loose 21. 51 I believe this shift is due to adding the PVC strips. 33 MB 888. The antennahas an SWR of roughly 1. 4 mm material can be used with no problem. I then began research on what it would take to make this antenna perform well on 2m and 70cm. FREE Shipping by Amazon. You can make one yourself for about 15 with some solder, 300ohm ladder line, coax, and electrical tape. I am thinking about purchasing a Diamond D130NJ Discone antenna to replace the tri band. 2M Slim Jim antenna using Aluminum Tubing. Welcome to the diamond antennas 2m 70cm vertical antennas page. Cost about 6 using new parts. Nothing to add or pay more. In particular I found which two. Short boom length and comapct overall size. Does that work for 14 wave, J-pole, Slim Jim, and other antennas, too. Easy connect to a handy talkie increase range dramatically no ground plane Hence why I purchased the SlimJim 2m antenna this week It will surely boom out and its a safer. Maximum power input 50 watts. A balun is necessary because a J-pole antenna uses a balanced feed (the. Slim Jim 2M Antenna SV5BYR. Description Roll up portable 2 meter70cm antenna with 16&39; lead and your choice of connector. zv; zj. Wavelength 205. 9 Inch 144245430Mhz Whip Antenna for Baofeng Anytone Kenwood TYT Mobile Radios. All antennas are complete with all necessary parts. Rigid mounting. Building the Slim Jim antenna. To construct the antenna, first select a suitable length of grey 25mm conduit (as a minimum 1m but if you make it longer, you will have more room below the coil to attach to your antenna support). The antenna acts like a slim jim on 2m and a jpole on 70cm. Home Brew Dual Band j-pole antenna plans Your going to like this 270 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and sturdy, While looking for an antenna project to build. 5dBi 100W Yagi Antenna 8 Element Beam 2 Meter70 cm VHFUHF Outdoor Yagi Antenna with U-Bolt for 144430Mhz Ham Mobile Digital RadioRepeater (TC-YG08UV) 65. I was playing around with the MMANA Antenna analysis software and wanted to design a 2m70cm vertical antenna. 5 dBd on 70cm bands and it is fed via single 50 Ohm cable (use as short as possible for comfortable operation). 04 shipping. I searched the internet and books high and low to no avail. The formula for calculating wavelength in metric system is 300 (freq MHz) Using the formula. 3 &183; Sep 7, 2011. Max Power 1500 Wat. This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead. Ground plane antennas are easy to recognize by their appearance. Ham Radio Home Brewing Slim Robots Projects Ants Robotics Robot Home Brewing Beer These are the highest frequency transmitters I have, and will thus experience the greatest loss when transmitting through a structure Antenna WaveLength 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. Authentic N9TAX VHFUHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. Adding a coil in series with the antenna at the base is one such method of matching Great antenna Cheap Yagi Antennas for VHFUHF-- From Kent WA5VJB Coaxial Collinear Antenna-- 432 MHz -- From Via N9ZIA Small 70cm Yagi-- From The ARRL 9 dB, 70cm, Collinear Antenna From Coax-- Version I -- From N1HFX 2M440 MHz Dual Band Copper J-Pole From N7QVC. I then began research on what it would take to make this antenna perform well on 2m and 70cm. Q I built the dual-band J-pole antenna from the article in the September 1994 New Ham Companion (An Easy Dual-Band VHFUHF Antenna, page 61), but I just cant get it to work. J-Poles-- From The ARRL Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M J-Poles Antennas-- Dimensions, matching, everything -- from Bux CommCo -- Be sure to read importance of a decoupling loop. Our repeaters are connected on Echolink and can be accessed from anywhere in the world. So the X-Quads fits (collapsed) in any car trunk, shipping cost outside Germany will. Strip both ends (top and bottom) about an 12 to 34 inch and bend each toward the center so they will overlap each other. Common connector for both bands or with separate connectors for 2 meter and 70 cm. Amateur radio, military operators and . Homebrew 2m70cm Slim JIM antenna fed with RG316. Above images show a Slim Jim built for 1090 MHz using this antenna calculator. The secret formula I will leave for the history books. N9TAX Slim Jim Dual band VHFUHF roll-up Antenna 4,630 views Mar 31, 2017 Like Dislike Share Save Ham 4All 4. Slim Jim 2M Antenna SV5BYR. Authentic N9TAX VHFUHF Slim Jim J-Pole For HT 2m 70cm. In the picture above I used hose clamps to clamp the coax pig tail directly to the antenna. Description Roll up portable 2 meter70cm antenna with 16&39; lead and your choice of connector. how many high schools in montgomery county md. What I came up with was a trapped end fed folded dipole. Building the Slim Jim antenna out of copper tubing for VHF 2m FM. Slim Jim Info. Now to be honest I use what I believe to work the best for what this antenna is designed to be all Authentic N9TAX VHFUHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. Demonte olan MA2000 2m VHF 6. Both are omni-directional. 200 MHz the SWR was measured at 1. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. SKU DUAL-2M70CM-LONG-SMAM. ians mass produced this antenna during the VHF frenzy in the mid-80&x27;s. Slim Jim Info. Subscribe HAM RADIO Easy SlimJim J-Pole Dual band Antenna Build for 2m70cm, Thanks to a book I purchased many moons ago, I have found the perfect way to pass a rainy day. Cebik web site requires registration (free) Commercial 2M 70cm Slim Jim N9TAX. It is this and this alone that makes this one of the best terrestrial communications antennas I have ever seen for the price. The antenna costs almost nothing to construct and should handle up to 50 Watts of power. More. Build your own Roll Up Slim Jim Antenna for the 2 Meter Ham Radio Band. I then began research on what it would take to make this antenna perform well on 2m and 70cm. This antenna can be used with both your home VHF equipment or your. Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M J-Poles Antennas Dimensions, matching, everything from Bux CommCo. The measurements above are not extremly critical but may have to be lengthened or shortened for your particular operating frequency. OSJ - Business Band, Marine Band & MURS 150-162 MHz. A collinear. Use SWR meter to adjust all-thread and position of bracket on. 166 Dual Band Ribbon J-Pole for 2m, 70cm. It can be built for almost any frequency. In calculation 2 I have. But this design yields excellent results compared to many other dual band antennas. J Pole antenna projects. FREE Shipping by Amazon. com - The Amateur Radio Hotspot - Our. Log In My Account sa. net - Antennas - A 2-element 12 wave collinear J-Pole Ham Equipment Ham radio, Ham radio antenna, Radio antenna J-Pole The simplest best FM antenna in the world KN9B - 2M 70 cm J-Pole Radioamador, Rdio amador, Rdios Slim Jim J Pole Antenna Calculator 21 Things to Do Build an Antenna - KB6NU&x27;s Ham Radio Blog Vertical Collinear Result will be. The formula for calculating wavelength in metric system is 300 (freq MHz) Using the formula from the figure, we have 300146 2. This antenna sells for 33. 450 Ohm Slim Jim Antenna Project by KE4NU Radio Shop, Radio Kit, Ham Radio. Homebrew 2m70cm Slim JIM antenna fed with RG316. 2 Dual-Band Slim-Jim I ordered a Slim-Jim with 16 ft RG58AU cable, terminated with a male SMA con-nector that attaches directly to my Yaesu FT-70D handheld transceiver. zv; zj. This in itself says something about the. Building a Dual-Band Antenna. Cheap Yagi Antennas for VHFUHF-- From Kent WA5VJB Coaxial Collinear Antenna-- 432 MHz -- From Via N9ZIA Small 70cm Yagi-- From The ARRL 9 dB, 70cm, Collinear Antenna From Coax-- Version I -- From N1HFX 2M440 MHz Dual Band Copper J-Pole From N7QVC 134 - Taylor Vee Antenna for 20m 134 - Taylor Vee Antenna for 20m. Authentic N9TAX VHFUHF Slim Jim J-Pole For HT 2m 70cm. For RX only, the gap " E " can (should) be as small as possible without making electrical contact. For example, if you wanted a general J-Pole for 2 meters, you might enter the center of the 2 meter band which would be 146. I&x27;ve constructed a 144440 Dual band Open Stub J-Pole Antenna. Larry Cebik and myself, there is NO validlity to the Slim Jim. 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. 74K subscribers On the web httpwww. Review Summary For N9TAX Dual band slim jim portable antenna by 2way electronix. J-Poles-- From The ARRL Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M J-Poles Antennas-- Dimensions, matching, everything -- from Bux CommCo -- Be sure to read importance of a decoupling loop. Example screw in 80,40,20 meter hamsticks and a dual band 2M440 MHz whip (two on each band) on opposite sides Description 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 A 40mtr antenna for small spaces For my delta loop that meant the wire would have to be about. On my site you can find both the all copper 2. 5db Doan Yldz Markal Antenimizi apartman st katnda bulunan gne enerjisi depo demir karkasna (apartmann asansr makina dairesinin zerinde olucak ekilde) 50mm Antenna slm jm dual band VHFUHF by PU2OKEPU2OKE. It has gains 4 dBd on 2m and 6. - Forum Krtkofalarskie. I make this new deluxe with a ferrite bead installed at the antenna feed point to eliminate rf feed-back through the coax. The dimensions given assume that the antenna is inserted into a 34 inch Class 200 PVC pipe. Product is in production. Simple Wideband Yagis for 2m and 70cm Errata and extra pictures. Log In My Account sa. Cebik web site requires registration (free) Commercial 2M 70cm Slim Jim N9TAX. The measurements above are not extremly. I have some instructions on building. Projekte Zu Versuchen. Working through satellites is a field in HAM radio, which has given a new dimension to the HAMs interested in working with I had a dual band handy YEASU FT-60R (vhfuhf), max power 5 watt. 3 DB of gain on 2 meters, I can open 4 repeaters that I can't even hear with the J Pole. What is Collinear Antenna Calculator. Planning to try out your cw practice mp3s as well. 95 Strong Rare Earth Magnet Base. 95 6. Medicare 101. But this design yields excellent results compared to many other dual band antennas. A collinear. You are watching me set up a Slim Jim 2 Meter ham radio antenna a friend of mine made. High quality RG-58 cabling. The impedance of this antenna is around 300 , so you may want to use a 4 1 transformer or a 4 long piece of 150 coaxial cable to match this impedance to 75 . Dualband Antenna 2meter 70cm Mobile VHFUHF Ham Radio (137-149, 437-480 Mhz) Mag Mount Magnet Base PL-259 Connector, 10 Ft RG58 Cable. Slim Jim Info. The Slim Jim, designed by the late Fred Judd, G2BCX, can be a great portable &x27;roll up&x27; antenna, if made out of 300 or 450 ladder line twin. I then began research on what it would take to make this antenna perform well on 2m and 70cm. What can I do A Try adding a balun to the coax. If the only repeaters you can reach from your apartment are 2 meter, then a single band 2 meter antenna may give you more. Review Summary For N9TAX Dual band slim jim portable antenna by 2way electronix. I like to promote SOTA and what a better way than with a 2m or dual band HT. New 2 Meter 70Cm VHF UHF Dual Band Antenna K5BJM Base or Portable Slim Jim. This antenna with the adjustable plate for tuning can be built from type M 12in copper tubing for around 13 and the coax pig tail would cost around 12. The coax antenna screens the opposite current and the outer does the radiating in phase. Started by gil, May 09, 2012, 034107 PM. Simple Wideband Yagis for 2m and 70cm Errata and extra pictures. ORIGINS of the SLIM JIM Invented by Fed Judd, G2BCX Original design was for a single band Overall length is nominally l 1. 74K subscribers On the web httpwww. Q I built the dual-band J-pole antenna from the article in the September 1994 New Ham Companion (An Easy Dual-Band VHFUHF Antenna, page 61), but I just cant get it to work. LoRaLoRaWAN tutorial 46 Collinear Antenna Diamond X-400 Antenna (2m & 70cm) I now use a Diamond X-400 collinear antenna for 2m and 70cm, having recently upgraded from a Diamond V2000 tri-band 2m, 6m and 70cm Theory on each side, you bring two 50 Ohm lines together in parallel bringing the impedance to 25 ohms After removing the outer jacket, start bunching the. See the. Search Collinear Antenna Calculator. Very pleased with the J-Pole I received, quality built, very well packed,. Description Roll up portable 2 meter70cm antenna with 16&39; lead and your choice of connector. This link is listed in our web site directory since Wednesday Mar 16 2011, and till today "Slim Jim Antenna Build" has been followed for a total of 5782 times. dual band 2m 70cm slim jim antenna plans The yellow trace is the VSWR reading from the antenna analyzer. Ham Radio Antenna - N9TAX Slim Jim Dual Band Antenna Review. Some Notes on the Slim Jim Antenna M0UXB. What I came up with was a trapped end fed folded dipole. HYS Dual-Band 9. Now the antenna is similar to a dual band Open-Sleeve. Our repeaters are connected on Echolink and can be accessed from anywhere in the world. The two ends are soldered together to make a loop and a small gap cut out of one side of the ladder line, the Coax feeder is then soldered to the ladder line to make a flexible antenna. Description Roll up portable 2 meter70cm antenna with 16&39; lead and your choice of connector. MFJ Duplexer-two radios one antenna or vice versa; Idiot&39;s Guide to Wire Antennas; My low cost 10 meter DIY; Ground Radials for Vertical Antennas. Dualband Antenna 2meter 70cm Mobile VHFUHF Ham Radio (137-149, 437-480 Mhz) Mag Mount Magnet Base PL-259 Connector, 10 Ft RG58 Cable. This is a true unbalanced antenna, with a feed impedance of around 50 and therefore a great. DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. Some Notes on the Slim Jim Antenna M0UXB. The layout of the antenna is as follows. 6K 40K views 2 years ago hamradio pota parksontheair This is a. The original Ed Fong Dual Band VHFUHF 70cm2m J-Pole PVC Pipe Antenna Eye-On-Stuff Please consider donating to my channel so I can make more videos for you How does a J-pole antenna. This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead. Mounting GMRS antenna. Tried it once but it didn&39;t help with the specific repeater I was trying to hit. 520MHz) or 70cm (446. Adding a coil in series with the antenna at the base is one such method of matching Great antenna Cheap Yagi Antennas for VHFUHF-- From Kent WA5VJB Coaxial Collinear Antenna-- 432 MHz -- From Via N9ZIA Small 70cm Yagi-- From The ARRL 9 dB, 70cm, Collinear Antenna From Coax-- Version I -- From N1HFX 2M440 MHz Dual Band Copper J-Pole From N7QVC. What I came up with was a trapped end fed folded dipole. Very pleased with the J-Pole I received, quality built, very well packed,. 5dBi 100W Yagi Antenna 8 Element Beam 2 Meter70 cm VHFUHF Outdoor Yagi Antenna with U-Bolt for 144430Mhz Ham Mobile Digital RadioRepeater (TC-YG08UV) 65. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day 1 shows the 2 dipoles with details about the coaxial cables Earlier in the week a video comparing a Discone to a Coax Collinear antenna for ADS-B reception was posted Excellent FB, Excelent GT) and short 50 ohm coax. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day 1 shows the 2 dipoles with details about the coaxial cables Earlier in the week a video comparing a Discone to a Coax Collinear antenna for ADS-B reception was posted Excellent FB, Excelent GT) and short 50 ohm coax. Very pleased with the J-Pole I received, quality built, very well packed,. The measurements above are not extremly critical but may have to be lengthened or shortened for your particular operating frequency. Both are omni-directional. 00 mhz. The antenna comes in two flavors, Ham and Commercial. HAM RADIO Easy SlimJim J-Pole Dual band Antenna Build for 2m70cm, Thanks to a book I purchased many moons ago, I have. Subscribe HAM RADIO Easy SlimJim J-Pole Dual band Antenna Build for 2m70cm, Thanks to a book I purchased many moons ago, I have found the perfect way to pass a rainy day. Description Roll up portable 2 meter70cm antenna with 16&x27; lead and your choice of connector. FRS devices can transmit across 14 channels while GMRS radios have 15. Working through satellites is a field in HAM radio, which has given a new dimension to the HAMs interested in working with I had a dual band handy YEASU FT-60R (vhfuhf), max power 5 watt. What I came up with was a trapped end fed folded dipole. 5K subscribers Subscribe 1. antenna is a Dual Band 2m- 70cm J-Pole Roll-up Antenna. Working with twin-lead, I recommend the Ed Fong dual band J pole. Get it as soon as Wed, Jun 22. We zeroed down on the slim jim antenna for the rig. I decided to try building a 70cm Slim Jim Antenna in this video as well as give a channel update. Note The gap specification is for a RXTX antenna and will need slight adjustment using the top curve as well as the matching section for transmitting (NOT ADVISED). A balun is necessary because a J-pole antenna uses a balanced feed (the. Medicare 101. ORIGINS of the SLIM JIM Invented by Fed Judd, G2BCX Original design was for a single band Overall length is nominally l 1. A balun is necessary because a J-pole antenna uses a balanced feed (the. - 48 DBJ-2 (commercial) dual band roll up antenna kit - (151-156 MHz and 460-470 MHz). The Antenna is planned built using 6mm aluminium rods. Authentic N9TAX VHFUHF Slim Jim J-Pole For HT 2m 70cm. Install 18-inch all-thread. Slim Jim 2M Antenna - SV5BYR 99 GHz and a 2 See full list on jackenhack X-30 N 2M 70CM dual band collinear antenna aerial pmr 446 PMR446 The approximate gain in the H-plane of the Collinear J antenna is from 4 The approximate gain in the H-plane of the Collinear J antenna is from 4. Subscribe HAM RADIO Easy SlimJim J-Pole Dual band Antenna Build for 2m70cm, Thanks to a book I purchased many moons ago, I have found the perfect way to pass a rainy day. What I came up with was a trapped end fed folded dipole. This in itself says something about the dedication I have to creating a quality product. A magnifying glass. Posted by. Page 1. Build the Slim Jim Antenna. In this video, the "Radio Prepper" shows us an easy way to make this versatile, compact antenna which can be stored in your vehicle or at your home station for emergency use. HAM RADIO Easy SlimJim J Pole Dual Band Antenna Build For 2m 70cm. com for dual band antenna 2m 70cm. It rolls up quite compactly. This is because on 2m its a half wave which has a nice low radiation pattern, but on 70cm the antenna. The QM7 antenna is a simple 7 elements Yagi with 3. L Length (feet) of a 12 wave ant Albert&x27;s SAT score calculator uses official practice test curves from the College Board This antenna can handle up to 200 watts 7 1 GROUNDPLANE ANTENNA Model FA -2 Reliable communications in radio systems depends upon the over-all effectiveness of both the base station and mobile unit antennas 2 meter 70cm. I searched the internet and books high and low to no avail. Input frequency and velocity factor before clicking the calculate button. usc vmock, menards cedar mulch
81 at resonance (see Figure 2). . Dual band 2m 70cm slim jim antenna plans
The original Ed Fong Dual Band VHFUHF 70cm2m J-Pole PVC Pipe Antenna Eye-On-StuffPlease consider donating to my channel so I can make more videos for you. A collinear antenna array is made up of dipole elements 32 - Four Element Broadside Antenna 2 meter 70cm dual band j pole antenna 144 440 mhz ham radio 1 This calculator uses a method Hill-RBF Calculator Version 3 Hill-RBF Calculator Version 3. I then began research on what it would take to make this antenna perform well on 2m and 70cm. My models are proportioned for 1. This is because on 2m it&39;s a half . Antenna was designed for SO-50 satellite operation. 5dBi 100W Yagi Antenna 8 Element Beam 2 Meter70 cm VHFUHF Outdoor. Slim Jim Info. Tried it once but it didn&39;t help with the specific repeater I was trying to hit. com for dual band antenna 2m 70cm. Use SWR meter to adjust all-thread and position of bracket on. Real measurements of a Slim Jim antenna and traditional j-pole antenna reveal the truth about their respective gain and pattern. le; lt. OSJ - Business Band, Marine Band & MURS 150-162 MHz. Every simulation we have done and physical. This is because on 2m it&x27;s a half wave which has a nice low radiation pattern, but on 70cm the antenna may kind of work, but it won&x27;t be working as intended and will have a poor radiation angle. Description Roll up portable 2 meter70cm antenna with 16&39; lead and your choice of connector. Cower the whole band with a 2m70WB19R antenna. Figure 1 il-lustrates the N9TAX development and final design configuration. 5 and 3 across the band. The J-Pole antenna became so popular in the VHF band because of its simplicity in design and construction. Authentic N9TAX VHFUHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. Includes adapters for BNC, SMA and SMA - female. LY3LP laboratory Lazy H 2m 70cm dualband satellite antenna. 2 Meter Slim Jim Copper Tubing Antenna by KE5FXU. The N9TAX Slim Jim antenna is the highest quality roll up antenna available today. Slim Jim Info. Zooming in on 2M shows a slightly better SWR than the full spectrum, at between 1. The measurements above are not extremly critical but may have to be lengthened or shortened. &183; More gain in less boom length than a traditional Yagi. After the best match has been found, you may want to solder the SO-239 and the stranded wire end to the 12 tubing. Home Brew Dual Band j-pole antenna plans Your going to like this 270 Dual Band Copper Cactus J-pole Antenna , This dual band j-pole antenna plan is easy to build and sturdy, While looking for an antenna project to build. However, the SWR stays close to 21 across the entire 2-meter band. Antenna Collinear Calculator I2XW63 It&x27;s quite simple to construct. Slim Jim 2M Antenna - SV5BYR. Product is in production. OSJ - Business Band, Marine Band & MURS 150-162 MHz. 2 meter collinear antenna plans. loose 21. Authentic N9TAX VHFUHF Slim Jim J-Pole For HT 2m 70cm. Super J-Pole Antenna (Collinear Design) - By KB0YKI 2M, 220, 440, 6M J-Poles Antennas Dimensions, matching, everything from Bux CommCo Be sure to read importance of a decoupling loop The counterpoise wires are cut 5-10 longer than the antenna wire, and are used to support the antenna Electronics > Communications > Antennas. Can be mounted ion front of mast or centrally on mast. Antenna is housed in a 10&x27; length of 34" 200 psi PVC pipe. I then began research on what it would take to make this antenna perform well on 2m and 70cm. Our foxhunts cover a 20 square mile area, and we have both live foxhunts and hidden fox-boxes for you to find. Slim Jim Info. Install 18-inch all-thread. Trapped UHF section for proper band alignment. But this design yields excellent results compared to many other dual band antennas. Authentic N9TAX VHFUHF Slim Jim J-Pole Dual Band 2m 70cm Antenna jpole. It also works pretty well in the 800 band although its not manufactured for that band of frequencies. Includes adapters for BNC, SMA and SMA - female. The results showed a good match on 6m, on 4m resonance was right at the bottom of the band (ideal for DL band plan) and on 70. florida tile near me. Will handle 100 watts. MSRP 25. Slim Jim 2M Antenna SV5BYR. 13 thg 8, 2021. The results showed a good match on 6m, on 4m resonance was right at the bottom of the band (ideal for DL band plan) and on 70. I like to promote SOTA and what a better way than with a 2m or dual band HT. MSRP 25. November 20, 2018. hi, i homebrew this one. Dual Band 2m-70cm J-Pole Roll-up Antenna Retail Kit Build. If you decide to make a 2m antenna . Slim Jim Build. summer 2022 weather predictions. HYS Dual-Band 9. X-30 N 2M 70CM dual band collinear antenna aerial pmr 446 PMR446. 5 dBd on 70cm bands and it is fed via single 50 Ohm cable (use as short as possible for comfortable operation). 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. 2M Slim Jim antenna using Aluminum Tubing. YO7JBP III 2 years ago. A New Take on the Simple 2m70cm Dual Band J-Pole. FRS devices can transmit across 14 channels while GMRS radios have 15. The J-Pole antenna became so popular in the VHF band because of its simplicity in design and construction. The front left is the dual-band ham antenna. If fed with coax, the antenna needs a matching network for 70 cm, a choke at the feedpoint, and some way to get I have used EDZ vertical antennas on 440 with good results. 64 Dual-Band Sloper Antenna. LoRaLoRaWAN tutorial 46 Collinear Antenna Diamond X-400 Antenna (2m & 70cm) I now use a Diamond X-400 collinear antenna for 2m and 70cm, having recently upgraded from a Diamond V2000 tri-band 2m, 6m and 70cm Theory on each side, you bring two 50 Ohm lines together in parallel bringing the impedance to 25 ohms After removing the outer jacket, start bunching the shield down the coax from the. L Length (feet) of a 12 wave ant Albert&x27;s SAT score calculator uses official practice test curves from the College Board This antenna can handle up to 200 watts 7 1 GROUNDPLANE ANTENNA Model FA -2 Reliable communications in radio systems depends upon the over-all effectiveness of both the base station and mobile unit antennas 2 meter 70cm. MFJ Duplexer-two radios one antenna or vice versa; Idiot's Guide to Wire Antennas; My low cost 10 meter DIY; Ground Radials for Vertical Antennas. Slim Jim Build. Authentic N9TAX VHFUHF Slim Jim J-Pole For HT 2m 70cm. Rigid mounting. Both are omni-directional. Antenna Round Up antennas for 6, 10 & 2 meters Antenna Theory 101 antenna tutorial from KD4SAI Antennas from K5DKZ Antennex online antenna magazine Attic Antenna trap dipole design for your attic. Measure and Saw the all-thread. This is a really easy, fun antenna to build. I saw the plans for this on the internet (link to plans) by Allen. Also includes a 6 ft extension cable. Figure 1 Basic 2M Slim Jim Antenna Key features are Good radiation efficiency, because of low angle radiation Unobtrusive No ground plane radials, so wind resistance is low Rugged Construction no radials to break or bend Fully weatherproof 50 input impedance Low VSWR 1. then a single band 2 meter antenna may give you more gain than a dual-band 2440 antenna. This in itself says something about the dedication I have to creating a quality product. The measurements above are not extremly critical but may have to be lengthened or shortened for your particular operating frequency. Mount antenna mount on bracket. 5K subscribers Subscribe 1. Every simulation we have done and physical. Dual Band 2M 70CM Stainless Steel J-pole Antenna, Made in USA. 74K subscribers On the web httpwww. MSRP 25. 2022 Author qfk. The N9TAX Slim Jim antenna is the highest quality roll up antenna available today. Search Gmrs Slim Jim Antenna. Review Summary For N9TAX Dual band slim jim portable antenna by 2way electronix. Build The 3 X 5 Elements 2m 70cm Dualband Yagi Dw1zws Panda Antenna Original Handcrafted Philippines Making A Basic Slim Jim 2m Antenna Essex Ham Build A 9db 70cm Collinear Antenna How To Build Homebrew A Dual Band Antenna For Handhelds Dual Band Antenna Home Brewing. Roll up slim jim antennas are an excellent choice for your go bag. This antenna sells for 33. Matching is excellent on all three bands and can be tuned independently. . basketball hoop installation service