Homemade 2m 70cm Antenna

I followed that with a 440 MHz J-Pole. The actual antenna portion of the pipe is going to be 560mm (22″) tall, but you will need to put a cap on the top of the pipe and also have some tubing protruding below the antenna portion for mounting. Super J-Pole Aaron Schmitz KB0YKI. 95: YAESU FT65R 2m/70cm HT $79. Cheap LEO Antenna Drew, KO4MA, using the Cheap LEO antenna during a Dayton AMSAT LEO Demonstration Hand held dual band antennas are popular for QSO's through many of the Low Earth Orbit (LEO) satellites. Total height 5ft 8 inches. Serial communication is designed to allow just two devices to communicate across one serial bus. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. The correct lengths for the various models will be displayed in the chart. This is a simple and quick design for a collinear antenna. I got lucky, because I was using 147. 5 metres of ladder line as the main antenna that can roll up neatly in a coil and can be used hanging from a curtain rail above a window, dropped down from a tree, or taped to the side of a fishing pole and raised. 25m BOXX TB-4 FM/VHF/UHF hand-held Dipole antennas tri band. The 2 meter antenna worked perfectly on the first try! It has a flat 1 : 1 SWR across the entire 2 meter band. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi - compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna's. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. UHF Hand Held Radios. 2 METER SSB SQUARE LOOP From N4UJW 2m Quagi By W5UN 2M Yagis a Bunch-- From The Antenna Elmer 2M Quadix-- from Ross W1HBQ 2m 8db collinear for portable use. He also tightened up the gap between the 2m/70cm sections seen in these pictures; the pics were taken before he corrected them. 70MHz Quarter Wave Ground Plane Antenna I had a dipole up for 4m previously ( see here ), which worked fine, but was quite ugly on a 1 metre boom arm. schemas/on6mu_vhfrubberduck. 5 cm) at each end to strip the insulation, peel back the braid, strip the center conductor, and attached the ring lugs. Both of these ants. schemas/yagi_vhf_antenna. LNA was designed using ATF-531P8 E-pHEMT with High IP3 (37 dBm). At this frequency, this antenna is getting very practical and easy to build. 1/2 and 5/8 Al pipe sizes are used. Here i present all steps to build this antenna. This is a temporary set up as I have just bought a full size duel band mobile antenna and mag mount. A Simple 2 m/70 cm Vertical Dipole Antenna This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. If you want to upgrade your 2m/70cm mobile handset with a greatly improved antenna I personally recommend the ExpertPower XP-669C if you need something compact and the Retevis RHD771 at all other times. 8 GHz WLAN WiFi Antenna FM - TV Antenna Amplifiers Diplexers Ham Radio. 20161121 70cm / 2m white stick antenna. put your junk antenna parts to use. To keep costs down, coax is soldered directly to the board and you can use heatshrink or the Yagi boom itself as a case. , the $26 BaoFeng UV5R) and would like more effective range without having to buy an amplifier. To the rescue, would be an external antenna. Click on Calculate and the opposite value will be displayed in feet and inches or frequency in megahertz (Mhz). Many improvements have been made since my original article "Omni-Gain Collinear for 70 cm and 23 cm" was first published in the May 1982 issue of 73 magazine. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. This results in the antenna operating with four half-waves in phase on 70cm and provides a theoretical antenna gain of 6dBd on 70. The Diamond RH-999 is a quad band whip antenna that covers 6m, 2m, 70cm, 23cm. VHF and UHF Antenna Systems 18-21 Fig23—These drawings illustrate the dimensions for the 144-MHz ground-plane antenna. Mast mounts (1 3/8, 1 3/4 and 2" diameters available) Vertical Flat mount. Covering 144 Mhz – 146 Mhz and 430 Mhz to 440 Mhz. 6m/2m/70cm Yagi Antenna Built from Old TV Antenna by KGØZZ This turned out to be a great little antenna. The design is based on an article which originally appeared in CQ magazine (1987), and a version of this design is produced by Arrow Antennas of the USA (not. I am currently using a Popovic antenna for 2m, it is also a duel band so will cover 70cm. A portable 2-element VHF yagi May, 1997 Here's a simple Saturday project: build a portable VHF yagi antenna for 2 meters. Radio Shack # 21-961 3/8"-24/SO239 Mount (Mobile CB Antenna) Radio Shack # 15-826 TV Mast U-Bolt Clamp Assembly About 85 inches of 3/8" diameter Solid Aluminum Rod. As I see it, the antenna works by having the signal travel through the. Multiband Antennas are antennas that can be used for more bands at once, thus they are very practical. design a j pole for any band. 416-667-1000. Amateur radio, ham radio, cb, GMRS, FRS,marine band and electoinc components. com, mainly located in Asia. _____ Antenna tipo: Dipolo piegato progetto del prof. For the complete 2m-data see the 5-Element-ultralight-Yagi. 7m, Wavelength: 2x5/8, 4x5/8). 6M/2M/70cm Vertical. (I like the 14" dual band ones from Ebay. Super J-Pole Aaron Schmitz KB0YKI. Building a Quadrifilar Helix Antenna for Undergraduate Researchers Introduction There are many different antenna designs for capturing images from weather and other low-level, non-geosyncronous satellites. 2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. this antenna can be tune just open and make 1/3 of a cut to each rod to the resonate freq it works fine 1. CO LINEAR ANTENNA DESIGN While it is not possible to home-brew a commercial quality antenna, it is very feasible to build a collinear antenna for average use. 70MHz Quarter Wave Ground Plane Antenna I had a dipole up for 4m previously ( see here ), which worked fine, but was quite ugly on a 1 metre boom arm. I wanted to make something simple that would be reliable and not require a balun or any impedance transforming, so I decided to build a quarter wave ground plane antenna for home. 9 inches) long, almost nothing! I got some PVC pipe in a home repair shop. When you found the "sweat" spot solder the the centre to the coil. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. Three di. Here is a simple 2meter Moxon Antenna you can build for indoor weak signal use. ATF-531P8 E-pHEMT is more reliable than low power ATF-54143 …. GP15 Vertical 6m/2m/70cm: COMPACtenna: 6m/2m/440 6m, 2m and 440 MHz Antenna: 10m/2m/440 10m, 2m and 440 MHz Antenna: 20m/2m/440 20m, 2m and 440 MHz Antenna: HamR-7 40m, 20, 10m, 6m. Diamond antennas make great vertical antenna for 2m/70cm/6m, high gain antennas made from the best materials made to last and the market leader in ham radio antennas,we sell diamond antennas at the best prices with large stocks and fast worldwide delivery. 5:1 or less Max Power 150W Length: 50″ Connector: Gold-plated PL-259, fold-over hinge included. For 70cm you can get a 70cm antenna, or perhaps find an antenna designed for both bands. Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. 5 MHz into dipole array Following years, Moon used for Teletype. It will also be necessary to connect a MP3 recorder because is it not practical to note the call signs, the QSO's, and to hold the antenna to track the Sat's. 999MHz satellite band) has third harmonic of 437. Photo: EA5FUZ The X-Quad is an improved design of the well known multi element quads. Wire Antenna Calculator. Hot this week in 2m Antenna. The statement often made is a single quad element has 2 dB gain over a dipole, and that 2 dB gain difference carries over into arrays of quad elements. This lightweight antenna is perfect to use for fox hunts or as a portable directional antenna for public service events. Here are some answers. Nice job, Wayne! Here are the pics:. antenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. The Diamond RH-999 is a quad band whip antenna that covers 6m, 2m, 70cm, 23cm. Arrow Antennas - pictured, left--K6LCS' Arrow Antenna Mods. RG-179 75 ohm coax with a velocity factor of about 0. Instead of using stainless steel for the elements, he used brass. Frequency in MHz: Wire Diameter: John Simpson, KG4ZOW Download source code. 100 MHz, which just happened to both yield a length of 19. In understanding the basic Yagi antenna theory, the different elements of the Yagi antenna react in a complex and interrelated way. ) Aluminum Arrow Shafts are used for elements. A J-Pole antenna, like the one shown in Figure 1, is an end fed half wavelength. Inverted V antennas can be tied off as high as possible, but can go as low as 3 or 4 feet (0. Re: Homebrew 2m, 70cm mobile antenna Post by g8jit » 15 Feb 2010, 09:52 The welding wire is a good suggestion, can be a bit whippy when moving, bit as suggested some tubing round it wound help. The SWR on 70cm is better in the range 430-438MHz. 300 Ohm Twin Lead with the ends shorted is an option for even greater bandwidth. DualBand 2M/440MHz mobile antenna Very short yet efficient antenna, mainly used in metropolitan areas where extended range is not critical. Depending on the type of feed, a 70 centimeter antenna can look like and open or short at 2 meters. Antenna was designed for SO-50 satellite operation. antenna element alone connects one ele-ment to the next. Arrow antenna makes a 2m/440 j-pole, which at $49. This will add cost, however. UHF Hand Held Radios. Specifications antenna type 2 RE-A144V58/2. After many requests for a dual band version of this antenna. 0 mHz and ~445. on 23 cm (1200 MHz), making the antenna an excellent candidate for ATV repeater use. 25m and 70cm bands. It measures at 5. If you decide to make a 2m antenna, you’ll end up with 1. 95: ICOM IC9700 2m/70cm/1. 2 element 3-band mini beam. 5dBd, which is. There are usually four radials, three being a minimum, but you could use up to six. The 70cm radiator is changed to coaxial antenna design. cb antenna mounting location. The 2 meter stack is also almost 10 feet higher than the 70cm stack. For example if you cut a dipole for 7. It consists of a dipole driven element mounted in front of two flat rectangular reflecting screens joined at an angle, usually 90°. design a j pole for any band. Adobe Reader required. Bicycle spokes are even cheaper I think? Foppe PD0FF heard me on air talking to a station from Italy, he wondered what antenne I used. The antenna offers a gain of about 10 dB, is lightweight, mechanically strong and rivals the performance of similar commercial antennas. 2 Meter J Pole Beam Jagi Tri-County Amateur Radio Club. The 2 Meter band tape measure beam antenna is a 3 element Yagi with about 7. So, there you have it. 5 db gain on 144-148 Mhz 7. The antenna in the main picture is a 6m Half Wave endfed. The only real way to measure SWR is with micro- striplines. Also from there, the 70cm input lead connects to the 70cm input on the triplexer. 2:1 SWR on the 70CM and can hit a repeater with 1W that's about 20 miles away. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. 6 Meter (50 MHz) 2 Meter (144 MHz) 1. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi - compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna's. Operates without radials. Only About 19 oz. If you are not satisfied with them, return to get your money back!. It works the 6 meter, 2 meter and 70 centimeter bands. 5 - 1 across both bands with 55 watts input. I then began research on what it would take to make this antenna perform well on 2m and 70cm. The Firestik 2-Meter antenna is an omni-directional antenna for the 144 to 148 MHz, 2 meter amateur band. The top countries of suppliers are China, Taiwan, China, and Hong Kong S. My main shack location has a commercial J-Pole Dual band mounted on a short mast. , the $26 BaoFeng UV5R) and would like more effective range without having to buy an amplifier. February 19, 2015 TVARC Antenna Guide for The Villages 2 Antennas for The Villages Tonight's review of the antenna members have used Tonight's list of antennas will cover • Multiband Antennas HF, 6M and some 2M/70cm • Presenting the implementation for most used • Description of layout with key PROs and CONs. The folded dipole is claimed to offer increased bandwidth, and to closely match 300-ohm line. It is unlikely to switch. 65 USD for 6. Virtually any HF antenna on a mobile is a compromised antenna by using coils to make it electrically longer than it physically is, which reduces its effectiveness, but there are those that do it because they can. 5 cm) at each end to strip the insulation, peel back the braid, strip the center conductor, and attached the ring lugs. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 1 How to Build a Dual-Band Antenna for 2M/70cm. Publié dans * ANRPFD, ARISS-ISS, Association Radioamateurs, Satellites. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. It shows the size and position. > * Diplexer HF + 6m / 2m + 70 cm > * Clean PACTOR and digital modes - Adapterbox > EH-Antenna: tests and conclusions. I've never really had much interaction with Mr. Inverted V antennas can be tied off as high as possible, but can go as low as 3 or 4 feet (0. Three di. schemas/on6muvhf58verticalantenna. pattern (black) and the same antenna on 70cm (red). 2 Meter WB8ERJ. I got lucky, because I was using 147. ) This is the hardest part to find. Based on Rothammel / DL6WU You may want to combine it with a folded. Operates without radials. As for me I'm trying to target 70cm for now as I do not have a usable 2m radio, so 1% of 70cm would be 7 millimeters which will be tough to get perfect. Half way the coil is a good place to start. left, diagonal). FOR IMMEDIATE RELEASE December 30, 1899. Another 9 Element VHF Yagi Design. 98 Amateur Antennas : The Comet GP15 tri-band, single section, fiberglass vertical base antenna is for 6 meters (5/8 wave), 2 meters (5/8 wave x2) and 440 MHz (5/8 wave x4). You should be able to find most of the materials at the nearest building supply center or neighborhood hardware store. Why "poor radioamateur's mobile antenna"? Well you can buy the DV27 very often second hand, I even saw them on eBay for only 14 euro. Items 1-12 of 65. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. The antenna is bearing 292,5 degrees (west north west) towards the United Kingdom and Ireland. Be sure your antenna length is measured up to 1,25 m. 2m and 70cm Portable Beam for ARES This article discusses the construction of an inexpensive, portable, 2m and 70cm Yagi antenna for ARES field operations. The tips of the antenna are folded back until they almost meet at the feedpoint, such that the antenna comprises one entire wavelength. this is the best dual band j-pole ever built. Enhancing Omnidirectional NVIS and DX for the Alpha HD-FMJ and ProMaster Antenna. 2M ( 144Mhz ) 70CM (430 Mhz) Coax Collinear. Photo: EA5FUZ The X-Quad is an improved design of the well known multi element quads. Tram(r) 1477-B Pre-Tuned 144mhz-148mhz Vhf/430mhz-460mhz Uhf Amateur Dual-Band Base Antenna (Black Fiberglass), 44. Let's take a look at some of the things Randy and I considered for his antenna project and wrap up with a description of his solution. Follow us on Facebook JETSTREAM JTPS32MAB 30 Amp Power Supply $79. Compact and effective 2m/70cm dual band antenna for satellite operation Building the UHF Cheap Yagi for Satellite Communication Station Buy motorized crossed yagi antennas solution is the best solution but certainly not the cheaper ! Your choice can be a LEO-Pack Antenna System distributed by Amsat. 2 mm diameter (1/8”) 5Element 2M/70cm Yagi 2M SWR Curve 70cm SWR Curve. Figure 3: 2m dipole or J-pole (free-space) vertical radiation. An impression of the 2m/70cm situation in the attic. I then began research on what it would take to make this antenna perform well on 2m and 70cm. The pole is made of pvc, 5cm in diameter. 5 dBd on 70cm bands and it is fed via single 5. 6M/2M/70cm Vertical. If you want to upgrade your 2m/70cm mobile handset with a greatly improved antenna I personally recommend the ExpertPower XP-669C if you need something compact and the Retevis RHD771 at all other times. Multiband Antennas are antennas that can be used for more bands at once, thus they are very practical. If you prefer to make a 70cm version (432 MHz), cut two additional wires each 165 mm, excluding the short section in the binding post. However, the resulting im-pedance at the overall antenna feed point A Simple Fixed Antenna for. Call or Text: 574-575-6787. Homebrew cavity resonator/duplexer for 2m repeater There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. Voltage Balun. 6m/2m/70cm Yagi Antenna Built from Old TV Antenna by KGØZZ This turned out to be a great little antenna. It SHOULD handle UV and different weather conditions pretty well. Matching is excellent on all three bands and can be tuned independently. With a boom of just 2m and F/B in excess of 20dB including full-band coverage, this is a super-compact Field day antenna! 4 x 24el 432MHz LFA @ PA2V PA2V selected G0KSC LFAs (built by InnovAntennas) when he wanted the very best in EME performance!. Measurement results for the S11 (or SWR) a. Instead of using stainless steel for the elements, he used brass. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. 03 twinlead Quarterwave Vertical is: 4. Umbrella Antenna Ideas. Based on Rothammel / DL6WU You may want to combine it with a folded. Having purchased an all-mode, all-band (160m - 70cm) transceiver, I became curious about what 2-meter weak signal operations have to offer. Add to Watchlist Unwatch. The antenna offers a gain of about 10 dB, is lightweight, mechanically strong and rivals the performance of similar commercial antennas. 95: YAESU FT65R 2m/70cm HT $79. 2 element 3-band mini beam. BTV - MLA-M. After many requests for a dual band version of this antenna. It measures at 5. Yagi with 5 Elements on 2 m, 8 Elements on 70cm and one Feedpoint. I made mine out of welding rods and connected to a choc block, so all can dismantled very easy for portable work. uk 01922 414796, for all your Diamond 2m/70cm Dualbander antenna needs. schemas/yagi_vhf_antenna. homemade shortwave wire antennas: G5RV/ZS6BKW ANALYSIS and 5 BAND OCF-DIPOLE - NOVEMBER 2013 HV7CX mobile whip QRV on 9 bands: Modification of HV7CX for 40,20,15,11,10,6,4,2m and 70cm - NOVEMBER 2013 my homemade 2m preamplifier:. Irony is the 70CM side works great, before and after taking the entire antenna apart and putting it back together again. Super J-Pole Aaron Schmitz KB0YKI. 18-16 to 18. 99, plus tax, you get a 70-inch-long by 1-inch-square boom, a set of six 3/ 8-inch-. Construction Plans for the Model J146/440. This link is listed in our web site directory since Sunday Sep 16 2018, and till today "Homemade 2M/440 J-Pole Antenna" has been followed for a total of 467 times. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. HF Antennas. 1 db gain and I can work all the local repeaters and about 15 miles simplex with the antenna sitting on the BASEMENT floor. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. A quater wave antenna's radiation pattern like a dome. Elk Antennas 2M/440L5 Dual-Band Antenna $ 129. cb antenna mounting location. It measures at 5. VHF Hand Held Radios. long, the booms are made from 1. It offers the lowest angle of radiation of any mobile VHF antenna and may very well be the best kept secret among those in the know. DIY 5$ Portable VHF Yagi Antenna for the 2 Meter Band (144-146 MHz) by F4HWK: In this publication i explain how to build a very light weight, cheap, easy to build and deployable in 30 seconds portable VHF antenna for the 2 meter band. 5 Band Hexbeam. With 1 watt, it will reliably hit a repeater 29 miles away (furthest repeater not blocked by terrain). HYS YAGI Antenna High Gain 9dBi UHF 70cm Base Antenna UHF 400-470 MHz 5 Elements Antenna for Motorola Repeater Kenwood Baofeng 2-Way Radio 4. the "ll cool j" 2 meters for a song. left, diagonal). 20161121 70cm / 2m white stick antenna. Handheld 2m/70cm Antenna - Ultra Gainer With SMA (Plus Short Back Up Antenna) £22. The second 2m/70cm antenna is QRB-300 duobander GP type antenna (Gain: 6. Super J-pole 9 feet tall N2UHC. 2 dB, 1kw N connector Complete Oscar SAT. Frequency Range 1920 MHz to 1980 Length 4. A stainless steel M3 stud is cheap, I pay only 2-3 euro for 1 meter of it. Seen as a 2m half wave antenna, the piece of undamaged cable jacket in the middle does not really play a role. It works the 6 meter, 2 meter and 70 centimeter bands. Unlike the compact internal antenna on a USB modem or cell phone, a Yagi's driven element is large enough to be fully sensitive to the frequencies of interest. Then , TA TA. Specifications: Length: 51. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. The antenna has good reflection coefficient and VSWR ratio @ 1. Binnenshuis fietspompantenne 2m-70cm. One connector for VHF and one for UHF. pdf - from January, 2012 QST magazine. Dual Band VHF/UHF Slim Jim Antenna. If you want to really reach out and maximize your 2 meter and 70 cm radios you’ll want to find a good base station antenna for the shack. Here's some quick tips and tricks that may help you get on the HF bands with an indoor antenna. 2m dual band (70cm/2m) antenna on the chimney – a generic one thats a bit like the Diamond antenna white stick – called an X200 For some strange reason the 70cm repeater that…. 1_ SMA Male Antenna of your Choice. No Antenna Required for out of box tune. 2 Reflector for 70cm 329 mm 110mm 3 Radiator 2m and 70cm 977 mm (4mm) 260 mm 4 Director 1 für 70cm 322 mm 300 mm 5 Director 2 für 70cm 320 mm 440 mm 6 Director 1 für 2m 935 mm 470 mm 7 Director 3 für 70cm 285 mm 750 mm 8 Director 4 für 70cm 297 mm 965 mm 9 Director 2 für 2m 915 mm 985 mm. pattern (black) and the same antenna on 70cm (red). For years I've thrown together simple antenna tuners to get me on the air when needed. The Portable Or Base 2m 70cm Copper Pipe J Antenna By N6jsx. Photo: EA5FUZ The X-Quad is an improved design of the well known multi element quads. 170 mm will be a good start point. The caps are optional and are for the prevention of mud dauber nests. 9 Ohm feed! For the cost about 0. Because of the intricate tuning, we only sell this antenna with the pvc pipe. Handheld 2m/70cm Antenna - Ultra Gainer With SMA (Plus Short Back Up Antenna) £22. A dipole is basically a length of conductor (wire) split into two portions and signal is taken off at the split. UHF Base Antennas. Length Foot Wind MPH; X30A: 2m / 70cm: 2m: 1 1/2l 70cm: 2 5/8l: 3. • The full-wave antenna is voltage fed, so it readily takes all the available power from the stub, however the phasing of the currents in the two half-waves actually moves the angle of maximum. When you found the "sweat" spot solder the the centre to the coil. They are very easy to build and will perform better than the antennas that come with most handhelds. 2M Slim Jim antenna using Aluminum Tubing. Slide three FT50-43 or almost any similar sized toroids over the bottom end of the coax as shown in Figure 3. The larger the wire, the wider the bandwidth. Both of the bands, 2m and 70cm, can be operated simultaneously by using optional antenna duplexer. Elk 's Log Periodics. antenna forum (off site) publish your antenna project all band "ugly" balun antenna programs de ve3sqb qy4 quick yagi program qrz design downloads k5at antenna links wave propagation antennas "the easy way" get a good ground! arrl technical info service how to use an antenna tuner basic yagi design decimal conversion chart try out that 40m antenna. I decided to build the simplest of our four Yagi antenna first - the M2 Antenna Systems 440-21 ATV. 2 dB, 1kw N connector Complete Oscar SAT. 5 - 1 across both bands with 55 watts input. A dipole is basically a length of conductor (wire) split into two portions and signal is taken off at the split. Free 2-day shipping. The quarter-wavelength, ground plane antenna is made up of one vertical element, called the driven element, and four radials. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. By John Portune W6NBC. At this frequency, this antenna is getting very practical and easy to build. 0 mHz and ~445. The Nagoya NA-701 is a dual band 2m/70cm antenna for your Baofeng or Wouxun HT two way radio. While an amateur license is required to transmit on the 2 meter and 70 cm bands, the MURS frequencies are unlicensed. Double Bazooka NVIS Antenna Calculator. Horizontal radiation is on the left, vertical on the right. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. 65 USD for 6. On 40m to 160m, the op-amp can still be avoided but calibration of the meter for correct SWR reading can't be achieved. 180 uplink CTCSS 67Hz and 145. is a company specializing in electronic product design engaged heat, manufacture, sale,OEM business and provides OEM manufacturers, the company gathered a number of. Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. Fortunately there is an antenna that is inexpensive and simple to build with a minimum amount of parts and tools. The first antenna that you should consider building is the quarter-wave ground-plane antenna for the 2m band. DBJ-1 Dual Band VHF/UHF 2 meter/70cm ham base antenna. Homemade 2M/440 J-Pole for $35 – KK4ICE Duoband-Yagi 2m/70cm with 2/3-elements. This is a temporary set up as I have just bought a full size duel band mobile antenna and mag mount. UHF Base Antennas. The Portable Or Base 2m 70cm Copper Pipe J Antenna By N6jsx. 7:1 at band edge. Manufacturer Tram Product Description 2M/70cm 5/8 Wave Antenna Frequency (MHz) 144-148 & 440-450 Product Narrative Base loaded Dual Band High gain antenna Usable Bandwidth 4/10 MHz Gain (dB) 3/6. Being the crafty maker type, I wanted to build my own antenna. Some Notes on the Slim Jim Antenna – M0UXB. M2 Antenna Systems, Inc. A little while ago (about 6 years to be exact) the best antenna I had for 145MHz was the 1/4-wave mag-mount antenna on the roof of my car. com in a single category. I've just acquired a Nelson Antennas roll-up antenna which is superb. the SIMPLE 2m/440 Copper pipe "J" by Dale “Kuby” Kubichek, N6JSX 03/2001&2008 Can you use a pipe cutter or a hack saw, can you solder – then here is how to build a SIMPLE ”J” antenna that will more than double your 2 meter (and even 440) performance! The "J" antenna goes back many years, long before I became a ham. Each radial is evenly spaced (90 degrees apart from each other) around the vertical element. Free shipping. My setup consists of an HT in a pouch, attached by MOLLE straps, but I haven't settled on any antenna setup quite yet. Building a Quadrifilar Helix Antenna for Undergraduate Researchers Introduction There are many different antenna designs for capturing images from weather and other low-level, non-geosyncronous satellites. I settled on a 2 meter vertical dipole. This antenna is not as good as advertise review by Ex customer on 8/17/2014. CO LINEAR ANTENNA DESIGN While it is not possible to home-brew a commercial quality antenna, it is very feasible to build a collinear antenna for average use. The SWR on 70cm is better in the range 430-438MHz. the "ll cool j" 2 meters for a song. I have used my Baofeng with a UHF cheap yagi design, a 3-element tape measure yagi, and a UHF IO antenna and all of them have worked well with the Baofeng. This article covers several 145 MHz antennas, a larger number of 435 MHz antennas, and how to combine them into one antenna. 5 -2 inch Max power: 200 watts, sum of both bands Max wind rating: 90 MPH Construction: Fiberglass One piece contruction. For receiving above 438MHz the antenna is good enough! So we have 2 elements on 2m and 3 elements on 70cm. 25m, and 70cm 6-EL OWA Yagis on one rotator driven mast. Handmade Slim Jim Antenna by. While you can pick these up with a standard scanner antenna, reception is much better with a directional antenna. The radiation diagram of my loop antennas change a bit. And a 21 x 21 crossed Yagi on 70cm. This is a simple and quick design for a collinear antenna. 5" Features: 144-148Mhz 440-450Mhz 4. antenna which covers the VHF (2 meter), 220 MHz, and 70cm amateur band. With 1 watt, it will reliably hit a repeater 29 miles away (furthest repeater not blocked by terrain). The 432MHz band used to be one of my favourites. design a j pole for any band. Items 1-12 of 65. Total height 5ft 8 inches. Took him 45 minutes and cost him $12. I decided to build the simplest of our four Yagi antenna first - the M2 Antenna Systems 440-21 ATV. Sign in to check out Check out as guest. The Antenna Farm : UHF/70cm Yagi Antennas - 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 Connectors Aviation Radios Repeater Systems Towers & Accessories Duplexers Diplexers & Triplexers VHF & UHF Base Stations Base. 2M Slim Jim antenna using Aluminum Tubing. Cb Antenna Base Station. Some Notes on the Slim Jim Antenna - M0UXB. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. The antenna's low cost is made possible by modifying a RadioShack FM broadcast receiving antenna (RS 15-2163). 0dB, Lenth: 2. antenna element alone connects one ele-ment to the next. 50 mhz converter magic band using an NE602/612. For those of us who are using 70cm (430-470MHz) Amateur band tracking/telemetry transmitters, I found some interesting low-cost DIY antenna projects. Antennas And Antenna Kits - Dl. Cheap LEO Antenna Drew, KO4MA, using the Cheap LEO antenna during a Dayton AMSAT LEO Demonstration Hand held dual band antennas are popular for QSO's through many of the Low Earth Orbit (LEO) satellites. The antenna park:. 5Element 2M/70cm Yagi 2M Azimuth Plot 2M Elevation Plot EZNEC 5 plots at 10’ elevation above medium ground. Mast Mount 2m / 70cm Vertical Dipole Antenna. It works great!. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. ATF-531P8 E-pHEMT is more reliable than low power ATF-54143 …. It was invented by John D. On UHF site, a bit narrow la , 432-437 Mhz below 1. WB2HOL 's 2M Tape Measure Beam (used mine to work the ISS!)--Tape Measure Beam KITS! W6NBC' s 2M/70CM Tape Measure Beam Project -. Operates without radials. An example: a 2m J-Pole antenna can be tuned to the 70cm band (in other words it can have an SWR approaching 1:1), but the angle of attack (radiation pattern) of such an antenna is so bad that it. This may be the best 6 meter vertical antenna you will find. The domain uhf-satcom. It requires no radials, is totally weather protected, and only 5 ½ feet tall. If you want to upgrade your 2m/70cm mobile handset with a greatly improved antenna I personally recommend the ExpertPower XP-669C if you need something compact and the Retevis RHD771 at all other times. This horizontal "slot" antenna, cut into the reflector of a TV dish, is both the master of disguise and high in performance. Building the J-Pole antenna (PVC covered) KA1FSB. 5cm Gain: 2. A Simple 2 m/70 cm Vertical Dipole Antenna This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. This antenna is peaked for 432. Diy 2m 70cm Mobile Antenna Projects. 50-Ω-Impedance, fed with a 50-Ω-coax-choke (look for the pictures). Jan 12, 2016 - measuring tape yagi 2m 70cm - Google Search. It requires no radials, is totally weather protected, and only 5 ½ feet tall. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. Dec 5, 2014 - Two DIY dual band antenna's I built for VHF/UHF. For details: http://www. 8 GHz WLAN WiFi Antenna FM - TV Antenna Amplifiers Diplexers Ham Radio. 25GHz PowerPC G4, 2GB DDR RAM, running MacOSX and HamLoggerDX. Diamond RH951S 2m/70cm/23cm Antenna Our Price: $42. Antenna was designed by Kent Britian, WA5VJB, and full credit (and blame) belongs to him on this design! This antenna is ideal for rovers, and is good for a fixed station on a budget. 7dB COLINEAR ANTENNA by Harry Lythall - SM0VPO. antenna element alone connects one ele-ment to the next. This is a simple and quick design for a collinear antenna. 100 MHz, which just happened to both yield a length of 19. Even a 6-meter Yagi at 100 feet has a take-off angle of 2. Raising or lowering the antenna can help with SWR, but also one more thing to keep in mind, It's a good idea to raise the antenna at least 1/4th wavelength above ground. UHF Hand Held Radios. Using and SWR meter or an antenna analyzer, test for a good SWR on the two meter band. HYS YAGI Antenna High Gain 9dBi UHF 70cm Base Antenna UHF 400-470 MHz 5 Elements Antenna for Motorola Repeater Kenwood Baofeng 2-Way Radio 4. 2M Moxon Antenna: I tried my first contest recently (RSGB 2M UKAC) and really enjoyed myself, although I realised just how restrictive my J-Pole antenna was when it comes to SSB and directionality so I build this little moxon antenna using details provided by G0. N5WVX 2M 7 Element Yagi. If the antenna strikes a low hanging garage opening or other obstacle it simply flexes no damage done. Next secure each 1/4 wave element in the binding post. Uncategorized. Suggestions for a dual band 2m/70cm antenna for mobile use Discussion in ' VHF/UHF - 50Mhz and Beyond ' started by KC0BUS , Jul 12, 2017. Antenna was designed for SO-50 satellite operation. This lightweight antenna is perfect to use for fox hunts or as a portable directional antenna for public service events. edition of the ARRL Antenna Handbook covering Open Sleeve antennas to make Broad band antennas. Ground-plane Antennas for 144, 222, 449 MHz ARRL Antenna Book, 18 th Edition, pp. Portable 2m 144 Mhz Coaxial Dipole Antenna Get Out Of The. It shows the size and position. VHF Hand Held Radios. 5 dBd on 70cm bands and it is fed via. A stainless steel M3 stud is cheap, I pay only 2-3 euro for 1 meter of it. Powered by our patented technology that provides the highest quality and most reliable system on the market, we are pleased to support your communication needs. 5 out of 5 stars 8 $49. 2M Square Dipole Construction. Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. I'd like to make (or purchase) an antenna suitable for portable operation, capable of being mounted, or at least carried, on a backpack. When I tried running 100 watts to my 2 meter omni antennas, severe desense blocked my 70cm downlink receiver. Amateur Base Antennas : Arrow: CR 146/440 Corner Reflector 2m/70cm: GP 52 Vertical 6m: GP 146 Vertical 2m: GP 146/440 Vertical 2m/70cm: OSJ 146/440 Vertical 2m/70cm: Chameleon: MIL Vertical 10m-6m : HYBRID Fixed Vehicular 160m-6m : HYBRID-MICRO Fixed Portable 160m-6m : Comet. 20161121 70cm / 2m white stick antenna. Perfect gain and SWR on both bands. I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. I made the second one specifically for on the road mobile use in a fiberglass body RV which has little to no ground-plane available so a conventional 2m mobile antenna would have several difficult issues to overcome (if even possible). Why "poor radioamateur's mobile antenna"? Well you can buy the DV27 very often second hand, I even saw them on eBay for only 14 euro. You can alwys fine tune the antenna for best SWR by sliding in or out the top tube of the antenna. 9MHz (centre of 2m 145. If the antenna strikes a low hanging garage opening or other obstacle it simply flexes no damage done. Make your own. E2 Plug'n Play 144 432 MHz 2M 70CM FM QRO CHOKE BALUN ANTENNA RG401 2kW PL259. The main category is J Pole antenna plans that is about Building J-Pole amateur radio antennas. Wayde used a commercial NMO-style base and magnetic mount. 5 cm Connector Type SMA(m) 2000-1487 Telescoping whip antenna, with knuckle elbow. The Antenna Farm : UHF/70cm Yagi Antennas - 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 Connectors Aviation Radios Repeater Systems Towers & Accessories Duplexers Diplexers & Triplexers VHF & UHF Base Stations Base. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. Elk 's Log Periodics. Of course, the nature of gain might mean that a directional antenna may bring in *less* interfering signals if those signals come from directions other than the way your antenna is pointing. 95 Until 06/30/20: YAESU FT2980R 80W Mobile 8. The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. WBØTGE’s “Mighty Woof” – 2m/440 MHz Dual Band Fan Dipole This article was submitted to HamRadioSchool. Using and SWR meter or an antenna analyzer, test for a good SWR on the two meter band. dual band antenna 2m 70cm Applications: * 2. put your junk antenna parts to use. Parts Needed. 8 GHz WLAN WiFi Antenna FM - TV Antenna Amplifiers Diplexers Ham Radio. The main advantage of this arrangement is an improved bandwidth over a standard half-wave dipole. To keep costs down, coax is soldered directly to the board and you can use heatshrink or the Yagi boom itself as a case. The antenna has good reflection coefficient and VSWR ratio @ 1. The Yagi has three forward lobes (according to the three current maxima in the 3/2-lambda-radiator) with 5,39dBd - 4,35dBd -5,39dBd gain. The normal quarter wave ground plane antenna consists of a vertical radiator which is insulated and centered between 4 horizontal surrounding radials which extend out from the base of the antenna. One warning about external antennas: convert from big coax down to smaller coax and a BNC or SMA plug near the HT instead of using the big coax with an adapter; a PL259 to BNC/SMA adapter may tear the bnc/sma plug from the. If you decide to make a 2m antenna, you'll end up with 1. Popovic Fonte: Rivista Radio Amateur "Beam" (maggio 1988), descritta anche in precedenza da DL4KCL sempre sulla rivista "Beam" Caratteristiche dell'antenna: • Dual Band 2m/70cm • bassa resistenza all'aria • Facile da fare • Installazione semplice e veloce L'antenna funziona come ¼ lambda per i 2 metri e, come 5/8 lambda per i 70 cm. The antenna’s low cost is made possible by modifying a RadioShack FM broadcast receiving antenna (RS 15-2163). Antenna for 70 cm 432-440 MHz category is a curation of 55 web resources on , Experimental Patch Antenna, 432 MHz 5 elements Yagi, DG7YBN - GTV 70-2m. 6mm 25mm square steel tube. J Beam Project 2 Meters and up N3SDO. uk 01922 414796, for all your Diamond 2m/70cm Dualbander antenna needs. On my site you can find both the all copper 2 meter J-Pole antenna and an all copper 2 meter Slim Jim antenna. One connector for VHF and one for UHF. It works the 6 meter, 2 meter and 70 centimeter bands. I have home made a j-pole for 2m, and a neat little ground plane antenna for 70cm, both of which show an SWR under 1. (no line of site but about 20kms suburban downrange ) This all metal 2M yagi will supplement the 70cm aerial and also serves as a test project for all metal yagi design. After many requests for a dual band version of this antenna. NEW LIMITED SPACE 160 THRU 70CM ANTENNA MARVEL PROJECT! KB0YKI ANTENNA DESIGN Various antenna types-off site. Manufacturer Tram Product Description 2M/70cm 5/8 Wave Antenna Frequency (MHz) 144-148 & 440-450 Product Narrative Base loaded Dual Band High gain antenna Usable Bandwidth 4/10 MHz Gain (dB) 3/6. The antenna in the main picture is a 6m Half Wave endfed. It is a roll up, J-Pole/Slim Jim antenna. If we look at antenna books and articles about quad antennas, we will often find references to quad antennas having 2 dB gain over a comparable boom length yagi antenna. 0dB, Lenth: 2. Since my article on Simple Wideband Yagi's appeared in September AR I have had a number of people contact me advising that it would be better to use the grey electrical conduit rather than the orange version I did. , 420-450 MHz Nano Wheel 33cm - 2oz, 6. The caps are optional and are for the prevention of mud dauber nests. Most people make these for 2m use, but you can make them for 70cm use if required. A 2-Meter Vertical Dipole Array, KG4JJH Page 2 of 6 three ½ inch unions, and 12 inches of ¼ inch PVC pipe (0. But if you've never done it, you probably have a few questions. They are very easy to build and will perform better than the antennas that come with most handhelds. Comet's BEST DualBand Mobile Antennas 2M/440MHz high gain antenna Gain& Wave: 2M: 5/8 wave 4. I homemade this antenna spending 0 €, recycling two old VHF TV antennas and a broken clotheshorse and a piece of wood. Switching over to the repeater area of 70cm, it was even lower, 1. 2m 6m 20m 30m 40m 70cm 80m 160m amateur radio android Angusvale bias tee BlueVNA Bush Search and Rescue Victoria Camping colinear antenna common mode currents contesting CW CW rig digital modes Eagle Peaks elecraft kx1 End fed antenna FM FT-817 FT-897 Hobbyking HT Internal FT-817 Battery ipad iphone John Moyle Field Day kx1 LiPo Minicircuits. The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. Wrapping the coax around the 3/8 fiberglass pole about ten times was good enough to reduce the match to 1. The actual antenna portion of the pipe is going to be 560mm (22″) tall, but you will need to put a cap on the top of the pipe and also have some tubing protruding below the antenna portion for mounting. com, mainly located in Asia. The 70 CM band may be limited. Make a 2 kW Windom Balun. 2 meter/440 "j" using cb whipn6jsx. Quarter wavelength at 145. I'm getting 1. In understanding the basic Yagi antenna theory, the different elements of the Yagi antenna react in a complex and interrelated way. UHF Hand Held Radios. Built with same materials by the hundreds. The antenna is dual banded to operate on 70cm using the same sleeve technique as used on the dual-band basic Flower Pot. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). TM-71A Dual Band Ham Radio Larson 70CM/2M Antenna Uniden 520xl CB radio 3' Firestik Adjustable tip antenna Pioneer DEH-P9400BH HU. To keep costs down, coax is soldered directly to the board and you can use heatshrink or the Yagi boom itself as a case. Voltage Balun. Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. right, circ. Why "poor radioamateur's mobile antenna"? Well you can buy the DV27 very often second hand, I even saw them on eBay for only 14 euro. I got lucky, because I was using 147. The Arrow II line of Antennas has been engineered to provide maximum gain and efficiency in the smallest practical size & weight. homemade 2 meter antenna - Google Search Slim-Jim 2m Antenna. hb9abx archive. HYS Dual-Band 9. Dipoles need to be half a wavelength long, locating these long antennas can be an issue, especially when we are aiming for the 80 metre band or lower. It was invented by John D. Specifications FREQUENCY: 144-148. Don't forget the Driven element ( red ) is cut in the centre. With 1 watt, it will reliably hit a repeater 29 miles away (furthest repeater not blocked by terrain). View as Grid List. 20161121 70cm / 2m white stick antenna. Whether you're operating on 2 meters or you work in the 1. Portable 2m 144 Mhz Coaxial Dipole Antenna Get Out Of The. Here i present all steps to build this antenna. There are usually four radials, three being a minimum, but you could use up to six. On the other hand, by switching to REFlected, an antenna can be tuned by simply finding the minimum reading. 2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. 2m 6m 20m 30m 40m 70cm 80m 160m amateur radio android Angusvale bias tee BlueVNA Bush Search and Rescue Victoria Camping colinear antenna common mode currents contesting CW CW rig digital modes Eagle Peaks elecraft kx1 End fed antenna FM FT-817 FT-897 Hobbyking HT Internal FT-817 Battery ipad iphone John Moyle Field Day kx1 LiPo Minicircuits. 4dBi 70cm: Two 5/8 waves in phase, 6. 2 meter/440 "j" using cb whipn6jsx. Diamond Base Antennas. The array can be used without a rotator if one direction is primarily used. The half wave 2M version of the Flower Pot antenna is easily modified to a dual band antenna for operation on a band that is the [approximate] third harmonic of the fundamental resonance. Diamond RH951S 2m/70cm/23cm Antenna Our Price: $42. I made mine out of welding rods and connected to a choc block, so all can dismantled very easy for portable work. (no line of site but about 20kms suburban downrange ) This all metal 2M yagi will supplement the 70cm aerial and also serves as a test project for all metal yagi design. With 1 watt, it will reliably hit a repeater 29 miles away (furthest repeater not blocked by terrain). After browsing the various Internet antenna construction sites in search for the best portable satellite antenna for the V/U and U/V modes, I figured I could build something good. 95: ICOM IC9700 2m/70cm/1. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands. Alex Diaz ' Homebrew Yagis. I wanted to make something simple that would be reliable and not require a balun or any impedance transforming, so I decided to build a quarter wave ground plane antenna for home. 5 Element Dual Band (2M/70cm) Yagi Elements are 3. 95: ICOM IC9700 2m/70cm/1. One is the system with the solution earlier mentioned in a form of a switch provided by a manufacturer or homemade. Only About 19 oz. Compact and effective 2m/70cm dual band antenna for satellite operation Building the UHF Cheap Yagi for Satellite Communication Station Buy motorized crossed yagi antennas solution is the best solution but certainly not the cheaper ! Your choice can be a LEO-Pack Antenna System distributed by Amsat. This gave about +3. Coax cable is routed through the bottom ¼ lambda element, thus no balun is needed - the sleeve is actually the balun. uk 01922 414796, for all your Diamond 2m/70cm Dualbander antenna needs. Seen as a 2m half wave antenna, the piece of undamaged cable jacket in the middle does not really play a role. The antenna seem to be composed of a reflector dish for 2M and a yagi for 70cm. Wayde used a commercial NMO-style base and magnetic mount. Simple Quarter Wave Ground Plane. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. cb antenna mounting location. A Simple 2 m/70 cm Vertical Dipole Antenna This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. 000 Mhz VHF; Build 4 Elements Yagi. We provide a broad range of RF antenna solutions for. The 2 Meter 10 element collinear has a whopping 13 dBd gain (more than most Yagi types. You probably noticed that there's a stick protruding from the bottom of the PVC support. 2 meter/440 "j" using cb whipn6jsx. the SIMPLE 2m Copper pipe "J" byDale "Kuby" Kubichek, N6JSX /8 03/2001 (To download a printable ms-word format file of thisarticle, click here). With 1 watt, it will reliably hit a repeater 29 miles away (furthest repeater not blocked by terrain). Handmade Slim Jim Antenna by. Enter one (only one) value, the desired frequency or the antenna length in any length field. Why "poor radioamateur's mobile antenna"? Well you can buy the DV27 very often second hand, I even saw them on eBay for only 14 euro. The quarter-wavelength, ground plane antenna is made up of one vertical element, called the driven element, and four radials. Jetstream JTB3 2m/70cm Dual Band Antenna - Length: 71. That means that you can get reception both on UHF & VHF frequencies. 5cm Gain: 2. Free Online Engineering Calculator to find the Dimensions of a Logarithmic Periodic Dipole Antenna for a given Frequency Range and Length. An impression of the 2m/70cm situation in the attic. All antenna elements are made from ¼-inch diameter aluminum rod and are isolated from the boom using tubing clamps. On the other hand, by switching to REFlected, an antenna can be tuned by simply finding the minimum reading. edition of the ARRL Antenna Handbook covering Open Sleeve antennas to make Broad band antennas. dual band antenna 2m 70cm Applications: * 2. This lightweight antenna is perfect to use for fox hunts or as a portable directional antenna for public service events.