Diy Roll Up Slim Jim Antenna

Other RC Parts & Accs-1pc CW 20x8 Carbon Fiber Propeller For RC Fixed Gasoline Engine AF Wing Airplane nnmgtf1037-factory outlets - www. It is the same antenna that appears on the front cover of the ARRL VHF/UHF Antenna Classics Handbook. There are numerous other applications an antenna like this could be used for. This in itself says something about the dedication I have to creating a quality product. The Antenna Farm : VHF/UHF Dual Band - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Amplifiers Connectors Aviation Radios Repeater Systems Towers & Accessories Scanners & Receivers Duplexers Diplexers & Triplexers VHF. This Pin was discovered by Rob Wilson. Roll Up Slim Jim Antenna plans PDF Document; J-Pole. T he J pole is simply a half wave length vertical element with a folded quarter wave match stub. Two DIY dual band antenna's I built for VHF/UHF. 4 on 146 & 1. This page documents a build of a 2-element 1/2 wave collinear J-Pole performed by Harry, KC9EOT, and myself, KB8OJH. A roll up J-Pole provides a reasonable antenna that you can hang up in your hotel room. The design uses a matching system like a j-pole antenna. Another one to look at is the Cobweb antenna — 20-6 in an 8. This is my NEWEST deluxe model roll up Slim Jim/J-Pole antenna with 10' of coax! WHOLE ANTENNA IS 3 OUNCES and made to fit your rig! Are you looking for a truly portable antenna with BIG performance?. The J-Pole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. This month I decided to build a 2 meter 5/4 wave antenna. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. 6dB COLINEAR VHF ANTENNA by Harry Lythall - SM0VPO. Check out this AMATEUR RADIO VIDEO! In this video, I show you the N9TAX Slim Jim Dual Band Antenna 2m/70cm https://youtu. Hd Antenna Diy, Wifi Antenna, Home Projects, Simple Projects. This picture shows that the base of the antenna is mounted flush to the top of the mast. I like it because it is easy to build and has a very wide 2:1 SWR bandwidth, about 6% (142-150 MHz). Antenna now about 2. 125MHz Slim Jim I bought, so I want to step it up! There are many, many stories floating around the Internet about homebrew Slim Jim projects, but what strikes me is that everybody seems to arrive at different lengths for a 3/4 wave in the 144MHz band (where I find most Slim Jims), even allowing for differing propagation speeds in the. I would definitely do business with him again. Portune, W6NBC here made from a threaded table lamp tube, the lower part of the whip becomes the cen - ter conductor of a short length of rigid coax. To tune the antenna you would move the feed point up or down the open wire feeder, but I have made a few of these and found these dimensions give a good match. I had a problem with my packet radio station and decided that antenna gain was the solution. How to Build: Ham Radio 2 Meter Quarter Wave Antenna. Maximum power input 50 watts. 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. 7dB of gain*. A while back I purchased an Ed Fong dual band (2M/70CM) DBJ-2 antenna for field use. Find printable coupons for grocery and top brands. Antenna with BNC Male Connector. The design uses a matching system like a j-pole antenna. Mike Means. Every simulation we have done and physical DBJ-2 dual band roll up antenna - available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152. For $60, it better make toast and coffee. Are you looking for a UHF omni antenna with a little more gain? Our UHF Slim Jim Antenna delivers up to 6dbi of gain on the 440 - 470 Mhz UHF bands, which is almost twice the gain of a J-Pole and 5 times the gain of a 1/4 wave ground-plane antenna. Building J-Pole amateur radio antennas is a curation of 85 resources about , The J-pole Antenna Revisited Yet Again, J Pole antenna for 6 meters, Concealed DSS J-Pole, The Copper Cactus J-Pole, J-Pole Antenna for your Packet Radio Station. 5:1 or better over the entire band. It has a SWR of 1. This type of antenna is usually hung from a support and needs to be kept away. Ham Radio Antenna Computers Electric Ants. 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. It’s more for when I load the truck up, that way I’ll have options if I want to. The proposed antenna would be operational over the entire 6Mtr band (50 - 54MHz) and the entire 2Mtr band (144 - 148MHz), slightly favouring the upper half of both bands. This Pin was discovered by Geri. 6dB COLINEAR VHF ANTENNA by Harry Lythall - SM0VPO. I like it because it is easy to build and has a very wide 2:1 SWR bandwidth, about 6% (142-150 MHz). 125MHz Slim Jim I bought, so I want to step it up! There are many, many stories floating around the Internet about homebrew Slim Jim projects, but what strikes me is that everybody seems to arrive at different lengths for a 3/4 wave in the 144MHz band (where I find most Slim Jims), even allowing for differing propagation speeds in the. If carefully constructed you should be able to achieve a VSWR below 1. Yes, it can transmit and receive at greater ranges, but it will fry your radio faster too. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. A DIY directional wifi antenna A great DIY/tech project! With just a handful of cheap parts, a salvaged DirecTV dish and a little soldering, we were able to detect access points from over 8 miles away. 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. MADE IN USA WITH HIGH QUALITY COMPONENTS SLIM JIM ROLLUP ANTENNA The Slim Jim is a great portable 'roll up' antenna. This is my NEWEST deluxe model roll up Slim Jim/J-Pole antenna with 10' of coax! WHOLE ANTENNA IS 3 OUNCES and made to fit your rig! Are you looking for a truly portable antenna with BIG performance?. Homebrewed 2meter/70cm telescopic dipole - Homebrewed an adjustable dipole for use on the 2 meter and 70 cm bands that can easily break down to stow in any small pocket. This morning I try out a new antenna for the 2 meter ham radio band. For analysis of the antenna see VK3WAM’s post where Wayne used a MiniVNA Pro on the Slim Jim. Plus the antenna also…. How to replace power sliding door cables on 2004-2010 Toyota sienna. Why? Measurements, simulations, a college paper and Fred Judd’s own article suggest otherwise. Ed Fong DBJ-1 Dual Band UHF/VHF Antenna Assembly And Installation. The object of an antenna SYSTEM, is to deliver as much signal as possible to the antenna jack on the back of the radio at the frequency youre listening to. materials needed, since the antenna is al-ways at dc ground. A roll of 300 or 450 Ohm antenna wire was $55. by Stan Swan. 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. It's the construction of the Delta Loop antenna that is the subject of this post. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! Amateur Radio, Land Mobile, Scanner, Low Power FM, and Airband Antennas. Roll Up Slim Jim Antenna plans PDF Document; J-Pole. N9TAX Dual band slim jim portable antenna by 2way electronix product reviews by real people like you. A "Slim-Jim" antenna is quite popular but only realises about 1. INCLUDES 16 FEET OF RG58U LEED-IN COAX CABLE. and you do not want to SAW your weather stripping off your car. We call the antennas Slim Jims and they pack a lot of punch but do not unpack your wallet. In case you have a busy schedule that doesn't allow you to spend a lot of time shopping, you can place your order whenever it's convenient for you. It is the same antenna that appears on the front cover of the ARRL VHF/UHF Antenna Classics Handbook. 2m/70cm roll up j-pole/slim jim antenna Post by Wingfoot » Mon Jul 20, 2015 11:44 am My journey into ham radio continues & at the weekend we went into the hills of shropshire to camp out for a couple of nights along with my ham radio buddy & his partner. deluxe model roll up 2m/70cm roll up j-pole/slim jim antenna with 10ft coax. Many RASON members truly enjoyed last month's collinear antenna. Figure 2––This EZNEC plot shows the difference in the radiation patterns between a vertical half-wave radiator operated at its fundamental. I stumbled upon Nelson Antennas who were linked from a number of DIY antenna sites with hearty recommendations. ground plane antenna, it doesn't need ground The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service Edison Fong, WB6IQN WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed measurements of a practical, easy to replicate, "roll-up" portable antenna. The examples presented show how to make a portable “roll-up” antenna for your go-bag DIY VHF UHF Antenna for. Keep in mind that the SWR of a handheld antenna is *far* less stable than what you usually use with a mobile rig, so it will probably end up reducing its power automatically because it will inevitably have suboptimal SWR — this is the case with any handheld antenna except possibly some heavily loaded ducks or larger telescoping antennas. be/BdFTyfKuytM! DON'T FORGET TO SUBSCRIBE. I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. 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. Plus the antenna also…. It'll be a source of pride when you use it. 5/8 wave J-pole antenna for 145 MHz. 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. 2 - Roll up J-Pole/Slim Jim antenna. It is a roll up, J-Pole/Slim Jim antenna. I've found the DBJ2 to be a solid antenna. Higher is better. (DIY roll up Jpole) is easy to make. Portune, W6NBC here made from a threaded table lamp tube, the lower part of the whip becomes the cen - ter conductor of a short length of rigid coax. Or cut off the end of the connector from the Slim Jim harness and wire it directly the Sony grey box (external antenna connector)? That is if I get my hands on one. If anyone has any ideas or links for websites with some info on building your own indoor antenna please share Thank You and Best Regards Bill Make a "Slim-jim" (J-pole) from some twinlead/hookup wire. If you prefer different it is imperative that you message me the connector type immediately after ordering. About SWR; My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. The antenna components are shown in Figure 2. It must be placed as high as possible, properlymatched to the transmitter, and designed to effectively radiate the powerapplied to it. I have also seen a collapseable antenna that gave extremely high gain when fully extended to a ridiculously long (for an HT) full. Many RASON members truly enjoyed last month's collinear antenna. The Slim Jim antenna is similar to the J-Pole with increased RF energy at the horizon. This antenna gives you about twice the gain as a standard J-Pole and two S-Units over a ¼ WL vertical when compared for point to point line of sight work. This in itself says something about the dedication I have to creating a quality product. It is not particularly difficult to make a VHF antenna with omni-directional properties as well as having a 6dB gain*. 95: Authentic N9TAX VHF Slim Jim J Pole 2 Meter Antenna roll up jpole $20. It is the same antenna that appears on the front cover of the ARRL VHF/UHF Antenna Classics Handbook. A home brew DIY Delta Loop antenna. ground plane antenna, it doesn’t need ground The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service Edison Fong, WB6IQN WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed measurements of a practical, easy to replicate, “roll-up” portable antenna. Overall I give this antenna two thumbs up, and high recommendations for a fun project, and/or a great antenna that is easy to put up, with very little wind load, low SWR, and not too much an eye sore for the neighborhood. Homebrewed 2meter/70cm telescopic dipole - Homebrewed an adjustable dipole for use on the 2 meter and 70 cm bands that can easily break down to stow in any small pocket. Slim Jim of hookup wire on a PVC former. How To Build A Dipole Antenna. About SWR; My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. 2m / 70cm "roll up" antennas but it's a quick and easy DIY project. 2m Projects - Omnidirectional Antennas taking your HT bicycling is coming up with a decent antenna on your bicycle. Our flagship model, The Two Meter J-Pole Antenna comes in two different configurations, either as a one piece antenna for base station use, or as a two piece breakaway model great for portable operations. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. The stock A-V85 is a safe and effective enough antenna that is not too long and is cheap to replace, and performs much better than the other stock Baofeng antenna that are junk. Shop with confidence. For analysis of the antenna see VK3WAM's post where Wayne used a MiniVNA Pro on the Slim Jim. I defy you to buy the component parts on-line in the UK any cheaper. Very high quality, Sirio is well known for its aerials and accessories. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. VHF Band Antenna by 4S7NR Slim-Jim is easy. Figure 2––This EZNEC plot shows the difference in the radiation patterns between a vertical half-wave radiator operated at its fundamental. SlimJim design to provide about of gain over a wave. J-Pole Antenna Plans (printable PDF format) (800 kb) This is a flexible antenna that is easy to build, inexpensive and very handy to have in your emergency communications kit. A bit of chocolate melt to glue the round chocolate candy to about a 4 or 5 inch piece of Slim Jim. Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole!! #N9TAX See more. The 450 OHM Ladder Line 2M Slim Jim Antenna. It uses a matching system similar to j-pole antenna. I have a buddy that hangs a comet gp6 for more than three years and never had a prob, it has the small ground plane outward radials and works real good. But don't settle for just a HT as supplied by the manufacturer for your early ham radio experience. Small, Portable, Lightweight and VERY VERY effective. 145mm or nearly 6 inches in diameter (5 7/8''), which makes it perfectly adequate for CB aerials up to and including the Sirio Megawatt 4000 and similar sized amateur aerials. A Sim Jim Antenna based on 300 ohm ribbon cable. Details about Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole Ham Radio Antenna Radios Communication Band Electronics Homesteading Army Slim Ants Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole!!. I have been licensed fo almost 20 years now my original call was KB9FAR. have a deeper metal part and it wont go past seal around door. deluxe model roll up 2m/70cm roll up j-pole/slim jim antenna with 10ft coax. It's not my go-to antenna at home (that's a Diamond X30a mounted in the attic), but the DBJ2 has a place in my camping bag. I have a buddy that hangs a comet gp6 for more than three years and never had a prob, it has the small ground plane outward radials and works real good. Does the 2BCX Slim Jim antenna live up to the oft touted more gain or better takeoff angle over a traditional j-pole? Answer. Get verified coupon codes daily. The 450 OHM Ladder Line 2M Slim Jim Antenna. A "Slim-Jim" antenna is quite popular but only realises about 1. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! Amateur Radio, Land Mobile, Scanner, Low Power FM, and Airband Antennas. This antenna can be rolled up for easy portable use and will outperform a rubber ducky. Performance is equal to a J-pole, but it's smaller, less obtrusive and more weatherproof. I defy you to buy the component parts on-line in the UK any cheaper. Yes, it can transmit and receive at greater ranges, but it will fry your radio faster too. A DIY directional wifi antenna A great DIY/tech project! With just a handful of cheap parts, a salvaged DirecTV dish and a little soldering, we were able to detect access points from over 8 miles away. Sirio Mag Mount for Amateur or CB aerials requiring the SO239 fitting. This morning I try out a new antenna for the 2 meter ham radio band. How to Support the Portable Roll Up 450 ohm Slim Jim Antenna for more permanent use outside by N4UJW. The examples presented show how to make a portable “roll-up” antenna for your go-bag DIY VHF UHF Antenna for. 50 ft RG8x coax cable with molded PL259 connectors $25. 5 or lower across the 2 meter band and the 70cm band also. 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. Fm Antenna Diy Diy Electronics Electronics Projects Electronic Schematics Ham How to Support the Portable Roll Up 450 ohm Slim Jim Antenna for more permanent use. It uses a matching system similar to j-pole antenna. com that I thought to model my antenna after. Projects to try. It's the construction of the Delta Loop antenna that is the subject of this post. Universal Ham & Amateur Radio Antennas; DELUXE MODEL ROLL UP 2M/70CM ROLL UP J-POLE/SLIM JIM ANTENNA WITH 10FT COAX. Yagi antennas provide directional gain that omnidirectional whips cannot. David Stansbury, KB3KAI Portable Roll-Up J-Pole Antenna. Yes, it can transmit and receive at greater ranges, but it will fry your radio faster too. With RG-58 coax at 5m Here is why, A Slim Jim antenna is basically similar to a Jpole design, but it exhibits a. The object of an antenna SYSTEM, is to deliver as much signal as possible to the antenna jack on the back of the radio at the frequency youre listening to. I know MFJ makes a "pocket 2 meter roll up" antenna that appears to be nothing more than a length of coax with a BNC on the end of it - $30 is a little rich though. It is tuned for both 2m and 70cm. Here's a base station antenna you can easily build for 146, 220 or 440 MHz. The approximate gain in the H-plane of the Slim Jim is from 1. I defy you to buy the component parts on-line in the UK any cheaper. This is called the j integrated match (jim) the antenna itself is very slim hence the name Slim Jim. We call the antennas Slim Jims and they pack a lot of punch but do not unpack your wallet. ground plane antenna, it doesn’t need ground The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service Edison Fong, WB6IQN WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed measurements of a practical, easy to replicate, “roll-up” portable antenna. The proposed antenna would be operational over the entire 6Mtr band (50 - 54MHz) and the entire 2Mtr band (144 - 148MHz), slightly favouring the upper half of both bands. 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. Details about Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole Ham Radio Antenna Radios Communication Band Electronics Homesteading Army Slim Ants I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. The N9TAX Slim Jim antenna is the highest quality roll up antenna available today. This deluxe version is the same as my basic version but with 2 differences. 2m / 70cm "roll up" antennas but it's a quick and easy DIY project. 25m 222-225Mhz HIGH GAIN! Made to fit any HT. Small, Portable, Lightweight and VERY VERY effective. The stock A-V85 is a safe and effective enough antenna that is not too long and is cheap to replace, and performs much better than the other stock Baofeng antenna that are junk. This page is broken 🙁 I've assigned my best minions to fix it up - KB3KAI. 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. BTW, if you have an 88-foot span, you could put up what Cebik called the Broadside Doublet, which is just an 88-foot dipole with ladder line (and 1:1 choke balun & tuner). Offer is good for web orders only. SMA Female Antenna - Popular! 2 Meter Roll-Up J-Pole Antenna, 6 FT RG-174/U coax, includes BNC to SMA Female adapter. Looking at a J-Pole antenna, you would assume that the center connector should be connected to the main radiator, but with the way the antenna is designed and the way it is fed, the RF energy will travel up and radiate up the resonant part of the antenna. DELUXE MODEL ROLL Up 2M/70Cm Roll Up J-Pole/slim Jim Antenna With 10Ft Coax - $24. A roll up J-Pole provides a reasonable antenna that you can hang up in your hotel room. With RG-58 coax at 5m Here is why, A Slim Jim antenna is basically similar to a Jpole design, but it exhibits a. After reading an article about the use of fractal mathematics in the design of cell phone antennas that have incredible bandwidth in spite of their extremely small size, I began to experiment with using a very simple fractal pattern, the Koch Snowflake, as the basis for an easy to build indoor HDTV antenna. In case you have a busy schedule that doesn't allow you to spend a lot of time shopping, you can place your order whenever it's convenient for you. I want to make an all copper J-Pole but where I live they won't let me put one up. fountain-church. Simple, cheap DIY radio scanner antenna (receive only, for police scanners) How to Support the Portable Roll Up 450 ohm Slim Jim Antenna for more permanent use. It was called “Slim” because the antenna does not need a radial to throw signals. Tack it high up in the wall,and call it good. Plus the antenna also…. The stock A-V85 is a safe and effective enough antenna that is not too long and is cheap to replace, and performs much better than the other stock Baofeng antenna that are junk. This antenna can be rolled up for easy portable use and will outperform a rubber ducky. I am a member of the porter county amateur radio club. The design uses a matching system like a j-pole antenna. Super J-Pole Antenna Project. At UHF most of these imitations have horizontal loss of -6dB. A Sim Jim Antenna based on 300 ohm ribbon cable. Ed Fong WB6IQN. Two DIY dual band antenna's I built for VHF/UHF. Discover ideas about Ham Radio Antenna. It is tuned for both 2m and 70cm. VHF UHF 2 METER 70cm ROLLUP SLIM JIM J POLE WITH FERRITE RF CHOKE FOR HAM RADIO. Resources listed under Slim Jim Antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. only good for older model cars with lock switch handles like that. Fong mentions in his original article) cost for performance. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. When I got my ticket I made a vertical dipole for 2 meters out of coax from a junk marine antenna, some crap wire, solder, a roll of tape and a plastic curtain rod, attached to a nylon string running from the ground up to the second story roof. A "Slim-Jim" antenna is quite popular but only realises about 1. Slim Jim Antennas I am a big fan of the J-Pole antenna style and have built a few of them in the past (see here and here ). This is the same antenna that is in the ARRL Antenna Compendium Vol 8 titled "True Dual Band roll-up portable J-pole". 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. Includes adapters for BNC, SMA and SMA - female. 50 ft RG8x coax cable with molded PL259 connectors $25. 00 English Pounds!). materials needed, since the antenna is al-ways at dc ground. in 20 different varieties. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. The Super-J variation of the J-pole antenna adds an additional collinear half-wave radiator above the traditional J and connects the two with a phase stub to ensure both vertical half-wave sections radiate in current phase. Slim Jim vs J-Pole Antennas. J - Pole Roll-Up dual band 2m and 70cm antenna R 500 For Sale. DBJ-2 dual band roll up antenna -available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and 460-470 MHz) includes 6ft extension, BNC, SMA and SMA female adapter $25 TBJ-1 triband base antenna 2mt/220 MHz/70 cm --$60 -includes shipping with 6ft of pvc pipe. com that I thought to model my antenna after. SlimJim design to provide about 6db of gain over a 5/8 wave. 2m / 70cm "roll up" antennas but it's a quick and easy DIY project. Radiowavz also makes one at DOUBLE that price. Mike Means. No longer so you have to try to fit the antenna in your car, as the Break-a-Way antenna pieces are approximately 30 inches long when collapsed. - $30 DBJ-2 (commercial) dual band roll up antenna kit - (152-157 MHz and 460-470 MHz). Here's a base station antenna you can easily build for 146, 220 or 440 MHz. Lots of juice. Using an antenna with a high SWR will heat up the finals even faster. I defy you to buy the component parts on-line in the UK any cheaper. Roll up “slim jim” antennas are an excellent choice for your go bag. You will still need to pry the door open somehow, with or without an air wedge. A DIY directional wifi antenna A great DIY/tech project! With just a handful of cheap parts, a salvaged DirecTV dish and a little soldering, we were able to detect access points from over 8 miles away. This antenna can be rolled up and used for portable operating or placed inside a fibreglass rod or length of hose and put on a roof. They are not an optimal antenna for permanent installation, but you can roll them up and include some coax, an adapter and some 550 cord for quick deployment with your HT. Yes, it can transmit and receive at greater ranges, but it will fry your radio faster too. I have been licensed fo almost 20 years now my original call was KB9FAR. I first introduced the concept of this antenna in Feb. (I made one as a Tech 9 years ago and still use it. The primary problem is that PVC tubing has a significant velocity factor which causes RF to slow down. I have a buddy that hangs a comet gp6 for more than three years and never had a prob, it has the small ground plane outward radials and works real good. Details about 220Mhz Slim-Jim Roll Up Antenna! 1. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. 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. You will first need to cut five 191/ 4 inch sections and one 23/ 4. The Antenna Farm : VHF/UHF Dual Band - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Amplifiers Connectors Aviation Radios Repeater Systems Towers & Accessories Scanners & Receivers Duplexers Diplexers & Triplexers VHF. Hd Antenna Diy, Wifi Antenna, Home Projects, Simple Projects. net is a Web site dedicated to ham radio (amateur radio). How does the J-Pole work? I don't know, but the below video is of someone that seems sure of themselves (hi hi). You might hang a roll-up J-pole on the wall or even use a mobile antenna resting on a cookie sheet. And If I do use the grey box, the RG174 coax harness is so slim, I don't think it would even be possible to install in the Sony grey box. How to Support the Portable Roll Up 450 ohm Slim Jim Antenna for more permanent use outside by N4UJW. Details about Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole Ham Radio Antenna Radios Communication Band Electronics Homesteading Army Slim Ants I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. No damage at all, and it kept right on ticking. The slim jims are neat because of the portablity. The Slim Jim can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. Coax, connections (UHF, N, SMA) and adapters, twin feed, copper pipe and random wire to build and connect some home brew antennas and you're gtg. Build a roll up portable 2m (144MHz) slim jim antenna The "slim jim" antenna has a number of advantages over a helical or quarter wave: It is quite broadband because of its folded element. With RG-58 coax at 5m Here is why, A Slim Jim antenna is basically similar to a Jpole design, but it exhibits a. Two DIY dual band antenna's I built for VHF/UHF. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. There's also a cheap "SlimJim" antenna to build. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. The closer to an exterior wall the better, particularly in the direction of the repeater. Extending the reach of a hand held ham radio with an Arrow Antenna. (I made one as a Tech 9 years ago and still use it. The roll up slimJim antenna is a very effective antenna. It has a SWR of 1. Includes BNC Male to SMA Female Adapter. The antenna is broad-banded and should therefore provide a low SWR across the entire 2-meter band. 220MHz Slim Jim Roll Up Antenna 1 25M 222 225MHz High Gain Made to Fit Any HT | eBay See more. I hadn't initially considered a directional antenna, not a bad idea. J-Pole Antenna Plans (printable PDF format) (800 kb) This is a flexible antenna that is easy to build, inexpensive and very handy to have in your emergency communications kit. Every simulation we have done and physical DBJ-2 dual band roll up antenna - available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152. My personal preference is SSB 144. I've found the DBJ2 to be a solid antenna. Authentic Dual Band N9TAX Slim Jim antenna! Buy on ebay. TV Lead Ham Radio roll up J-Pole Antenna. The slim jims are neat because of the portablity. Coax, connections (UHF, N, SMA) and adapters, twin feed, copper pipe and random wire to build and connect some home brew antennas and you're gtg. 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. The Super-J variation of the J-pole antenna adds an additional collinear half-wave radiator above the traditional J and connects the two with a phase stub to ensure both vertical half-wave sections radiate in current phase. The j-pole antenna will yield slightly less than 3 DB of gain omnidirectionally. We call the antennas Slim Jims and they pack a lot of punch but do not unpack your wallet. 2m / 70cm "roll up" antennas but it's a quick and easy DIY project. The antenna is 3/4 of a wave length long but operates as two 1/2 waves in phase. A J-Pole antenna is a half-wave vertical fed at its base through a shorted quarter-wave stub acting as a transformer matching section. Discover (and save!) your own Pins on Pinterest. If anyone has any ideas or links for websites with some info on building your own indoor antenna please share Thank You and Best Regards Bill Make a "Slim-jim" (J-pole) from some twinlead/hookup wire. The 450 OHM Ladder Line 2M Slim Jim Antenna. The design uses a matching system like a j-pole antenna. My Slim Jim's My Gear How to's Files E-Mail Hello my name is Joe my call N9TAX. How to Unlock a Locked Car Door Without a Key or Slim Jim. Cheap and Dirty CB Base Antenna you can build in an hour A movable fast set up dye pole antenna to increase range ,I like it a lot. Details about Authentic N9TAX VHF Slim Jim J-Pole 2 Meter Antenna roll up jpole Ham Radio Antenna Radios Communication Band Electronics Homesteading Army Slim Ants I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. Small, Portable, Lightweight and VERY VERY effective. Why? Measurements, simulations, a college paper and Fred Judd's own article suggest otherwise. Be prepared for about the cost of a spare battery! Keep this roll-up antenna in your Go-Kit, Go-Bag or backpack, ready to go at a moment's notice. TheOldHObbit wrote: I am unable to trip a 2mtr repeater 17 miles away with either the stock antenna or a 15" third party one, but when I put the slim jim up on a 5 mtr fishing pole it trips the repeater no problem. A Sim Jim Antenna based on 300 ohm ribbon cable. The Slim Jim can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. The Slim-Jim makes a great temporary aerial for use in a hotel room, perhaps hanging from a curtail rail. KIT includes. Simply hang the antenna by the loop provided at the top. The Slim Jim antenna is similar to the J-Pole with increased RF energy at the horizon. This Pin was discovered by Rob Wilson. And “JIM”, because of the quarter wave stub matching technique called “ J Integrated Match”, hence the Slim JIM as named by the original designer. You will still need to pry the door open somehow, with or without an air wedge. The antenna costs almost nothing to construct and should handle up to 50 Watts of power. Discover (and save!) your own Pins on Pinterest. The j-pole antenna will yield slightly less than 3 DB of gain omnidirectionally. Amateur Radio. Cabela's is your home for quality hunting, fishing, camping, recreational shooting and outdoor gear at competitive prices. Here's a base station antenna you can easily build for 146, 220 or 440 MHz. The Slim Jim can be a great portable 'roll up' antenna, if made out of 300Ω or 450Ω ladder line / twin feeder. (I made one as a Tech 9 years ago and still use it. Build a DIY Indoor FM Antenna. This antenna does not need a ground plain but one can be added if you want to. What can I do? A: Try adding a balun to the coax. Wireless enthusiasts have been repurposing satellite dishes for a couple years now. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. I've been producing these antennas professionally for nearly a decade now and have sold over 15000 units. 6dB COLINEAR VHF ANTENNA by Harry Lythall - SM0VPO. ground plane antenna, it doesn't need ground The DBJ-2: A Portable VHF-UHF Roll-Up J-pole Antenna for Public Service Edison Fong, WB6IQN WB6IQN reviews the theory of the dual band 2 meter / 70 cm J-pole antenna and then makes detailed measurements of a practical, easy to replicate, "roll-up" portable antenna. Be prepared for about the cost of a spare battery! Keep this roll-up antenna in your Go-Kit, Go-Bag or backpack, ready to go at a moment's notice. N4UJW ANTENNA DESIGN LAB - Ham Radio Antennas - Design 0r Most are designed for ease of construction and expense! The N9TAX 2 Meter Ladder Line Slim Jim Antenna Review 6 Meter Antennas Mixed types.