coil antenna

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coil antenna

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Antennas : 160M
  • 160m Band Loaded Inverted L Antenna - This is a simple 160 meters antenna, a short loaded inverted L. The linear lenght is 20 meters, with the loading coil at 5 meters from the feedpoint.
    [ Hits: 320 | Votes: 1 | Rating: 7 ]
Antennas : 20M : 20 meter Dipole Antennas Antennas : 20M : 20 meter Vertical Antennas
  • The Vertical Buddi Beam for 20m - The Vertical Buddi Beam on 20m using no Coils. n this article I am going to describe a totally new way to construct and use a very old design the two element Yagi antenna. Unlike the traditional Yagi this design does not require a Tower or a boom, it is 100 percent portable and most important high- performance and easy to assemble using standard Buddipole components.
    [ Hits: 569 | Votes: 2 | Rating: 4.5 ]
Antennas : 40M : 40 meter Dipole Antennas
  • 40m loaded dipole - This is an short dipole for 7 MHz. Total length of this dipole is just 10 meters, 33 feet. Missing lenght is balanced by a coil made of 49 turns of a 40mm diameter pvc pipe. The use of a choke balun is recommended, as always, to adapt the unbalanced coax cable to the balanced antenna, and to prevent RF feed back along the coax shield.
    [ Hits: 192 | Votes: 4 | Rating: 8.75 ]
  • Make a Compatct Dipole for 7 MHz - This article demonstrate how to build and mount a 40 meter loaded dipole using basic materials. This antenna reduce the overall length of an HF dipole through the use of loading coils.
    [ Hits: 215 | Votes: 0 | Rating: 0 ]
Antennas : 6M
  • 50 MHz CLC antenna - A small antenna for 50 MHz made with copper cable loading coils
    [ Hits: 242 | Votes: 0 | Rating: 0 ]
Antennas : 80M
  • 80m Shortened Dipole Antenna - This antenna just requires about 24m of free space instead of 41m that a normal half wave 80m antenna needs to hang up. The so called loaded dipole uses a coil in every dipole arm to electrically lengthen the mechanical too short dipole arms. Every coil has an inductivity of 120 microHenry.
    [ Hits: 152 | Votes: 0 | Rating: 0 ]
Antennas : Antenna Calculators Antennas : Capacitive
  • Microvert Antenna for 40m by ON7IR - A mircovert antenna assembled for the 40m version of the DL7PE antenna. A one meter long aluminum tube with 24mm diameter is used for the base (element 1) and a 50cm aluminum tube with 20mm diameter for element 2 (the extention). A pvc pipe, 34cm long and with a diameter of 38mm, is used to wind the coil on (1mm enamelled copper wire).
    [ Hits: 149 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • 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 ]
  • 20 / 40 Meter Short Coil Loaded Dipole Antenna - Experimenting a 20 40 meter short coil loaded dipole antenna with the goal to keep the total length under 40 feet so that the dipole can be mounted on two 20 foot fiberglass pole to make a 20/40 meter rotatable dipole.
    [ Hits: 345 | Votes: 3 | Rating: 8.67 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End-Fed Half-Wave Antenna for 20m 40m 80m - How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.
    [ Hits: 139 | Votes: 1 | Rating: 4 ]
Antennas : Feed Lines : Choke
  • How to find out if your choke works - How many times have you heard the advice to coil a few turns of coax at the antenna end to form a choke. How to find out if your common mode current choke really works
    [ Hits: 209 | Votes: 1 | Rating: 9 ]
Antennas : J-Pole
  • Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
    [ Hits: 189 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • PAC-12 Antenna modification - A Multiband Slinky Coil for the PAC-12 portable Antenna, can be used also as a dual PAC-12 dipole by James Bennett
    [ Hits: 264 | Votes: 2 | Rating: 10 ]
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 : 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 ]
Manufacturers : Antenna Parts
  • Wolf River Coil - Vertical Base Replacement Coil. Wolf River Coil build quality antenna coils that are easy to tune and easy to install.
    [ Hits: 165 | Votes: 0 | Rating: 0 ]
Technical Reference : 3D Printed Projects
  • Yeggi 3D printable Models for Ham Radio - Yeggi search engine results for amateur radio 3d printable models. If you are looking for 3d ham radio parts like loading coils, stands for radio, cases, antenna insulators and antenna supports here you will find many ready to use 3d models
    [ Hits: 255 | Votes: 0 | Rating: 0 ]

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