Note: Just to be clear, most of the images show for the 2-meter band. In this case there is seven 1/2 half wave elements, plus 1/4 wave ones on the top and bottom. For other bands (i.e. 1 1/4 meters) there will be a few more 1/2 wave elements in the middle. ... Take apart the old guts of the commercial antenna you got and put the new antenna ...DIY 2M Ground Plane Antenna. October 18, 2021. DIY 2M Ground Plane Antenna - Ham Radio - TheSmokinApe. Here's a simple, inexpensive way to improve the performance of your 2 meter gear, including your HT. Thanks to "TheSmokinApe" youtube channel for this easy-to-make 2 meter ground plane antenna. This antenna can be used at home or in the field.The pandemic has spurred interest in saving and investment apps around the world, especially ones geared toward newer investors. In Southeast Asia, startups in this space that have...Here is a simple 2-element quad for 2m that is easy to build and does a good job. It works well for extending the range of an HT, transmitter hunting, SSB, or general use. When not in use it comes apart for storage. The SWR is less than 1.5 : 1 across the band from 144 to 148 MHz without any tuning. The boom can be rotated for either horizontal ...16 Dec 2023 ... DIY Dual Band Aerial. 70cm & 2m Ham Radio. Part 4. Final Test Results. · Comments.146/437-14 Alaskan Arrow Satellite Antenna (PDF) 146-4 (PDF) 146-4BP (PDF) 146-3 (PDF) 220-3 (PDF) 121.5-3 (PDF) 121.5/406-10 (PDF) 437x14 (PDF) 440-3 (PDF ... (PDF) , SWR Chart , 2 Meter Rad. Plot , 70 cm Rad. Plot About SWR OSJVHF (Business Band, Marine, & MURS) (PDF) , SWR Plot About SWR OSJ 155/460 (Search Rescue) (PDF) OSJ 152/462 (MURS ...As far as the radiating elements they are. 2M=19.5” 70cm=6 5/8”. This is measured from the lowest point of the U to the tip. Where your coax splits and connects to the elements is where the antenna length will be. Leave about 1” gap so you can move them in and out to tune with swr meter. Awesome, thank you.Make one for your "go-kit" or even for the next ARRL Field Day. KB3TQO does a good job of designing and making this simple, effective antenna for the 2 meter and 70 centimeter bands. "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. Cheap and easy."146/437-14 Alaskan Arrow Satellite Antenna (PDF) 146-4 (PDF) 146-4BP (PDF) 146-3 (PDF) 220-3 (PDF) 121.5-3 (PDF) 121.5/406-10 (PDF) 437x14 (PDF) 440-3 (PDF ... (PDF) , SWR Chart , 2 Meter Rad. Plot , 70 cm Rad. Plot About SWR OSJVHF (Business Band, Marine, & MURS) (PDF) , SWR Plot About SWR OSJ 155/460 (Search Rescue) (PDF) OSJ 152/462 (MURS ...Oops, I tried to make a 70cm loop just playing around and presto!!! A 2m very wide banded loop antenna.Build a 2m VHF lightweight sleeve dipole antenna. A compact portable antenna and easy for deployment. You can even operate the dipole while holding it. Building it is easy just follow the antenna plans below. The antenna specifications are below including the testing video. Wiring the Feedpoint. Antenna Measurements.For this project, you will need: 1″ OD diameter PVC pipe at least 3 feet long. Steel retractable tape measure. Coaxial cable. USB RTL-SDR module with antenna for testing. Computer running CubicSDR software. Solid-core wire (just a small piece) Soldering iron & solder. Flush diagonal cutters.Welcome to an exciting new chapter in amateur radio technology! I'm thrilled to introduce the 'Fara-J' – a cutting-edge 2m-70cm ham radio antenna crafted from Faraday cloth.A simple ham radio 2 meter and 70 cm antenna for fixed or portable use. For details: http://www.amateurradio.bz/2m-70cm_vertical_dipole_antenna.htmlFigure 3: 2m dipole or J-pole (free-space) vertical radiation . pattern (black) and the same antenna on 70cm (red). Fortunately, there is an easy solution. Install 70cm stubs on the 2m antenna to create a good UHF radiation pattern. Many commercial HF antennas use this technique to achieve good patterns on their multi-band antennas.Antenna, Yagi Beam, 2 Meter/70 cm Wideband, 10 Element, 6.10 ft. Boom Length, 350 W Power Rating, Each. Part Number: CSH-A27010S. 3.8 out of 5 stars. Estimated Ship Date: Tuesday 5/28/2024. Free Shipping; Documentation...Loading Estimated Ship Date: Tuesday 5/28/2024. Free Shipping;This dual band (2m/70cm) antenna is easy to build and will give you a bit more gain than a 1/4 vertical whip. This variant of the popular "Slim Jim"/"J-Pole" …My homebrew 2m/70cm coax dipole antenna, made from 5 meters of rg8x coax cable, works pretty well.Here is a simple 2-element quad for 2m that is easy to build and does a good job. It works well for extending the range of an HT, transmitter hunting, SSB, or general use. When not in use it comes apart for storage. The SWR is less than 1.5 : 1 across the band from 144 to 148 MHz without any tuning. The boom can be rotated for either horizontal ...Not so long ago I built my version of The Home-Brew SKYLAB Starduster for 26 - 30MHz, Super simple to build with just 10 metres of wire and a length of coax....Here is a simple 2-element quad for 2m that is easy to build and does a good job. It works well for extending the range of an HT, transmitter hunting, SSB, or general use. When not in use it comes apart for storage. The SWR is less than 1.5 : 1 across the band from 144 to 148 MHz without any tuning. The boom can be rotated for either horizontal ...The first reference that caught my eye was the $4 Ham Radio Satellite Antenna. I saw this web page a couple months ago, and was thinking about building it, but haven’t gotten around to it yet. It looks like a very cool and easy project. One thing I was wondering about is why the 2m and 70 cm elements aren’t perpendicular to one another …Feb 27, 2015 · Here’s a small 2m / 70cm diplexer that is good for up to 10W of power, perfect for working satellites with a HT. The design comes from KI0AG and was originally published in the November-December 1997 AMSAT Journal. It consists of two Chebyshev low-pass / high-pass filters designed for the 2m and 70cm Amateur Radio bands.The SWR on 2m is 1.6 @ 144mhz and 2.2 @ 148 mhz following your measurements. Although I can not get anything out of the 70cm side. There is a repeater I can open with a HT with a rubber ducky antenna standing at the antenna location but it will not open it up through the antenna.. I do not have the equipment to check the SWR @ 70cm though.Now its time to add the additional elements to the top and bottom of the collinear array. First add a ¼ wave element to the top of the antenna as shown in Figure 3. Use #16 solid wire or similar and solder it to the center conductor only. The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4.A 146 Mhz J-Pole Antenna - A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to bu... A J-Pole for 2-meters and 70-cm - An Easy Dual-Band VHF/UHF vertical Antenna made with a TV twin lead an... Simple j-pole antenna for 2 meter - how to build a J-pole antenna for 2 meter band with many photos ecc....2m-70cm antennas - map of st.lucia - about me - contact me . 2m-70cm antennas. vhf - uhf band plan chat j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. this is the best dual band j-pole ever built7.7K views 1 year ago. Basic Dipole Antenna Build, Demo, and Cost || 2m / 70cm. 7,712 views. 110. My first dipole antenna with cost breakdown. It comes out to …Make your own 2m band dipole antenna that's easy to make and doesn't cost much. It works so well that you don't need anything else!I am updating my blog week...In this video, members of the Stamford Amateur Radio Association W1EE, show us how to build a ZS6BKW antenna capable of covering the 80 to 6 meter amateur radio bands. ... 2m/70cm Ground Plane Antenna; The NE0U 160m EZ-L Antenna at WX0V; Tri-Band Fan Vertical for 40-80-160m; Ham Radio EME with a portable small dish; Rotating Tower at Jim Heath ...The basic "J" is reported to have >3dB of gain over a ¼ λ ground plane antenna and 6dB over an isotropic (theoretical) antenna. The "J" can be made from almost any material: copper pipe, steel whips, TV twin-lead, ladder-line or metal rods. Technically, the "J" antenna is an end-fed ½ λ antenna that uses a ¼ λ matching stub. Old-timersDualband Antenna's. 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. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements 2m VHF YagiI'm confident you will find this portable "J" to far exceed any other antenna, in the same setup, to more than tripling your 2m & 70cm (440MHz) performance! Here is a step-by-step to make a portable (or base) 3/4 inch copper-pipe "J" that breaks down into four (~24" long) pieces for easy transporting. This design uses a Bungie-cord to keep all ...Dualband Antenna's. 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. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements 2m VHF YagiFig. 1: (Left) AN-SOF model of dual-band vertical dipole with segmentation density. (Right top) Radiation pattern at 145 MHz (2m band). (Right bottom) Radiation pattern at 433 MHz (70cm band). Model files courtesy of Keith Rawlings (G4MIU). As articulated in Keith's article, this antenna emerges as an optimal choice when confronted with ...This DIPLEXER separates 2m from 70cm on the same coax cable. It allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band, when connected on the side of the antennas. Or use 2 equipments (one VHF and one UHF) when used on the side of the transceivers. The following data have ...Now its time to add the additional elements to the top and bottom of the collinear array. First add a ¼ wave element to the top of the antenna as shown in Figure 3. Use #16 solid wire or similar and solder it to the center conductor only. The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4.This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. There are usually four radials, three being a minimum, but you could use up to six. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great ...permits the antenna to achieve high performance, high power rat-ing low vswr, and broader band coverage on both 2m and 70cm bands. 2. Direct element joint structure with two interconnected FRP outer-shells. Enables the antenna to maintain the same strength as one with one piece structure. The ring gasket makes the antenna water-proof, and ...This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. There are usually four radials, three being a minimum, but you could use up to six. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great ...Now its time to add the additional elements to the top and bottom of the collinear array. First add a ¼ wave element to the top of the antenna as shown in Figure 3. Use #16 solid wire or similar and solder it to the center conductor only. The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4.An RF choke can save the day for field radio operations where you do not necessarily control all aspects of your antenna system and common-mode currents can wreck havoc on electronics, and even your fingers! Use an FT-114-31 with six turns of RG-174 or RG-316. You can also use eight turns with an FT-140-43. For more power handling you can use ...Build a dual band stub j-pole antenna for amateur radio 2m and 70cm. This was a pre-corded instructional video that we made for our Amateur Radio Club progra...W7LPN 2m/440 vertical dipole. The project below is my own design for a dualband vertical dipole for 2 meters and 440. It requires a balun and works very well. I like to tinker, so when I finish one project, I go on to another, even if it works well. There are several methods of constructing a vertical dualband dipole and a simple method is ...Check this one out if you're in the market for a 2/70 mobile antenna - does this work for your needs - let's find out! Get Yours: 👉 Radioddity Direct: https...I show you how to quickly build a DK7ZB yagi with 4 elements on 2m and 5 elements on 70cm with minimal tools.Plans are available from https://www.qsl.net/dk7zb/A 2M/70Cm antenna should cover the popular 2 Meter VHF and 70CM UHF bands. Make sure to double check the specifications to ensure you're getting the right antenna for your needs. ... Ham Radio: 2M/70Cm Skylab Build. Home-Brew 2M Antenna 143 - 148 Mhz. Final Thoughts On Selecting The Best 2M/70Cm Base Antenna. When selecting a 2m/70cm base ...An RF choke can save the day for field radio operations where you do not necessarily control all aspects of your antenna system and common-mode currents can wreck havoc on electronics, and even your fingers! Use an FT-114-31 with six turns of RG-174 or RG-316. You can also use eight turns with an FT-140-43. For more power …Two Connector (11) 2m 70cm Dual-band antennas. Common connector for both bands or with separate connectors for 2m and 70cm. Excellent gain on both bands and wideband operation.70cm Yagis are easy and compact to build using PVC pipes and welding rods. 2m Yagis can be a bit nasty as the reflector is a bit longer than the standard rods available in the market. I would build. The shorter length of the elements on a 70 cm yagi make it a lot easier than lower frequencies.You can actually make a good 2m/70cm antenna that way by using a 2 m dipole and a close spaced 70 cm 1/2 wave element, or two 70 cm 1/2 wave elements one on each side of the 2 m dipole. The radiation pattern on 70 cm will be similar to 3 1/2 wave collinear array and will have around 3 dBd gain.Diy 2m/70cm vertical dipole antenna . ANTENNA I have a big tree in my yard, a 5W dual band HT, and an old 45W mobile 2m unit(ft-212rh) that i think still works, but not 100% sure. I don't want to do a permanent antenna install yet, mostly cause I want to plan out a coax entry box.May 30, 2021. A coaxial Collinear antenna for 2m and 70cm mostly made from junk bits and pieces for less than £1. If you can't see the video, please insert this title URL into your …The antenna is dual banded to operate on 70cm using the same sleeve technique as used on the dual-band basic Flower Pot. This results in the antenna operating with four half-waves in phase on 70cm and provides a theoretical antenna gain of 6dBd on 70. Dimensions shown are for a 1st build prototype from a concept drawing and have yet to …This antenna is perfect for those hams living in the primary coverage area of the repeater for 2 meter use. This antenna is nothing more than the old standby "Droopy Groundplane" and can be used on any band where it's physical size does not pose a problem. Remember that the vertical radiator is 1/4 wavelength long at your operating frequency.I need something I can make at home. I have already made a really good 2m omidirectional antenna where I can hear hand from around 100-150k from me. I just need either a diy Yagi design or some telescopic design. Or another I'd anyone else recommends something else.Not so long ago I built my version of The Home-Brew SKYLAB Starduster for 26 - 30MHz, Super simple to build with just 10 metres of wire and a length of coax....Figure 3: 2m dipole or J-pole (free-space) vertical radiation . pattern (black) and the same antenna on 70cm (red). Fortunately, there is an easy solution. Install 70cm stubs on the 2m antenna to create a good UHF radiation pattern. Many commercial HF antennas use this technique to achieve good patterns on their multi-band antennas.2M Quarter Wave Ground Plane Antenna - Ham Radio - TheSmokinApeIn this video we build a DIY 2 Meter Quarter Wave Ground Plane Antenna. Please leave any quest...An Easy Dual-Band VHF/UHF Antenna. February 1995 QST Volume 79, Number 2. way is to obtain the angle of declination from a topographic map. Often referred to as the variation angle in air and sea navigation, this angle is simply the difference between true and magnetic North at a specified location. By knowing this.Chapter 18. Fig 25—Simple ground-plane antenna for the 144, 222 and 440-MHz bands. The vertical element and radials are 3/32 or 1/16-inch brass welding rod. Although 3/32-inch rod is preferred for the 144-MHz antenna, #10 or #12 copper wire can also be used. Fig 26—A 440-MHz ground-plane constructed using only an SO-239 connector, #4-40 ...An antenna for frequency F will also be resonant near F*3, so you may not even need 70cm elements. The different length conductors show different impedances at different frequencies; at a given source voltage you can drive the most current into a conductor when the impedance (AC resistance) is low. The lowest impedance is offered by 1/4 wavNov 28, 2018 · J-Pole antennas for the 2m and 70 cm (VHF/UHF) Amateur Radio bands come in many sizes, ranging from commercial models based on public service designs to homebrewed configurations using coaxial cable, 450 ohm ladder line, or even TV twin lead. Supporting structures can be anything from PVC pipe to wood, including temporary lashups affixed to ...I'm confident you will find this portable "J" to far exceed any other antenna, in the same setup, to more than tripling your 2m & 70cm (440MHz) performance! Here is a step-by-step to make a portable (or base) 3/4 inch copper-pipe "J" that breaks down into four (~24" long) pieces for easy transporting. This design uses a Bungie-cord to keep all ...This Parts item by BarberTechnologies has 244 favorites from Etsy shoppers. Ships from Warren, OR. Listed on May 16, 2024.UAYESOK Dual Band Magnetic Mount Mobile Antenna 2m/70cm VHF UHF Heavy Duty Mag Base Antenna PL-259 Plug for Vehicel Truck SUV Mobile Radio Transceiver HT Scanner. 4.5 out of 5 stars. 11. $29.99 $ 29. 99. ... Protect & Build Your Brand; Become an Affiliate; Become a Delivery Driver;Four Element Yagi Antenna for Ham Radio 70cm Band; MFE-1 End Fed Antenna Tuner; HF Indoor Loop Antenna DIY-Simple & Easy to Build; 6-element Quagi Antenna. Tape measure Yagi Beam Antenna; Ham Radio-A 40 meter folded dipole antenna using w... Building an Air Choke or "Ugly Balun" Portable PVC Conduit Antenna Mast; 2 meter VHF Halo Antenna ...The more common coax collinear requires a PVC radome to give it rigidity and weather proofing, and assembly can be difficult. The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed.The Slim Jim antenna is a flexible antenna made from ladder line. 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. Designed normally for 70CM (UHF - 440Mhz) and 2M (VHF - 145Mhz), these cheap, easy to make ...Sep 8, 2021 · In this video I've kept the time down to under 5 mins and easy to follow along. In the video I show you my way of building a very inexpensive and easy to bui...The more common coax collinear requires a PVC radome to give it rigidity and weather proofing, and assembly can be difficult. The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed.Homebrew 70cm (430 MHz) antennas. 70cm is a good band for experimenting with antennas. Unless you need very high gain the antennas are small. This means that you can experiment without fear of …Another awesome yagi antenna from @antennasamplifiers! This time a dual band 2m/70cm yagi antenna which has only one feedpoint connector.https://antennas-amp...As far as the radiating elements they are. 2M=19.5” 70cm=6 5/8”. This is measured from the lowest point of the U to the tip. Where your coax splits and connects to the elements is where the antenna length will be. Leave about 1” gap so you can move them in and out to tune with swr meter. Awesome, thank you.Hiking with an Arrow-size yagi, even the split beam is cumbersome. But it is quite effective for hill-topping purposes. Your market would be anyone who hikes up hills with a VHF antenna (so mostly the SOTA crowd). In New England, this is less than 200 people. 2M is ideal, though having the option of 70cm would attract the satellite types.Here i present the measured SWR of the antenna. As you can see, the impedance of the antenna is very well matched to a 50 ohm system. Between 144 MHz and 146 MHz, antenna has an SWR less than 1.2 . For an SWR of 2, the antenna has a bandwidth from 138 MHz to 151 MHz which is a pretty good result. F4HWKThis time I found an old fence wire, a piece of wood, and decided to make a yagi antenna. I already made an antenna like this a few years ago. Very simple. T.... I got around to building a DBJ-2 Roll-up 2m/70cm J-Pole ANot so long ago I built my version of The Home-Bre This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. There are usually four radials, three being a minimum, but you could use up to six. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great ... #baofeng #pmr #radioprepersWitam!W filmie prezentuję spontaniczne Now its time to add the additional elements to the top and bottom of the collinear array. First add a ¼ wave element to the top of the antenna as shown in Figure 3. Use #16 solid wire or similar and solder it to the center conductor only. The length of the ¼ wave element is calculated as follows: 1/4 wavelength radiator = 300 / F / 4. Step 4: Measurements. The developed antenna has been measured ...
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