We built a 2m dipole antenna out of a broom handle, pvc and some other small pieces that we had laying around the house. Ham radio is such a wonderful hobby ...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.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 as ...This is post 2241 in a continuing series of simple ham radio antennas. Thanks to Paul Foulkie for this great antenna idea. This portable 2m/70cm antenna is suitable for both portable and home operation. You should be able to find most of the materials at the nearest building supply center or neighborhood hardware store.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/0dbdRated 5.00 out of 5 based on 13 customer ratings. ( 13 customer reviews) $ 65.00. The Signal Staff is a dual band 2 meter / 70 cm Open-Stub J-pole from S&K Antenna Systems! This is a new antenna for us here at Signal Stuff made by S&K Antenna Systems who are friends of ours and have assisted in many aspects of Signal Stick manufacturing!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 ...Re: Homebrew 2m, 70cm mobile antenna. by knight » 11 Feb 2010, 17:17. First the photo is a heldhold mobile radio and the antenna is for a mobile radio. I am trying to build a antenna for the roof of a car which I did say a mobile car antenna for the roof of a car not heldhold. knight.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.May 30, 2021 · This is post 2638 in a continuing series of simple ham radio antennas. Thanks to Clint of "Oxford Shortwave Log" for this coaxial collinear antenna system for 2m and 70cm. Depending on the materials in your "junk box", you could build this VHF/UHF antenna for almost no cost. Here are some comments from Clint:=====More information on my website at http://www.fuzzthepiguy.tech=====Here are the measurem...I've always wanted to have a go at working the satellites but never wanted to pay out on a dual band antenna. I already have a cheap uv5r radio that's I've s...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 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 …For 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 ...2 meter 70 CM or 440 Mhz antenna building parts I found were cheap and the antenna did pretty good! I love the SWR. The SWR was Low. The 2 meter antenna...Make that a very tight fit at the bend. This is where the coax cable will be soldered. Make sure both antenna elements are exactly the same. If need be, cut to make them equal. I had a PVC ½ to 1 1/4 adapter for the base to mount to my PVC mast. My vertical section is 24 inches ( 61 cm).It is a little different for the higher band, with the resistive component of the longer element being a bit higher and its reactance a bit lower, but still, most of the current will flow to the 70cm element. 1. Award. Hi there, I made a …To make the Eggbeater antenna project even easier and more cost efficient, I decided to build the Eggbeaters myself, but to design the 70cm Eggbeater dedicated for the downlink and the 2m variant for the uplink. This post is about building the 70cm antenna. These two excellent documentations by ON6WG and F5VIF served as a basis for the ...It is a little different for the higher band, with the resistive component of the longer element being a bit higher and its reactance a bit lower, but still, most of the current will flow to the 70cm element. 1. Award. Hi there, I made a …Six Meter Folded Dipole Antenna; 2 meter/70 cm telescopic dipole, homebrewed; Simple to make 2m/70cm antenna project for portabl... Homemade Full Wave Dual Band Antenna for 2 meter a... MFJ Duplexer-two radios one antenna or vice versa; Idiot's Guide to Wire Antennas; My low cost 10 meter DIY; Ground Radials for Vertical AntennasI 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 ...I was surprised to discover the 70cm band workable, while this makes sense since 70cm is the 3rd harmonic of the 2m band, the simulation did not hold promise. But sometimes you get lucky if you try. You too can build this 3-element Yagi antenna without fancy test equipment by using accurate dimensional measurements and good construction technique.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 YagiHow to build a 2 meter yagi antenna with a gamma match. Simple and easy to make using parts from an old TV antenna. You'll love this small high gain 4 element yagi beam antenna. ... 6m/2m/70cm Yagi Antenna Built from Old TV Antenna by KGØZZ This turned out to be a great little antenna. It works the 6 meter, 2 meter and 70 centimeter bands. You ...This is also a nice ham project, een small antenna for 2m and 70cm, after using it you can roll-up the antenna, very nice on holidays... I invented a similar system, but completely made of RG58 coax. ... Build a 2 meter 5/4 Wave Antenna by N1HFX This month I decided to build a 2 meter 5/4 wave antenna. This antenna is unique in that it is ...Nov 19, 2018 · Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). The antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1.7:1 at band edge.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. [e.g. 145MHz x 3 = 435MHz - that's 2M to 70cm or VHF to UHF] The modification involves placing a coax phasing sleeve of aluminium foil around the outside ...It's a multi-band 80-6 meter wire dipole. ZS6BKW started with the G5RV and then conducted extensive computer modeling to increase the gain, flatten the SWR a bit, and smooth out the lobes. It's also about 10 feet shorter than an equivalent G5RV. The antenna must be fed with 39 feet of 450 ohm ladder line and also must have at least 70 feet of ...3 Dec 2003 ... Also, for very little more money, if one doesn't like the possible directivity of this antenna, one could simply build two of them, one for 2m ...Construyo, a Berlin-based startup that offers a “holistic” project management service that connects the architecture, engineering and construction (AEC) industry, has raised €2 mil...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.Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 13 Steps to Success 1. Drill the bracket. 2. Measure and Saw the all-thread. 3. Mount antenna mount on …The articles present designs and construction techniques for inexpensive and easy to build antennas that will make perfect first projects. All articles are in Adobe PDF format. CheapYagi for 70cm - This article is intended to enable non-satellite hams to painlessly acquire the 440 MHz downlink antenna needed to actually hear and work a satellite.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 ...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 ...My first dipole antenna with cost breakdown. It comes out to about $40 if you have to buy everything, $12 if you already have some electronic / hobby-type ma...11 Mar 2017 ... Final part of version two of my dual band vertical dipole antenna. A third version, for permanent mounting, will be built soon in order to ...You can actually make a good 2m/70cm antenna that way by using a 2 m dipole and a close spaced 70 cm 1/2 wave element, or two 70 cm 1/2 wave elements one on each side of the 2 m dipole. The radiation pattern on 70 cm will be similar to 3 1/2 wave collinear array and will have around 3 dBd gain.Easy to build ham radio dual band 2 meter and 70 centimeter ground plane antenna.The large square with 28 cm edge length covers the 2m band in the frequency range of 140 - 150 MHz, the smaller one allows operation on 70cm from 400 - 470 MHz. The signal direction corresponds to the open side of the loop element. The 50 ohm supply with up to 800 watts is provided by a PL/SO239 connector.Antenna, Yagi Beam, 2 Meter/70 cm Wideband, 10 Element, 6.10 ft. Boom Length, 350 W Power Rating, Each. Part Number: CSH-A27010S. 3.8 out of 5 stars. Estimated Ship Date: Tuesday 5/28/2024. Free Shipping; Documentation...Loading Estimated Ship Date: Tuesday 5/28/2024. Free Shipping;$\begingroup$ I have been exploring building a parabolic 2m/70cm. There is a very interesting antenna design built specifically for stealth(HOA). My use case is EMCOMM/ARES/RACES. Its referred to as a slot antenna. My research just started, so I will share a link to get you started.The new 2M/70cm has higher gain and is mounted 10 feet higher than the previous antenna. The 6M HO Loop is very narrow-band, but the SWR is nearly perfect at 50.3 MHz, so it will be great for digital and CW work. I did tune to 50.313 MHz and could hear and decode lots of FT8 from stations participating in the ARRL June VHF Contest.Thanks to radio amateur Dave Tadlock (KG0ZZ) for this simple, effective VHF/UHF (2m/70cm) ground plane antenna. Most of the materials can be found at the nearest hardware store or building supply outlet. The antenna is perfect for local traffic and ragchew nets, as well as portable and emergency use.HAM RADIO: Easy SlimJim / J-Pole Dual band Antenna Build for 2m/70cm, Thanks to a book I purchased many moons ago, I have found the perfect way to pass a ra...Just usage rosin-core solder. Do not make use of "plumbing solder", acid-core solder, or pipes paste. The acid in these materials breaks down the solder joint when electrical present go through it. Here is a photo of a 70 centimeters j-pole antenna that I use: This has been up for concerning 7 years. You can see how the pipe transforms black ...Radio amateurs have used almost anything metal to build antennas. In this video from Gil of the "Radiopreppers.com" network, we see how locally available copper tape can be used to create a "stealthy" 2 meter antenna. This antenna is good news for those of us living in deed-restricted housing (HOA/CC&Rs). Here are some general comments from Gil:I was surprised to discover the 70cm band workable, while this makes sense since 70cm is the 3rd harmonic of the 2m band, the simulation did not hold promise. But sometimes you get lucky if you try. You too can build this 3-element Yagi antenna without fancy test equipment by using accurate dimensional measurements and good construction technique.UAYESOK Heavy Duty Magnetic Mount Mobile Antenna Dual-Band 2m 70cm VHF/UHF Mag Base Antenna PL-259 Plug for Vehicel Truck SUV Mobile Radio Scanner Repeater System Visit the UAYESOK Store 4.4 4.4 out of 5 stars 115 ratings4. Use paste flux on all joints when fitting the pieces together. Use enough flux, since you will be cleaning the entire antenna with solvent after assembly. 5. Use a weight to hold the 19″, 57-1/2″, and 2″ pieces, and the Tee and the elbow, flat when they are sweat soldered together. 6.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.Indices Commodities Currencies Stocks2m-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 builtDIY 2m/70cm Antenna That is Better than What I Have? Right now I have a TWAYRDIO 20m/70cm Yagi that the manufacturer claims to be +9.5 dBi for VHF. I'm not sure how accurate that figure is, it seems a tad optimistic; but I'm happy with the antenna overall. I can hit all of the nearby repeaters near me, except one.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 …Radio amateurs have used almost anything metal to build antennas. In this video from Gil of the "Radiopreppers.com" network, we see how locally available copper tape can be used to create a "stealthy" 2 meter antenna. This antenna is good news for those of us living in deed-restricted housing (HOA/CC&Rs). Here are some general comments from Gil:2m/70cm is pretty easy... almost anything that works well on 2m will work fine on 70cm, and a lot of designs are balanced between the two. To get all three though, it gets a bit trickier. Easiest solution is to build/buy a discone. The biggest issue with moving your VHF+ antenna further away is that coax losses are pretty high on UHF.24 Apr 2020 ... 2.6K members. Join. Antenna Building Novice & Expert. 29K members. Join. FT-991A. 3.1K members. Join. Ham Radio Swap - Online Hamfest. 16K ...I tested my antenna on the local N4NRV input frequencies for our two repeaters. With a 50 foot length of RG8, and the antenna 20 feet in the air, SWR was a respectable 1.13:1 for the 147.780 MHz input frequency, and 1.01:1 for the 449.650 MHz input frequency. I was so pleased with my results that I purchased enough materials to construct ...Baofeng Antenna options! Post 2069. 2m/70cm Ground Plane Antenna. Post 2068. DIY Dual Band VHF UHF antenna from surplus. Post ... The 'L' Dipole Antenna for Ham Radio. Post 2066. ARRL opposes cuts in 3.3-3.5 GHz Amateur Radio All... 7 and 28 MHz HF pedestrian mobile with 6m wire. P... How to build a dipole antenna for Ham Radio. Post...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 ...The 3 element 2 meter (designed for 146mhz) quad in this project has a very small footprint (boom length) of about 32 1/4 inches and according to the computer guru's out there, it has about 9.45dBi gain with only three elements. 9.45 dBi equates to 9.45 - 2.15 = a whopping 7.3 dbd gain with over 20db front to back ratio and a 2:1 swr bandwidth ...Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 13 Steps to Success 1. Drill the bracket. 2. Measure and Saw the all-thread. 3. Mount antenna mount on bracket. 4. Mount bracket to conduit. 5. Install 18-inch all-thread. 6. Use SWR meter to adjust all-thread and position of bracket onSlim 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 Diamond X-50N 2m/70cm fixed station vertical antenna is a durable and reliable option for amateur radio enthusiasts. With a length of 1.7m, a radial length of approximately 19cm, and a weight of just 0.9kg, this antenna is lightweight and easy to install. It boasts a gain of 4.5dB on the 2m band (144MHz) and 7.2dB on the 70cm band (430MHz), …. While a conversation piece, helix antennas My SWR reading was 1.2 on ch 1,1.1 on ch 20, Larsen NMO2/70B Dual Band Coil and Factory Tuned Black Whip for 2m/70cm Amateur Radio Frequencies, BLACK with NMO VHF/UHF antenna, Connector: NMO, Height: 34.5 inches VHF: Center Loaded 1/2 λ (144-148 MHz) UHF: Collinear (440-450 MHz) Gain (2m/70cm): 2.4 / 4.0 dBi Max Power: 100W, Color: Black This antenna is compatibl This means I have 3 models of antenna avail Oct 31, 2015. #2. 2 meter antenna. If you want a 2 meter buy or make one. Cut five 19 inch coat hangers, get a male pl 259 and make a ground plane.. One in the top and 4 radials in the other holes at 45 degrees. Ham Radio 2m/70cm Vertical Dipole Antenna. A simple ham radio 2 ...
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