2m 70cm antenna diy
4. Worthy of mention is that 432MHz is a harmonic of 144MHz, meaning that the antenna can be much simpler; if it's (electrically) an odd number of half-waves on 2m, it's also an odd number of half-waves on 432MHz. Share. Improve this answer. answered May 14, 2018 at 1:10.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 .n9taxDualband 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 Yagi
Did you know?
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 ...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 …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 …The antenna can be mounted by clamping the PL259 to a mast or even passing the coax through a 3/4 ID PVC pipe and compression clamping the PL259. Either way let your creativity work for you. If you plan on mounting it outside, apply RTV or sealant around the center pin and PL259, and tape well, to keep water out of the coax.
Simple Wideband Yagi's for 2m and 70cm - Errata and extra pictures. ... I actually simply used a standard TV antenna U bolt with a couple of holes drilled through the boom at a convenient spot. In particular I found which two elements the balance point was between and then put the clamp in the middle between those two elements. ...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.Dual Band 2m-70cm J-Pole Antenna DIY project that can be "Rolled Up" and conveniently transported in you Go Kit and un-rolled when on site. At you station at...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...Either get/build an antenna for each band or find a design that is resonant on multiple bands. Those are common for VHF+UHF, not sure if GMRS+VHF+UHF is generally available. I've got the Comet GP-6NC for GMRS. It's a really great antenna. I also have the ham version Diamond X-300 for 2m/70cm. While either antenna will work for the other ...
Dual band Yagi for 2m and 70cm with 4 elements on 2m and 5 elements on 70cm and one feed point, designed by DK7ZB. A great antenna for amateur radio satellit...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 ...…
Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. Don Murray W9VE Building a Dual-Band Antenna Mentor. Possible cause: Fig. 1 Ultra-simple "wire" version above made on...
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...My mobile setup is a AnyTone AT-778UV feed to a Diamond A320 Tri-band Mobile Antenna mounted to a Diamond NMO hood mount, fed through 18ft of 50hm RG8, SWR and Smith readings as follows; 144.000MHz: SWR = 1.1795, Smith = 44.94Ohms / 6.61 nH. 148.000MHz: SWR = 1.3191, Smith = 63.14Ohms / 1.28 pF.
Here a link to another video of the antenna that shows the measurements. https://youtu.be/MYWTxbUW3RsHomemade full wave antennas for ham radio on 2 meter and...In this video, Dave shows us a simple step-by-step procedure to make a dual-band 2 meter and 70 centimeter ground plane antenna. This antenna will let you connect with both 2 meter and 70 cm repeaters in your area. The antenna is fairly easy to make with locally available materials. This homebrew dual-band antenna is suitable for both home and ...
portola dining hall Building a high performance 3 Elements lightweight end mount Yagi antenna for 70cm UHF band centered at 435 Mhz. This Yagi build exhibits a gain of 7.66dBi at the center frequency 435Mhz for use in the Philippine UHF amateur band. Front to back ratio is 18.5dB, Vertical Beamwidth 106°, Horizontal Beamwidth 64°. Just like my […] sniffles cruise websitetimesheet reminder gif This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead. (The same type used for TV antenna installations.) It is very easy to build and does not take days to construct. The measurements above are not extremly critical but may have to be lengthened or shortened for your particular operating frequency. nicaragua craigslist The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band, in PDF Format. 2 Meters Bicycle Antenna. 2 Meter Antenna for Bicycle Mobile Operation. Build a 2 Meter 5/4 Wave Antenna. This antenna is unique in that it is enclosed entirely in 3/4" PVC. The Little Stick Antenna. wral weather radar interactivepink and white capsule 44 107rochester doublelist Dual band antenna 2m 70cm applications: The big wheel is a horizontal polarized omni directional antenna. Perfect gain and swr on both bands. 2m shows a 38.5in driven element but with the bent part the wire would be 57.75in long? It's a really great omni antenna for the 2m band. Source: img.17qq.com. Stacking of big wheel antennas to achieve a ...Shop for 2 Meter Antennas here. This antenna is similar in construction to the 2-meter OFC sleeve dipole I built over 8 years ago, but it is a simple center-fed dipole. 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 ... greensburg pa radar Those work ok on 2 m but on 70 cm the radiation pattern is terrible. The YT clowns have probably never heard of antenna modeling. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave parasitic element (also called coupled resonator).April 01, 2024. HAM RADIO: The Coat hanger Antenna 2m/70cm dipole. If you have some unused metal coat hangers in your closet, you can convert some of them into simple, efficient antennas for the 2m/70cm amateur radio bands. In this video, Tim (M0MSN) combines two metal coat hangers and a few spare parts from his ham shack to create a remarkably ... mount dora centra careveil vodka reviewzherka height For VHF or UHF antennas, the solution is fairly simple. Since these antennas are short, they can be mounted at the back of the house where they cannot be seen from the street. A Comet GP-1 base antenna, at just over 4 feet high, can be easily placed on the back side of a roof and give you good 2m/70cm coverage.If you don't mind shifting your DIY attention to a home-brew 6m/10m vertical (perhaps a trap implementation), you might look at a triplexer like this that gives: low pass at <90 MHz for 10/6m; mid pass at 130-200 MHz for 2m; hi pass at 380-500 MHz for 70cm