long wave

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long wave

69 links - and 2 categories

Antennas : Array
  • Bobtail dipole - Bobtails are vertical arrays that look like the letter "E" turned 90° clockwise onto its tails. They have 3 quarter wave vertical elements and are one wavelength long. The Half Square is a shortened Bobtail- it has 2 quarter wave vertical elements and is a half wave long.
    [ Hits: 1911 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • Long Wire Dipole Antenna - An basic horizontal half-wave antenna which can be made of ordinary copper wire. The cable should have a cross section of 1 mm 2 or more. The antenna can be stretched between two masts, a house and a mast, or between two apartment buildings.
    [ Hits: 971 | Votes: 6 | Rating: 5.5 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half Wave Antenna Coupler - A home made end-fed half-wave antenna coupler with antenna lenght calculator and counterpoise calculator based on center frequency. Includes pictures and drawings along to antenna homebrewing instructions with a home made on air wound transformer
    [ Hits: 282 | Votes: 0 | Rating: 0 ]
Antennas : Four Square
  • TX Four Square Antenna - A 220-ft tower that has five catenary lines, each about 500 feet long. Four of these lines, running NE, SE, SW, and NW support four 1/4-wavelength wire verticals used in a 160-meter four-square antenna.
    [ Hits: 787 | Votes: 0 | Rating: 0 ]
Antennas : Shortwave
  • Curtain Antenna - An antenna for shortwave radio broadcasting consisting of rows and columns of dipoles, is a high gain directional antenna, designed for medium and long range communications.
    [ Hits: 854 | Votes: 0 | Rating: 0 ]
Antennas : WiFi
  • CantennaCalc - Kioan's calculator for building a Cantenna , directional waveguide antenna for long-range Wi-Fi
    [ Hits: 6693 | Votes: 46 | Rating: 6.75 ]
Antennas : Wire
  • Long wire antenna random wire - About longwire antennas, technically to be a true longwire an antenna needs to be at least one wavelength long, but common use of the term by Hams is for any random wire length that is end fed.
    [ Hits: 1316 | Votes: 2 | Rating: 4 ]
Manufacturers : Antennas : HF : Active antennas
  • Broadband Power Technology - Active Receiving Antennas, designed for reception of shortwave, mediumwave and longwave signals and VHF/UHF signals
    [ Hits: 337 | Votes: 0 | Rating: 0 ]
Manufacturers : Microwave
  • Cobham Microwave - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.
    [ Hits: 477 | Votes: 0 | Rating: 0 ]
  • Reactance Labs - Reactance Labs was started by Tony Long KC6QHP to sell kits and products for builders of amateur radio microwave transceivers and other experimenters
    [ Hits: 306 | Votes: 0 | Rating: 0 ]
Operating Modes : Longwave
  • Ham Radio below 9 kHz - DK8KV Longwave information
    [ Hits: 631 | Votes: 2 | Rating: 6 ]
  • Longwave DXing - Longwave refers to all frequencies below the lower end of the AM broadcasting band at 540 kHz
    [ Hits: 304 | Votes: 0 | Rating: 0 ]
  • Longwave Overview - Longwave operations in Germany by DF0WD/DL4YHF
    [ Hits: 261 | Votes: 0 | Rating: 0 ]
  • Longwave Information - DK8KW Longwave Information Slow-Voice, Transmitting compressed analog Audio Signals on LF
    [ Hits: 238 | Votes: 0 | Rating: 0 ]
  • Longwave Station - DF0WD DL4YHF Longwave Station include a linear transverter and antenna tuner
    [ Hits: 353 | Votes: 0 | Rating: 0 ]
Propagation : Resources
  • Ground Wave Signal Propagation - Article on propagation basics. The ground wave used for radio communications signal propagation on the long, and medium wave bands for local radio communications
    [ Hits: 403 | Votes: 0 | Rating: 0 ]
Radio Scanning : Military
  • HFUnderground - HFUnderground.com is dedicated to documenting longwave, mediumwave, and shortwave stations, including broadcasters, utility/military stations, pirate radio and spy numbers stations.
    [ Hits: 2299 | Votes: 5 | Rating: 6.2 ]
Shortwave Radio : BCL Resources
  • Danny Shortwave And Radio DX - This channel is all about radio listening and dxing. I will be covering frequency bands like longwave, AM/MW and shortwave. I'm embarking on my renew interest in this hobby since my childhood.
    [ Hits: 270 | Votes: 2 | Rating: 10 ]
Shortwave Radio : Schedules
  • Shortwave.am - Shortwave Schedules - Shortwave Radio Schedules from Eibi/AOKI combined lists. Includes Google maps showing beam directions and long paths.
    [ Hits: 1653 | Votes: 2 | Rating: 3 ]
Technical Reference : Standing Wave Ratio
  • What is SWR - standing-wave ratio - Article about Standing-wave ratio (SWR) defined as a mathematical expression of the non-uniformity of an electromagnetic field on a transmission line. SWR is the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line.
    [ Hits: 190 | Votes: 0 | Rating: 0 ]

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