Sep 24, 2020 · This 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...DualBand 2M/440MHz mobile antenna. This is the most popular antenna in the Comet line for several reasons: Mid-size / mid-price range / open coil flexs to absorb brushes with tree branches / black color fades into the skyline - ground independent. Gain & Wavelength: 2M: 3.0dBi 1/2 wave. 70cm: 5.5dBi 5/8 wave x 2.HYS 2m 70cm Antenna Base Station 68.89inch Fibreglass Antenna with SL16 Connector for Mobile Ham Radio Transceiver Two Way Radio Retevis RT95 Ham Radio Transceiver, Dual Band Transceiver, Rotatable LCD Dual Display, 200 Channels, 5W/15W/25W, CTCSS/DCS, Mini Mobile Transceivers with DTMF MicrophoneThis is how my Diamond V-2000 is installed and the performance I have gotten out of this vertical antenna. The V2000 covers 6 meter, 2 meter and 70cm bandsBu...Some simple portable antennas for 10 & 6 metres. Super simple 2m & 70cm antennas for FM, SSB & digital modes. Build a hanging dipole for 2 metres. 4 element portable yagi for 2 metres. Importance of inspecting and maintaining antennas used in the salty air (video) 3. Pedestrian mobile and ultra-small antennasFor completeness this is not the only DIY tape measure Yagi on Instructables so also check out [FN64's] 2 m band "Radio Direction Finding Antenna for VHF" and [manuka's] 70 cm band "433 ...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 ...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....If you have an old satellite parabolic dish antenna, you may want to convert it for 2 meter and 70 cm use. James Sanders (AG6IF) shows you how to make the easy conversion in this video. James says this alteration yields a cheap, easy to operate, and "stealthy antenna" for deed-restricted housing. For the latest Amateur/Ham Radio news and ...This antenna is for the 2-meter Amateur radio bands and will easily handle 5 watts of the average handy talkie. Materials you will need: 1 Aluminum or Carbon Fiber Arrow shaft. 1 SMA connector. 3 feet of RG174U coaxial cable. 1 "tube" of .025 music wire (tube usually has 5, 3ft rods. You'll need 4 rods)To make it more durable, I decided this time, I would build the antenna from a piece of wood for the backbone, and with copper pipe for the elements as it is easy to cut. A trip to my local Bunnings, and I had left with: Porta 40 x 18mm 1.2m Pine DAR Clear Solid AU$7.58. Porta 12mm x 0.9m Clear Pine Dowel AU$2.45.A ground plane antenna for 2m or 70cm is one of the simplest antennas to build and get working, and it can work quite well for repeater or simplex operation. It is easy to build for other bands as well. I’ll show you several different construction methods that you can use, based on the materials you have available.An Improved Version. (See older version here) 3 element = 7 dBd Gain. 5 element = 9.4 dBd Gain. 10 element = 13 dBd gain. These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. Building instructions for the NEW WB3AYW Collinear Antenna. This is for Two Meters only 02/11/2014.Email list: http://eepurl.com/iGP0CkPlans including the STL files: https://www.patreon.com/HamRadioRookie/shop/fara-j-2m-70cm-antenna-88511Patreon Membership...Animals and Pets Anime Art Cars and Motor Vehicles Crafts and DIY Culture, Race, ... Doing some shopping for mobile 2m/70cm antennas. Are the following antennas the best performance for that height, or are there better? <18" Diamond NR72BNMO 13.8" 2.15dbi/2.15dbi 0dbd/0dbd#1. This must be one of the simplest yet most effective DIY 2m/70cm antennas yet. You can build this with stuff you have laying around. Local friend was …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 …Oct 13, 2012 · This set me back about 50 euro cents per 2 meter (which means about 0.65 USD for 6.6 feet). I needed 50 cm of pipe in this antenna (2 times 25 cm). Next to this I used 70cm of speaker wire I had laying around and a few tie raps to strap it all together. I checked the SWR with the build in SWR meter of my FT-817. It was all 1:1.1 so perfect!Thanks to Bill (WX4AR) for this concise, accurate, and simple way to build a "classic" double bazooka antenna. Bill takes you step-by-step through the entire design, building, and testing process. The addition of an antenna "tuner" will help you keep SWR as low as possible. A good, reliable 40 meter antenna made from materials you may already have.10000+ "70 cm antenna" printable 3D Models. Every Day new 3D Models from all over the World. ... Tags 2m or 70cm Ground Plane Antenna Bracket , , , , , Download: for sale Website: Cults. add to list ... Tags DIY Parts 2 70 Yagi antenna design , , , Download: free Website: Thingiverse. add to list Tags 2m 70 mobile ...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 …16 Dec 2023 ... DIY Dual Band Aerial. 70cm & 2m Ham Radio. Part 4. Final Test Results. · Comments.The antenna is constructed from M4 stainless steel threaded rods, as they are relatively inexpensive and common place at most DIY stores. Additionally, it is an easy material to work with and does not require any special tooling. The boom is constructed it from 10mm2 aluminium box section, again it’s cheap and stocked in most DIY stores.4 Nov 2021 ... The FBK2 / 70 is in its basic form a 2-meter half-wave antenna, and will behave like that, in the middle of the 2m band (145MHz). The half wave ...Dual-band 2M/70cm HT Antenna. Super flexible and lightweight, about 1/8″ diameter, made from similar material as unbreakable eyeglass frames. If your desire is to increase the range and signal strength of your HT, this is the standard upgrade antenna for any HT with a BNC connector. Gain & Wavelength: 2M: 2.15dBi 1/4 wave. 70cm: 3.5dBi 5/8 wave.A collection of 9 easy to build J Pole antenna projects for VHF UHF and also HF News. Top Amateur Radio Websites - Issue 2420. Top Amateur Radio Websites - Issue 2419 ... A J-Pole for 2-meters and 70-cm. KD6GLF. ... Build a 2 Meter 5/4 Wave Antenna. N1HFX. This antenna is unique in that it is enclosed entirely in 3/4" PVC .Dual Band Half-Wave Flower Pot Antenna. ... Dimensions shown are for the (basic) 2m half-wave Flower Pot. The modification involves placing a co-ax phasing sleeve around the outside of conduit, positioned as shown. ... Then check VSWR across the 70cm (430 - 450 MHz) band. Expected VSWR readings will be less than 1.2:1 at band edges and less ...It is estimated that the Slim Jim appears to have about 6dB gain over a 5/8 wave antenna due to the extreme low angle of radiation. (Most of the radiation is directed toward the horizion making the "gain" appear much greater than other vertical type antennas it has been compared to with A/B testing) Editor's note: There are many gain figures ...TWAYRDIO Yagi Ham Radio Antenna,Dual Band 2m 70cm VHF UHF Yagi,High Gain 8 Elements GMRS Vertical Base Antenna for Repeater System,HT Scanner,Satellite Work. dummy. SMA-24 SMA24 SMA 24 SMA/24 SMA(24) Original Comet Dual-Band 2M / 70cm HT Antenna SMA-Male. dummy.Business education is, let’s face it, finding it hard to keep up with a $3 trillion global tech startup economy that’s booming right now. High-growth companies are time-starved and...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. F4HWKOption 4: mount it along the truck bed rail all the way at the rear of the truck… old school CB style. Option 5: I've got Thule truck rails (similar to a ladder rack). Made of aluminum and the cross bar is about 4 inches wide. Surely there's a way to mount an antenna to the outside edge of the cross bar.23 Apr 2017 ... VHF UHF antenna basics - DIY antennas from surplus 800mhz antennas for 2m 70cm and dual band · Comments110.Use a pair of hose clamps, and secure them firmly. Step two is to mount the slightly shorter measuring tape, known as the director, across the PVC tee. Like the first connection, make sure the clamps are firmly attached, and center the tape on the tee. Step three is to prepare the coax. You have a 6′ SMA extension cable in the kit.Aug 29, 2017 · Built a Yagi 2m 70cm Tape Measure Antenna for amateur radio satellites but this video shows me having a QSO of a repeater about 20-30 miles away. Inspiration...For your situation, a Diamond X50A is a good choice and a simple duplexer from Diamond or Comet should do the job. Another option is to use a tri-band vertical so you can work 23 cm, as well. These may be too tall for your attic. Another 2m / 70 cm option is the Diamond X-30A, about one foot shorter than the X-50A. Some folks like the dualband ...I built a couple of these out of 12 ga. wire with two 70 cm resonators and one out of 1" tape measure with one resonator. It appeared to me that adjusting the spacing can get the imedance on 70 cm real close to 50 ohms. I have no way to measure the radiation pattern.A collection of 9 easy to build J Pole antenna projects for VHF UHF and also HF News. Top Amateur Radio Websites - Issue 2420. Top Amateur Radio Websites - Issue 2419 ... A J-Pole for 2-meters and 70-cm. KD6GLF. ... Build a 2 Meter 5/4 Wave Antenna. N1HFX. This antenna is unique in that it is enclosed entirely in 3/4" PVC .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.So I built a simple flower pot antenna from PVC pipe and coax. My First Antenna - A Dual Band (2m / 70cm) Flower Pot Antenna. I've bought a few whips for my HTs and thought it was about time I made an antenna of my own. Obviously, the place to start was a dual band UHF / VHF antenna. Design. I picked the flower pot antenna …Paul VK4APN has sent me some plans for for a 2m and 70cm LPA that I intend to build for portable use, but does anybody have any plans for one that covers 50- ...For your situation, a Diamond X50A is a good choice and a simple duplexer from Diamond or Comet should do the job. Another option is to use a tri-band vertical so you can work 23 cm, as well. These may be too tall for your attic. Another 2m / 70 cm option is the Diamond X-30A, about one foot shorter than the X-50A. Some folks like the dualband ...Slim Jim Antenna Project – VU2RMU. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. Slim Jim 2M Antenna – SV5BYR. L.B. Cebik web site – requires registration (free) Commercial 2M 70cm Slim Jim – N9TAX. 2M Slim Jim antenna using Aluminum Tubing. Some Notes on the Slim Jim Antenna – M0UXB. Slim Jim Build. Handmade Slim Jim Antenna by .n9taxThe 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.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.Duoband Yagi 2m/70cm with 4 Elements on 2 m. and 5 Elements on 70 cm and one Feedpoint. Version 1: Ultralight with 3,2-mm-Elements. Version 2: With 8- and 10-mm-Elements (see down), built by SQ9VPA. The 4-El.-Ultralight-Yagi for 2m can be used on 70cm with an SWR of 1,5 without any changes. The pattern and the currents of the Yagi are shown down.Mhz so it can generally covers the whole VHF amateur band. -Connect a SWR meter to the antenna and to the radio, making sure you attached it to the right connector posts. -Take a SWR reading, and if it is beyond 1.5, cut the 19.5" VHF element rod 1/8" at a time until the readings is in between 1-1.5. -Theoretically , a reading of 1 is the best ...In this exceptionally well-made video tutorial, Julien (OH8STN) takes us step-by-step through the design, construction, testing, and use of a one or three element quad antenna for UHF (70cm). The construction is straightforward and should not present any problems as you complete this useful antenna for your shack or portable use. For …Erfahrungen zeigten, dass meine Vorhersagen zum 2m-Band mit ihren Messungen übereinstimmten. Wenn die Antenne jedoch relativ hoch und frei von Hindernissen montiert wurde, stimmten die beobachteten Feldstärken auf 70cm nicht mit meiner Vorhersage eines Gewinns von etwa 5 dBi überein. Normalerweise waren die Signale alle deutlich schwächer.Dec 18, 2008 · A local friend that I told about this antenna project built it today. Took him 45 minutes and cost him $12. Instead of using stainless steel for the elements, he used brass. He also tightened up the gap between the 2m/70cm sections seen in these pictures; the pics were taken before he corrected them. Nice job, Wayne! Here are the pics:For use on 2nd story balcony with an HT radio (DMR + Analog). Seeking something capable of at least a 12 mile radius and in a suburban area. Other buildings in the complex are two stories as well. Three antennas on my short list are the Ed Fong 5ft antenna, a J-pole, and a 17in Chinese dual bander from eBay.One of the easiest and quickest antennas to build is the Vertical Bazooka, which is made entirely from RG-8U coaxial cable. ... practical considerations of mounting and support tend to limit it to the span from 10meters (28mhz) to 70cm (440mhz). ... The SWR is under 1.5 across the entire 2 meter band. It measured 1.3 at each end and 1.1 in the ...Mounted to the horizontal cross piece with 2 U clamps, long legged muffler type clamps. Top of antenna is about one inch below the ridge beam. Bottom of antenna is approx 25 feet above ground level. Using 400 flex type cable (ABR brand from HRO). Just try to keep it away from any metal, vents wiring etc.While a conversation piece, helix antennas do not have more gain than yagis or quads that you can build or buy in the ham radio marketplace. Share. Improve this answer. Follow edited Nov 4, 2013 at 8:10. answered Nov 4 ... You can turn a small dish antenna into a 2m, 1 1/4m, and 70cm antenna by cutting 3 slots into it. The dish really has room ...Connect the coax cable to the 2 parts of the driven element near where they enter the wooden beam. Wrap the cable's inner wire around the short leg of the J, and the twisted outer wires around the long leg. Solder the wires in place. Secure the coax cable. Secure the coax cable with a couple of zip ties. Your antenna is done!309,00 €. Add to basket. SKU: 1370. Reviews (0) 2m-70cm The Best Dual Band Antenna 2m70DX37-2Conn with two separate connectors. Two separate antennas on the same boom. Behaves as two extreme gain monoband antennas. 1500W on 2 meters and 850W on 70cm. 12 elements on 144 MHz and 25 elements on 432 MHz. 2 meter and 70 cm Longest Dual Band Yagi ...The antenna arrived at is shown below, and looks very similar to a standard 2m quarter wave ground plane except radial and radiator lengths and radial angle. However, the dimensions are sub optimal for min SWR for 145MHz but enable a 3/2 wavelength antenna on 70cm as we will see.In this quick video, Jim (AG6IT) shows us how to change a piece of unwanted gear into something useful. Here are some comments from Jim: a 40 inch slot cut in a parabolic dish, fed with a so239 jumper about 4.5 inches from the end of a slot, yields a stealthy antenna which can be used for 2m and 70cm. Vertically polarized and blends in nicely.The antenna length formulas used in our dipole length calculator are as follows: L = 468 / f. l = L / 2. where: L — the length of the total dipole antenna in feet (ft); l — the length of the arm of the dipole antenna in feet (ft); and. f — the desired frequency. We also used the simple wavelength formula: Wavelength = c / f.the 2-meter band. Shortening the stub to move the maximum VSWR point higher in frequency is easy. Should you over- shoot, it is simple to start over again with a new piece of wire. Once you are satisfied with the results, the P L-259 can be cemented to the insulator. That's all there is to it. See you on 2 fm! Notes "5/8-Wavelength Vertical ...My first dipole antenna with cost breakdown. It comes out to about $40 if you have to buy everything, $12 if you already have some electronic / hobby-type ma...13 Oct 2012 ... I made another antenna; a 70cm Quad antenna, and it works like a charm! The “bad” thing about quads is that they are full wavelength ...In this video I go through the steps to build a very simple, inexpensive multi band dipole antenna for the 40 and 20 meter amateur radio bands which can be used either at your home or in the field for off-grid emergency communications. Additionally, this DIY wire dipole antenna will also work on the 15, 12, 10 and 6 meter bands if your radio ...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....You can purchase this antenna from Moonraker.eu via the following link:https://www.moonraker.eu/hlp-2-144mhz-2m-halo-loop-folded-dipole-antenna-3596As you ca...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 builtHere 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. F4HWKHow To Build A DIY 2M Roll-Up Slim Jim Antenna (Including How To Crimp A PL-259 UHF Connector Onto RG8X Coaxial Cable): Step-By-Step Instructions. March 1, 2022 by …One could always build a multi-band antenna with LC "band traps" which is commonly used in the 80-10 meter bands. Even at HF, experience builders of LC traps ... (2 meter, 220 MHz and 70cm meter) antenna by J.L. Harris [3]. It was a stacked Tri-band J-pole antenna as shown in Figure 4. It is basically 3 parallel J-poles where the coax forHow to build a 40 meter Dipole Antenna (no balun) Ham Radio Survival Kit; Dipole Coax Antenna (2m/70cm) Portable Ham Radio Antenna; Ham Radio: Simple vertical antenna for portable dx; 5 Tips for Ham Radio Antenna Building; Stay away from cheap coax; Simple HF Mobile Antenna Installation; Can an antenna work while laying on the ground?The antenna is constructed from M4 stainless steel threaded rods, as they are relatively inexpensive and common place at most DIY stores. Additionally, it is an easy material to work with and does not require any special tooling. The boom is constructed it from 10mm2 aluminium box section, again it’s cheap and stocked in most DIY stores.Depending on the 2 meter and 70cm frequencies you choose for tuning your antenna, you might have to compromise a little. I got lucky, because I was using 147.060 MHz and 442.100 MHz, which just happened to both yield a length of 19.08 inches for the longer of the two 3/8″ rod elements.Don't worry about it. In a general purpose FM antenna, little bit of feedline radiation can be even useful, makes it work better against horizontal antennas. A sleeve balun could be an option. Thick tube (1inch or more) over the coax, open at feedpoint, shorted to coax shield at far end, 1/4 wavelengths long at 2m, 3/4 waves at 70cm.The yellow trace is the VSWR reading from the antenna analyzer. One pink asterisk is at 2M, and two pink asterisks is at 70cm ham bands. Zooming in on 2M shows a slightly better SWR than the full spectrum, at between 1.5 and 3 across the band. The VSWR of 70cm was below 2 across nearly the entire band. STEPS #22 to #25: COMPLETE THE ANTENNA. 22. In this video I explain how to make your own antenna for your handheld ham radio for almost no cost at
"A look at the MFJ-916B duplexer with SO-239 connectors (also available with N connectors and also available with an outdoor version). You can use this to connect a 2m radio and a 70cm radio to share a single, dual band antenna, or use it with a dual-band radio to connect to a separate 2m antenna and 70cm antenna. Interesting device!In this video I show you 4 different no-solder antennas that I build in minutes from scraps of 75 ohm coax cable. They can be constructed with minimal suppli...160 Meter $39 Inverted L Antenna with home made co... Ham Radio lowest cost high performance HF antenna. Ham Radio Survival Kit; Near Vertical Incident Skywave Propagation NVIS An... 2 meter antenna tuner project; DIY 2M Ground Plane Antenna; Survival Radio Antennas 1: The coax only antenna; Ham Radio-The Light Bulb Antenna; Effective Indoor ...DIY 2m 70cm Rollable J Pole Antenna; Yet Another 10 Meter Moxon; A Thirty-Foot Mast using Home Depot parts. February 28. January 31. 2023 360. December 30. November 30. October 28. September 30. August 31. July 31. June 30. May 31. April 30. March 31. February 27. January 31. 2022 360. December 32. November 31. October 30. …About Mobile Dual-Band 2m/440 -- Roger K6XQ advises-Can I build a 2m/440mhz 5/8 mobile antenna? A 1/4 wave on 144 MHz is 3/4 wave on 440. The SWR is usually acceptable on the 3rd harmonic, although that is partly due to the increased feeder losses on 440.52-1BP. Dipole for 6m with split boom. With holes and optional elements for 6m, 2m, 1.25m and 70cm. This allows one boom to be carried for all those bands. This antenna was designed for SOTA. 10W. Micro Duplexer for the 146/437-10 Satellite Antenna (10 Watts) (fits inside the handle) 437X14.Apr 6, 2021 · Here are some of Mike's comments. A really quick antenna for 2 metres and 70 centimetres, made from just 2 metal coat hangers and a small length of strip connector just add the fun. Next time coax traps on the DX commander I do hope you enjoy it and subscribe for more.. Many thanks Mike - M0MSN To get notified of the next upload .click that ...An Improved Version. (See older version here) 3 element = 7 dBd Gain. 5 element = 9.4 dBd Gain. 10 element = 13 dBd gain. These Collinear antennas are " 4 " Megs wide and "must be supported" at the top by a yard arm or tree limb. Building instructions for the NEW WB3AYW Collinear Antenna. This is for Two Meters only 02/11/2014.For use on 2nd story balcony with an HT radio (DMR + Analog). Seeking something capable of at least a 12 mile radius and in a suburban area. Other buildings in the complex are two stories as well. Three antennas on my short list are the Ed Fong 5ft antenna, a J-pole, and a 17in Chinese dual bander from eBay.Everybody is aware of the purpose of a TV antenna. But very few people know that creating an antenna at home is a fairly simple process if you have some basic skills. This is also ...This is the insides of a common dual band antenna 2m/70cm, made by diamond or nagoya. its generally labelled as: 1/2 wave radialless (144MHz), 2 x 5/8 wave radialless (430MHz) Its meant to be ground independant. Im trying to find the design name for the tuning/matching circuit at the bottom and how it works.I used 1″ thin-wall PVC pipe, aluminum tape, and RG-8X coax. The goal here is to put up a cheap, easy, and quick 2-meter antenna that is simple and unobtrusive, but works quite well. If you have the materials handy, you can build and install this antenna in a couple hours. This dipole was constructed as follows: Cut 6 or 7 feet of 1″ thin ...Jul 19, 2014. #8. The best antenna is the one you just made a contact with. Seriously, if you are not on a budget, Diamond and Comet make excellent 2m/440 antennas in several gain configurations. You could build your own. Arrow antenna makes a 2m/440 j-pole, which at $49.95 is a bargain and an excellent antenna.Easy to build antenna for 2 meters. Follow along as i show you how to build a Quarter wave ground plane for 2 meters. From start to finish i walk you thrual...In this exceptionally well-made video tutorial, Julien (OH8STN) takes us step-by-step through the design, construction, testing, and use of a one or three element quad antenna for UHF (70cm). The construction is straightforward and should not present any problems as you complete this useful antenna for your shack or portable use. For the latest ...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....I got around to building a DBJ-2 Roll-up 2m/70cm J-Pole Antenna yesterday. It's wasn't hard at all. The most difficult part was cutting the sheath of RG58 and RG316 off without cutting the ground braid. The trick was in a video - you bend the coax and just glide a blade over the sheath where it's stretch and it pops open - kind of like ...Cushcraft 2M/70cm Wideband Yagi Beam Antennas A27010S Antenna, Yagi Beam, 2 Meter/70 cm Wideband, 10 Element, 6.10 ft. Boom Length, 350 W Power Rating, Each Part Number: CSH-A27010SA 1m length of 19mm x 9mm cross-section wood. 12 aluminium welding rods, approx. 3.2mm diameter and 50cm long. A A 90-degree corner brace. Wood screws and two 6 x 50mm bolts with washers and nuts. Cut a 40cm piece from the 21mm x 21mm cross-section wood. Drill five 3.5mm holes in this piece, 8cm apart (from centre to centre), starting 1cm from ...Homemade 2M/440 J-Pole Antenna. A 2m 70cm Dual Band J-Pole antenna for 35 USD. An excellent performing J-Pole type antenna, constructed from readily available materials. Category : Antennas/J-Pole.For your situation, a Diamond X50A is a good choice and a simple duplexer from Diamond or Comet should do the job. Another option is to use a tri-band vertical so you can work 23 cm, as well. These may be too tall for your attic. Another 2m / 70 cm option is the Diamond X-30A, about one foot shorter than the X-50A. Some folks like the dualband ...The antenna has an SWR of roughly 1.8:1 at resonance (see Figure 2). However, the SWR stays close to 2:1 across the entire 2-meter band. Modern 2-meter rigs can handle this easily, and the losses are quite small at an SWR of 2:1. In the true spirit of homebrew simplicity, matching is not called for,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...While it may appear these antennas won't work, build one and try it; my first antenna (also my first homebrew project) was for 70cm, the first station I heard was a repeater 50-60 miles away.--Joshua Davis, KD5LSX. You will need (dependent on the band you wish to build your antenna for):For approx £2.50 you can build a wire dipole for each. It will work, especially if you want to do horizontal polarization ( for low power/SSB/digital) UHV/VHF work. I'm a new operator and I've already got a self-made ground plane for 2m band but I wonder if different designs could be more efficient. Jpole or a….One of the great things about digital television is also one of the not-so-great things. When you get the signal, it's crystal clear. When you've a weak connection, you're out of l...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...In the video I incorrectly state 440cm, this is intended to mean 440 band or 70cm!In this video we will make a yagi for 2 meter and 70 cm ham bandsLink to In...DIY 2m 70cm Rollable J Pole Antenna; Yet Another 10 Meter Moxon; A Thirty-Foot Mast using Home Depot parts. February 28. January 31. 2023 360. December 30. November 30. October 28. September 30. August 31. July 31. June 30. May 31. April 30. March 31. February 27. January 31. 2022 360. December 32. November 31. October 30. September 27. August ...On most of the J Pole designs out there, a choke should be used as close to the feedpoint of the antenna as possible to help prevent rf on the feedline and creating difficulty with SWR readings. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. You should get good results with the choke within 3 or 4 inches of the feedpoint on ...Here are some comments from "electronics unmessed": This video is about building a loop antenna for the 70 centimeters amateur radio band. What I particularly like about this antenna is that it implements a bandpass and a powerful antenna at the same time. The principle of this antenna is actually very simple: A ring with the circumference …Age : 71. Subject: Homebrew 2m/70cm Dipole Antenna Sun Mar 19, 2023 9:35 pm. Following on from my PMR446 Antenna I decided to try my hand at constructing a 2m/70cm Vertical Dipole Antenna. 3mm stainless steel rod was used for the antenna arms and various other bits and pieces I had laying around in my shed were used to complete …My SWR reading was 1.2 on ch 1,1.1 on ch 20, and 1.2 on ch 40. But when I raised it up to full height the readings went up to 1.4 on ch 1, 1.3 on ch 20 and 1.4 on ch 40. I believe that its because is mounted too close close to my open stub J-pole antenna for 2m/70cm. But they are readings I can live with.But keep in mind that 2M and 70cm share a similar relationship as 40M and 15M. A dipole cut for 2M will already have resonance on 70cm near 50 ohms. Making a fan dipole with these two bands may being the 70cm impedance down around 25-30 ohms. As a vertical, the 70cm radiation pattern on a 2M antenna is not ideal. It's high angle.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 YagiIndustrial robots are expensive. But, then, so are construction mistakes. Being off by an inch here or there adds up quickly, and too often crews need to correct costly errors. The...Building for 70 cm Cutting elements for 432 MHz Yagis ... On a common build Yagi-Uda antenna all the parasitic elements are 'in line'. They are on same height. ... A method to cut all 8 elements needed for 4 bay of 2m xpol Yagis in one go! Method shown and introduced by Norbert, OE3NFC. Photos on courtesy of OE3NFC - tnx! ...Here is the list of parts needed to build a 2 meter vertical antenna: An inexpensive and readily available way to get 14 ga. copper wire is to go to the hardware store and buy some Romex wire. The first thing to do is to strip the copper wire out of the Romex wire sheath, then you will see a bare wire, a black and white wire. then strip off the ...Cubical Quad Antennas. If you want to get a real signal strength boost for your 2-meter and 70-cm activities, please consider a cubical quad antenna. In this video, Dave Tadlock (KG0ZZ) discusses the theory behind cubical quad antennas and shows us how to design, assemble, test, and use a simple 2-meter cubical quad. DIY 2M Ground Plane Antenna. October 18, 2021. DIY 2M Ground Plane Antenna - Ham R