11 antenna

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11 antenna

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Antennas : 20M : 20 meter Dipole Antennas Antennas : 23cm Antennas : 2M
  • Two elements Telescopic Yagi for 2 Meters - A lightweight PVC hand-held telescopic 2 element 2m (145 MHz) yagi using two pairs of TV rabbit ear antennas as the driven and reflector elements. Approximate directional gain is 5dB.
    [ Hits: 161 | Votes: 0 | Rating: 0 ]
Antennas : 4M
  • 70Mhz (4 metre) Delta Loop Antenna - Discover the success story of creating a 4-meter Delta Loop antenna, ideal for improving radio communication. This horizontally polarized antenna offers efficient performance when mounted at VHF heights, catering to both HF and VHF characteristics. A simple, DIY project suitable for portable setups, providing versatile options for radio enthusiasts.
    [ Hits: 53 | Votes: 1 | Rating: 4 ]
Antennas : 6M
  • 6m Oblong Loop Antenna - Homebrew 6 meters antenna for SOTA and Parks activations.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]
Antennas : 70cm Antennas : CobWeb
  • A Cobwebb antenna homebrew - A homebrew cobwebb antenna for HF bands covering from 10 to 20 meters band.
    [ Hits: 175 | Votes: 1 | Rating: 10 ]
Antennas : Dipole
  • Dipole Antennas - Basics - Antenna most often used by Hams around the world. Inexpensive, effective and easy to build, what more could anyone ask for in a home made antenna.
    [ Hits: 160 | Votes: 0 | Rating: 0 ]
  • 80m-40m Loaded Dipole - A dual band dipole antenna for 40 and 80 meters band. Total lenght of 26 meters, foreseen two coils at aprox 11 meters distance from center feed.
    [ Hits: 244 | Votes: 4 | Rating: 5 ]
Antennas : End-Fed
  • 8010 Enfed Antenna - With this antenna the coverage is 80,40,20,15 and 10 meter band without any antenna tuner and the average SWR is below 1.2 on phone bands. The total antenna lenght is about 23 meters , with one 20.4 meters long segment from the 1:49 transformer to the 110uh coil and about 2.2 meters long segment from the coil to the insulator.
    [ Hits: 137 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Choke
  • RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
    [ Hits: 85 | Votes: 0 | Rating: 0 ]
Antennas : Installation
  • Introduction to HFTA HF Terrain Assessment - A complete guide to plan antenna installation by using several tools and resources including the popular HFTA High-Frequency Terrain Assessment software distributed by ARRL. A full tutorial on how to use it and how to interpretate reports produced by this antenna setup analysis tool.
    [ Hits: 135 | Votes: 1 | Rating: 7 ]
Antennas : Magnetic Loop
  • Loop magnetic antenna for 80-160 meters band - Jeri Ellsworthhas started a video series devoted to building a magnetic loop antenna for the 160- and 80-meter bands. The first video, included after the break, is an overview of the rationale behind a magnetic loop
    [ Hits: 174 | Votes: 0 | Rating: 0 ]
Antennas : Repair and Maintenance
  • Cushcraft R7000 Prob/Repair - Repairing a Cushcraft R7000 antenna featuring several problems, mostly concerning coils and the insulating parts of the antenna.
    [ Hits: 209 | Votes: 1 | Rating: 10 ]
Antennas : T2FD
  • T2FD Antenna - Terminated and twisted folded dipole - T2FD is a 600-900 ohms folded dipole, terminated with resistor. Feed impedance is coupled with 50/600 ohms voltage balun. It is a wide band antenna with rather low SWR over the full designed frequency range: antenna tuner is seldom needed.
    [ Hits: 482 | Votes: 0 | Rating: 0 ]
Antennas : Wire
  • The Squid Pole Wire Antenna Re-visited - The author explores enhancing the performance of a 7-meter fiberglass squid pole wire antenna for amateur radio. The wire, resonant at 10MHz, poses impedance challenges on various bands. Experimenting with direct coax feed and UN-UN transformers, the LDG Z11-Pro2 auto-tuner is found effective but may show deceptive SWR readings. The author employs adjustable UN-UN ratios and introduces a custom "porcupine" coil to optimize the antenna's efficiency.
    [ Hits: 87 | Votes: 0 | Rating: 0 ]
Operating Modes : Satellites : CubeSats
  • Greencube (IO-117) Guide to Setup, Software and Operation - Explore the detailed setup, essential software, and operational nuances for Greencube (IO-117), a Medium Earth Orbit (MEO) satellite with a 70cm digipeater, offering DX possibilities for amateur radio enthusiasts. From antenna configurations to software choices, this guide covers everything for a successful Greencube experience.
    [ Hits: 136 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Icom IC-7300
  • Enhancing Icom IC-7300 RX Antenna - Despite the model limitations, such as a single TXRX antenna connector, the author shares a reversible modification involving a coax relay for enhanced functionality, demonstrating the transceiver's adaptability and customization potential.
    [ Hits: 183 | Votes: 1 | Rating: 10 ]
Technical Reference : Arduino
  • Automatic antenna switch with Arduino Nano - Arduino Nano board based antenna coax antenna switch intended for use with ICOM CI-V protocol. When is used alone with transceiver without PC control (CAT software, any logging software with CAT functionality), the CI-V transceive option in TRX setup shall be set to ON.
    [ Hits: 141 | Votes: 1 | Rating: 9 ]
  • IC-7300 Arduino Based Antenna Switch - An Arduino Based Antenna Switch For The IC-7300 that monitors the band voltage from the rear accessory socket on the IC-7300. Two RF antenna relays are used to switch to the appropriate output.
    [ Hits: 123 | Votes: 0 | Rating: 0 ]

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