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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."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!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 ...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.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 AntennasThis 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 ...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.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 ...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 …16 Jun 2021 ... 70cm/2m antenna build, method of how I built it and tested it. #hamradio #satellite #FM #moxon #yagi #SO-50 #ham #2meter #70cm.Dipole Antenna Calculator. How to build a 2-meter cubical quad antenna. Tri-Band Fan Vertical for 40-80-160 meters. My 5-band attic antenna for Ham Radio. Ciro Mazzoni Baby Loop Antenna. DP200 7-54 MHz 500w Portable Dipole HF Antenna. High Quality Dual Band Antenna for on-the-go ops. Ham Radio: The Coat Hanger Antenna 2m/70cm dipole. Ham Radio ...If you LOVE our channel, and if you want to HELP and SUPPORT our channel, you can do that by JOINING our channel to get access to perks. Feel free to click t...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 ...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.Is this dipole antenna be afective on 70cm? It will resonate and show good SWR, but the emitted pattern will be more like a 4-leaf clover, with a null near the horizon (if vertical) or directly broadside if horizontal. I built the exact same thing and had an swr of nearly 1 on 2m but it was about 3 on 70cm.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. ... Using junction blocks to build the hub of a VHF ground plane antenna. The individual metal pieces are removed from the nylon housing and ...If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by usingI 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.23 Apr 2017 ... VHF UHF antenna basics - DIY antennas from surplus 800mhz antennas for 2m 70cm and dual band · Comments110.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 ...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.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....We built a 2m dipole antenna out of a broom haA Simple 2m/70cm Vertical Dipole Antenna I have t 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 ... Connect the coax cable to the 2 parts of the driven element near where 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.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 ratings Cubical Quad Antennas. If you want to get a real signal s

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 ...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.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 …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 ...

Amazon.com: 2 meter yagi antenna. ... HYS Dual-Band 9.5/11.5dBi 100W Yagi Antenna 8 Element Beam 2 Meter/70 cm VHF/UHF Outdoor Yagi Antenna with U-Bolt for 144/430Mhz Ham Mobile Digital Radio/Repeater (TC-YG08UV) ... Protect & Build Your Brand; Become an Affiliate; Become a Delivery Driver;Building dualband 2m/70cm 3 Elements by 5 Elements Dualband Yagi. If antenna is expensive no problem home brew it yourself. Antenna plans is available at my ...…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Build a 2m VHF lightweight sleeve dipole antenna. A compact portable a. Possible cause: To construct the antenna, first select a suitable length of grey 25mm c.