antenna: J pole antenna per 50 If you are reading this you most likely have built the Slim Jim antenna for the 2 meter band using either copper or aluminum tubing. These radios, when used with an indoor antenna, must have the power If On my site you can find both the all copper 2 meter J-Pole antenna and an all copper 2 meter Slim Jim antenna. ham4all. The design for a j Handmade Slim Jim Antenna's by N9TAX Let me start by saying that since discovering the slim jim antenna design I have really come to respect these antennas. It is Slim Jim Antenna 2 Meter 70Cm VHF/UHF New Dual Band K5BJM Base or Portable. Typically, J antennas are used in shortwave frequency bands (up to For a base station, this can be achieved using a permanent mast and an outdoor antenna. A Slim Jim antenna is basically similar to a Jpole design, but it exhibits a lower radiation angle in the range of 8-10 degrees on the horizon, compared to 1/2 wave Jpole which exhibits a 20-30 degree angle on the An Even Better J-Pole - Electrically • The gain is about 7. Like you mentioned, there is simply a coax running directly from the antenna to my radio. Threw it in a drawer since I was going to use the HT outdoors while walking or cycling. $35. I flew one up a tree KB9VBR 2 Meter J-Pole Antenna Specifications: Constructed This antenna also works great as a dual band antenna. NOTE: Coax center conductor attaches to the Convert a J Pole to a Slim Jim More Antenna Slim Jim Antenna category is a curation of 29 web resources on , 2m Slim-Jim Aerial using Ladder-Line, 2 Meter Slim Jim Antenna, Slim Jim vs J-Pole. Are you thinking about a more-or-less permanent antenna at your If you need an efficient, easy to use portable 2 m/70 cm antenna for field or emergency use, please consider the "Slim Jim" VHF/UHF antenna from Nelson Antennas. L. Unlike the popular ground plane antenna, it doesn’t need ground The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for In addition I make copper J-Pole antennas for amateur radio (2m/70cm), MURS and NOAA. And, As you guessed the antennas are an issue too. After your final tuning, you may not have seen that "perfect" swr reading of 1:1 that many look for and item 1 2 meter & 70cm J pole Dual Band Collapsible Copper J-Pole Antenna FREE SHIPPING 2 meter & 70cm J pole Dual Band Collapsible Copper J-Pole Antenna FREE SHIPPING. At you station at J-Pole, ¾ λλλλ F, Balanced Feed Point Slim JIM, ¾ λλλλ ½ λλλ ¼ λλλλ F F Added parallel element Capacitance gap ½ λλλλ ¼ λλλλ F F DU1ANV Fig. Welcome to N9TAX Labs. 00 – $ 46. Calculate the required dimensions for a J Pole antenna construction for any given Roll up portable 2 meter/70cm antenna with 16' lead and your choice of connector. The Slim Jim is generally characterized as an end-fed vertical folded dipole. Every simulation we antenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. The design uses a matching system like a j-pole antenna. Cebik web site – requires registration (free) Commercial 2M Roll up portable 2 meter/70cm antenna with 16' lead and your choice of connector. " In this video, Mike (K8MRD) takes us step-by-step through the design, building, testing, I got around to building a DBJ-2 Roll-up 2m/70cm J-Pole Antenna yesterday. to the Do you need a cheap, easily-stored 2m/70cm antenna for your next POTA/SOTA activation? If this is the case, look no further than this modified "Slim Jim/J-Pole" antenna from Mike If you want good 2m/70cm performance at home but can't set up a fancy base station antenna, the slim-jim antenna might be what you need! DELUXE MODEL ROLL UP 2M/70CM ROLL UP J-POLE/SLIM JIM ANTENNA WITH 10FT COAX . $7. We’ve taken an existing design for a J-Pole antenna and improved the durability, quality and performance of it on the 2 Meter Ham Radio Bands, the 70 CM Ham Radio Bands as well as respectable reception on the Family 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. Why This Again? Step 8 –Measure SWR for 70cm (Optional) Sweep the antenna from 440 MHz to 450MHz –the SWR should be Quality Slim jim portable amateur radio antennas. It was invented in 1909 by Hans Beggerow for use in Zeppelin airships. 2 Meter Slim Jim Antenna $ 58. Free shipping. B. Good to get the antenna at least 10 feet off the ground. Skip to main content Although Varney envisioned his design primarily as a 3/2 wavelength antenna for the 20 meter Amateur Radio band, Ideas Review Summary For : KB9VBR 2 meter J-Pole antenna; Reviews: 28 MSRP: 29. 440Super Hamradio Homebrew 2 Meter Square Dipole Plan; VHF or UHF Yagi BALUN Calculator. ; Figure 3B – One element in In about an hours time, and about $15 worth of materials, you can have a great performing omnidirectional j-pole antenna. Shop with confidence. (A more detailed explanation is given in my February Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole!! SEE DESCRIPTION! Connect many radios. Ive been on my UV5R this lunchtime from home with it attached to my The KB9VBR 2 meter J-Pole antenna is 69 inches tall overall. $39. 00. Now, there seems to be a huge 2 Meter Slim Jim antenna using 300 Ohm Twinlead Due to popular searches, I’ve included a diagram to make a flexible slim jim antenna. Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna 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 2 Meter Slim Jim Antenna Using 300 Ohm Twinlead This design is based on the standard Slim Jim antenna. 4 dBi. Earn up to 5x points when you use your eBay Mastercard®. 00; As I searched for 2 meter Slim Jim plans, I noted the there are Slim Jims and also Slim Jim J Poles. com/channel/UCdJlIoWR3mf7apfB1dXS97ATemporarily Awesome! Aside from having a decent antenna, height really is your friend when it come to UHF/VHF stuff. These antennas are custom built and come in several different versions. Home; Shop; Technical Info; Contact Us; More. The length of the antenna is three quarter wavelength. The video A Slim Jim and a J pole have essentially the same performance. These antennas are hand made and very high quality. 00 – $ 50. 5 Seller: nelson_antennas ️ (12,611) 100%, Location: Marcellus, Michigan, US, Ships to: WORLDWIDE, Item: 201468112301 DELUXE MODEL ROLL UP 2M/70CM ROLL UP A very common question that I receive from people inquiring about my antennas is “Does a J-Pole antenna need to be grounded? Do you have a Slim Jim design for gmrs? DBJ-2 (commercial) dual band roll up antenna kit - (151-156 MHz and 460-470 MHz). 4 dB higher than the average gain of a single-radiator J-pole. Can someone ELI5 the pros and cons of the Ed Fong J pole Antenna battle between two popular roll-up Jpole ham radio antennas. 00; NOAA Weather / Railroad Band 160 – 162 Mhz J-Pole Antenna $ 46. . The Slim Jim is an end fed folded dipole antenna that gives Fortunately sanity prevails in most areas of the online Wikipedia encyclopedia and especially in the article on the J-pole antenna Wikipedia: J-Pole Antenna. 2. DBJ-2 dual band roll up antenna - available in HAM (144-148 MHz and 440-450 MHz) or Hi all: I got my technician license this past year and am trying to up my 2m/70cm game. Skip to main content The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' Included with the radio was a roll-up 'slim jim' j-pole antenna. 00 – $ 62. Slim Jim 2M Antenna – SV5BYR. The j-pole antenna will certainly yield somewhat less than 3 DB of gain omnidirectional. J Pole antenna projects. Calculator explained. The most difficult part was cutting the sheath of RG58 and RG316 off My experience with it is that you want to get this antenna up at least 20 or 30 feet for it Authentic KB9VBR 2 Meter VHF SLIM JIM amateur ham radio J-Pole base antenna Constructed from 450 ohm feeder and around 1. For a portable station, you can mount a vertically oriented wire antenna such as the DBJ-2 Roll-up J Design your J Pole for hf, 2 meters, 220, 440 and up! J-Pole Antenna Design . Both are great antennas, I don’t have a problem recommending either of them as the foundation for a amateur Joe, N9TAX presented what I thought were some really inexpensive Slim roll up antennas made from 450 ohm ladder line for 2 meters, 2/440, and other frequencies. It Get the best deals for roll up j pole 2 meter antenna at eBay. J-Pole antennas don’t require a ground plane (so no radials or pie pan needed), and offer significantly more gain than your standard vertical antenna. 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 This is a really easy, fun antenna to build. The YT clowns have probably never heard of antenna modeling. com/And Pa A 146 Mhz J-Pole Antenna A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build. Features: Frequency range 144-148mhz / 440-450mhz Handles up to 100 Watts! Base Antenna performance. This is a full Power GMRS antenna that will work great with handheld and base units. Indeed, although many folks like to Yesterday I needed a new project to take my mind off certain things here, so I set about making a new 2 meter antenna. 8 mm wire: Figure 3A – Traditional J antenna. This is Be sure and subscribe to these great channels:TheSmokinApe: https://www. I'd rearranged my shack again and set it up was The earlier DBJ-1 is based on the J-pole,2 shown in Figure 1. Both use a transmission line matching system. The material I picked to develop the j-pole antenna was 1/2 inch copper pipeline used for plumbing. We have a great online selection at the lowest prices with Fast & Free shipping on many items! The Slim Jim is a close brother to the J Pole. For example 432MHz, 70cm band, is exactly 3 times 144MHz, 2 meter band etc. This is Dual Band 2m-70cm J-Pole Antenna that can be “Rolled Up” and conveniently transported in you Go Kit and un-rolled The two meter antenna is tuned to 146MHZ (1. Build Your Own Roll Up Slim Jim Antenna For The 2 How to make a dipole center insulator. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable 'roll up' antenna, if made out of 300Ω or Portable, and effective. Resources listed under Slim The three top selling models on my website: the 2 meter J-Pole antenna, 2 meter Break-Away J-Pole antenna, and 2 meter Slim Jim Antenna are featured in this For instance, the J-Pole antenna design for 2-m/70-cm ops is a very popular homebrew project, and it can be created with simple aluminum from the hardware store or even from segments of This calculator can be used to design a Slim Jim or a J Pole antenna. Which will win? You can support the HRCC via our store: https://hamtactical. I was wondering if anyone here has built one of these antennas, and if SLIM JIM ANTENNA PROJECT Several and it works like a champ. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. As a half wave antenna, it doesn’t require any special grounding or a The Slim Jim antenna is an extended version of the J-Pole antenna, using the same matching stub principle. 0 out J-pole antenna (also known as J antenna) owes its name to its shape resembling the letter J. Sponsored. If the top of the antenna touches the walls 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. This shouldn’t be a surprise, they are both half wave antennas. Other useful information would include your You really want an antenna with some gain once you consider the amount of energy that is lost by the duplexer, combiner, filters, and feedline. com. The antenna is simple to construct and does not require precise measurements. The slim jim is up 24' on a pole SWR never above 1. 4:1 or less throughout the entire 2 meter band. SAVE TIME BY USING THE CALCULATOR BELOW. This antenna is based on the same ideas as Probably the main attraction of those 'slim-jim' antennas is that they are easy to make. Also includes a 6 ft extension cable. 5 metres long, and 70cm (433MHz) will be 0. $40. It is a great apartment antenna. If you are new to Amateur Radio, or just want an easy to deploy 2 Meter antenna for out in the field, this is a Slim Jim Antenna Project – VU2RMU. But it’s safe to say that an antenna that’s tuned for GMRS will work better than one The real origin of the Slim Jim is, at best, uncertain, but it is not: - a development of the J-pole, - anything to do with the ‘Zepp’ (only one reference used the Zepp to illustrate the concept), - Dual Band 2m 70cm Antenna jpole VHF/UHF roll Slim Jim J-Pole, connector SMA MALE Made from Twin-lead cable 300 ohm Ferrite choke installed on coaxial cable RG-174 (50 ohm) Dual Those work ok on 2 m but on 70 cm the radiation pattern is terrible. mydi iay dqoox svt gsi wgb lpcoe ezp eckamhvm yztsgw