Duoband-Dipol 2m/70cm: 2m/70cm 2+2/3 El. 2m/70cm 4+5 El. ... Small Duoband-Antenna for 2 m . and 70 cm by DK7ZB. Sometimes a small two-band directional antenna is the first choice for portable operation or for the balcony under restricted conditions. It is not always possible to accommodate a larger directional antenna.Review Summary For : Diamond NR72BNMO 2 meter and 70 cm mobile antenna. Reviews: 22. MSRP: 41.95. Description: It is a 1/4 wave on 2 meters providing 2.15 dBi gain and a 1/2 wave on 440 providing 2.15 dB gain. This antenna can handle up to 100 watts. VSWR is less than 1.5:1. Product is in production.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 …Is your Ham Radio HT rubber ducky letting you down? Do you want to transmit a stronger signal to the repeaters? If so, I'll show you how to build a two meter...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.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....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.Halbwellenstrahler auf 2m. b schwingt bei 70cm und verhält sich daher wie eine koaxiale Kopplung zwischen a und c, die bei 70cm ein Halbwellenstrahler sind. Zur optimalen Anpassung an 50 Ohm gibt es den Impedanzwandler, bestehend aus d und e. Die Länge von d und e ist eher kritisch, durch Variieren kann man ggf. das SWR verbessern.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 …I just finished a dual band yagi (2m/70cm) for about $10 this past weekend. I used KG0ZZ's "$4 Ham Radio Satellite Antenna" design, and it works great! There's an associated video on Dave Tadlock, KG0ZZ's YouTube channel. It provides detailed instructions and a demonstration of its use.Dual Band 2m/70 cm Vertical Ground Plane Antenna. The operational frequencies for this antenna are within the VHF/UHF amateur radio bands; 2-meter band including frequencies from 144 MHz to 148 MHz, and the 70-centimeter band including frequencies from 430 to 440MHz. Because of the dual band capability, this antenna could become your primary ...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.In order to connect a 2m/70cm radio and a 1.25m radio to a triband. antenna (2m/1.25m/70cm), one requires a triplexer and diplexer. I'd. like to cut down on the number and size of equipment to do this. I asked Comet about making a single compact unit that takes 2m/70cm on. one port and 1.25m on the other.I was able to measure 1.3 dB insertion loss through the 2m path and less than 2 dB of insertion loss in the 70 cm path, though admittedly I performed this measurement using a edge launch connector to measure the performance before the enclosure arrived. The next step will be to get this on the air! 2m/70cm Duplexer. 73s,Challenged myself to build a usable Yagi style antenna for the 2 Meter (2M - 144MHz) amateur radio band. The challenge part is that I wanted to use stuff I ...Most people make these for 2m use, but you can make them for 70cm use if required.If you decide to make a 2m antenna, you’ll end up with 1.5 metres of ladder line as the main …Prototyp OSJ-Antenne Duoband 2m/70cm. Prototype OJS-Antenne Befestigung. Entgegen der Behauptung, dass durch den Abstand der Stäbe eine Richtwirkung einträte, kann ich bestätigen, dass dem nicht so ist. Jedoch gibt es aber eine leichte fast unmerkliche Abschwächung im 70cm-Band in die Richtung des langen Abstimmstabes.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!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/0dbdThe resonant frequency can easily be tuned by cutting the monopole, while the impedance can be tuned by folding the radials. * Monopole antennas need a ground plane, so you shouldn't use them with a u.fl to SMA cable assembly. Dipole antennas can be used with u.fl-SMA cables. * Monopole antennas can be used with edge soldered SMA-connectors.The top part of the main element was the 70-cm j-pole and was fed via coax through the main element. It literally looked like a cactus and had some variations including 1.25-meter (tri-band). The "super" j-pole is a co-phased 1/2-wave over 1/2 wave, and can perform accordingly, but as with all j-pole designs, has an irregular radiation pattern.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.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 …I am trying to make my own arrow antenna (the split boom 2m/70cm combined model) but I hit a snag. The manufacturer provides quite detailed assembly instructions which even seem to contain all dimensions of all the element lengths and spacing. But those dimensions seem to be inaccurate, as they don't match photographs of the antenna found on ...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.Apr 2, 2020 · 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...=====More information on my website at http://www.fuzzthepiguy.tech=====Here are the measurem...Keyword Research: People who searched homemade ham antenna 2m 70cm also searchedEmail list: http://eepurl.com/iGP0CkPlans including the STL files: https://www.patreon.com/HamRadioRookie/shop/fara-j-2m-70cm-antenna-88511Patreon Membership...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 …This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters. The finished product will look like this: Let's get started! For the welding rods you need the following: (1) piece 25 & 1/8 inches long. (2) pieces 6 & 1/2 inches long. (2) pieces 19 & 1/2 inches long.DIY - 2m/70cm Groundplane im Selbstbau. Da es mir aktuell an Antennen mangelt, ich aber die Relaissteuerung bzw. auch die Funkgeräte für das Relaisvorhaben testen möchte, habe ich nach einer einfachen und kostengünstigen Antenne gesucht, die insbesondere für den Empfang gedacht sein sollte.Step 4: Measurements. The developed antenna has been measured with a VNA in terms of SWR and S11 parameters. The result shows that antenna has a bandwidth between 419.5 and 451.2 MHz with the respect of SWR of 2:1, which is more than enough for the 70 cm band (430-440 MHz). F4HWK.21 Aug 2018 ... So to put this antenna together, first measure out the elements using the formula. You'll need five. One for the radiator and four for the ...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 ...Figure 1. There are several variations that are 300-ohm twin lead / Coax wire as well as Copper tubing and PCV tubing providing structure to the antenna shape. Dual Band 2m- …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 ...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. Here are the guidelines offered by this construction team: "The ZS6BKW is the successor to the G5RV.Checking out an Icom 746PRO on 2 meters using a copper J-pole antennaon the tower I found the SWR of the J-pole was 3.5 to 1.0 quite high . We had high win...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 YagiMhz 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 ...This antenna was designed for center frequency of 146 MHz and 440 MHz. On 2 meters, this antenna will give you roughly 6dB gain over a full size dipole (6 “dBd”) , and probably 12 dB over the stubby “rubber duckie” antenna that probably accompanied your handheld transceiver. This is because electrically “very-short-for-wavelength ...The Yagi antenna is a directional antenna that typically consists of three elements: a reflector. a dipole. one or more director elements. The reflector is placed at the rear of the dipole. The length is usually 5% more compared to the driven element. The spacing of the reflector from the dipole is about 0.1 to 0.25 of the wavelength.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 ...2m/70cm Dual Band J-Pole by KK4ICE . If you have any questions about this project, contact [email protected]. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer.) This is an excellent performing J-Pole type antenna, constructed from readily available materials.If you need a lightweight, yet sturdy yagi antenna for 2 meter operations, then this project from Kevin Loughin (KB9RLW) is for you. This antenna uses commonly available parts and is suitable for both home and "field" use. Here are some comments from Kevin: This was a long project that worked out very well. The little antenna performs very well ...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 ...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.Here are some of Mike's comments: "The construction of a shop purchased, ZL Special 7 element Yagi antenna for the HAM Radio 2M band. This no frills antenna boasts a 11.5 DBd Gain, is simple to build and works straight out of the box (once put together). Great bit of kit at a good price. Brilliant :) Please subscribe..Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 1 How to Build a Dual-Band Antenna for 2M/70cm. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 ... 10. Finally, adjust position of bracket on conduit for best 2M SWR. 11. Tighten and check all hardware 12. Weatherproof entire area above and between conduit andA 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 ...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 ...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 Satellite feature allows split channel and (2m&70cm), so I wanted a solution to use the 9700 at the QTH. I didnt want to spend a fortune on antennas, so I hunted out a reasoniibly priced 2m and 70cm antenna. For today will talk about the 70c antenna, the DUAL PA432-8-1.2RA. I got mine from Nevada Radio, other places sell them, but I've ...20 Jul 2022 ... I promised this for a long time, to some of the subscribers asking about my dual VHF - UHF vertical dipole antenna.Krzyki. Krzyki is a former borough of Wrocław located in the southern part of the city. On March 21, 1991, the newly created City Office of Wrocław assumed many of the functions previously carried out within the borough. Photo: Wikimedia, Public domain. Ukraine is facing shortages in its brave fight to survive.Wireman-J-Poles for 2m-40m J-Poles with Wireman-cables for the quarterwave matching section, working on VHF and HF bands. 440 Mhz J-Pole Antenna plans Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary.Be sure and subscribe to these great channels:TheSmokinApe: https://www.youtube.com/channel/UCdJlIoWR3mf7apfB1dXS97ATemporarily Offline: http://youtube.com/t...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.This is post 2311 in a continuing series of simple ham radio antennas. Thanks to "Prepping Ohio" for this tutorial on how to build a simple 3-element 2 meter beam antenna. The antenna is vertically polarized, allowing for distant repeat contacts. Most of the materials are available at the nearest hardware store or building supply outlet.The N5WVX 2 Meter 7 Element Yagi with a "Twist". The N5WVX 2 Meter 7 Element Yagi with a "Twist". ( Cool Elements) Based on the 2 Meter Beam Project by. Larry Morgan, AG5Z. It's hot weather in Texas in July and Larry Parker, N5WVX, shows us a novel way to make these "cool" elements for a 2 meter Yagi and also his method of building a gamma match.This is post 2385 in a continuing series of simple ham radio antennas. If you want a basic two-element curtain array, try this "Lazy H" antenna from Hiram Vazquez. The "classic Lazy H Antenna" consists of two horizontally-polarized dipole elements which, under excellent conditions, can deliver up to 3.42 dBd over a standard dipole antenna.DIY Antenna question (2m 70cm) Jump to Latest Follow 3K views 9 replies 7 participants last post by firewallsrus Feb 12, 2018. CPLSeraphim Discussion starter 670 posts · Joined 2015 Add to quote; Only show this user #1 · Feb 5, 2018. I have a question I have been wondering about for making an HT antenna. ...Hi there, G1ZMA kindly decided to build me another antenna for 2m and 70cm and here it is. Amazing what you can achieve with a metre and a bit of old RG58 an...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.Find VHF/UHF Base Vertical Antennas 2 meters Band Coverage and get Free Shipping on Most Orders Over $99 at DX Engineering! Amp up Your Operation with the DX Engineering Super Card – Apply Now! ... Antenna, Vertical, Dual-Band, Base, Fiberglass, 2m, 70cm, 200 W, UHF Female/SO-239, 8.3 ft Height, Each. Part Number: DMN-X200A. 4.95 out of …How To Build A 2 Meter Vertical Antenna. I needed to replace my old 2 Meter vertical antenna for the 146 mHz. amateur radio band. The old one had lost its …The product I chose to construct the j-pole antenna was 3/4 inch copper pipe used for plumbing. Here are the plans to develop a 2 meter J-pole antenna: The above measurements for the J-pole remain in inches. Measurements on overall length, as well as stub length are from the centerline of the splitting up pipe (horizontal) to the top of the ...Das SWR lag auf 2m in Bandmitte bei 1,2(die Antenne ist durch ihr en koaxialen Aufbau sehr breitbandig)und im 70cm Bereich bei 1,3.Nun muss zum SWR-Verhältniss noch Folgendes gesagt werden. Es muss sich genau an die angegebenen Maße für die Koaxialstücke gehalten werden.Vor allem der Stub muss genau bemessen werden.(die 35mm Länge werden von der verlöteten Kurzschlussstelle bis zum ...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.In this video I give an overview of the design and use cases for 2 distinct eggbeater antennas, a DIY eggbeater V2 antenna and a commercially produced eggbea...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.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 ...DIY 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.Section 1: antenna tutorial How to build a turnstile antenna for a 70 cm band (~435 Mhz)? Materials: pipe for the body - I used casual hydraulic PCV from the construction shop; holders for the rods - for me, the 3D print from ABS was the most convenient (if you want to reuse the project, you can find it on GitHub)Odds are there are dozens of HD channels broadcasting over the air in your area right now. If you’re looking to cut the cable cord and save some money, all you need to view them is.... Hi there, G1ZMA kindly decided to build meMar 18, 2013 · 2m Eggbeater II The 2 meter loop 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. Presentation by Joe EI6EG on the construction of a 2m/70cm dual band antenna build. This Antenna is based on VK2ZIO's Flower Pot Antenna. Main Parts. - Antenna is a vertical collinear design. Made up from two half wave sections separated by a coaxial phasing coil. The bottom half of the bottom section radiates from the coaxial cable braid so a choke balun is required to stop currents flowing ... This Parts item by BarberTechnologies has 244 favorites fro...
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