20 meter

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20 meter

462 links - and 5 categories

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
  • 20 Meter Rotatable Dipole Antenna - Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes crossing the yard.
    [ Hits: 664 | Votes: 1 | Rating: 10 ]
Antennas : 6M
  • Six Meter Antennas Reviewed - In this article the author describes his personal experience on some antennas for 50 MHz he tested on the field, the six meter Dipole, Vertical, Moxon, a 3 element Yagi and an Omniangle antenna.
    [ Hits: 138 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • Quad Band Inverted V Antenna - An inverted V Dipole antenna for HF bands, working on 10 20 40 and 80 meters band. PDF Presentation
    [ Hits: 379 | Votes: 1 | Rating: 7 ]
Antennas : Moxon
  • HF Multiband Moxon Antenna - A project that describes a build a multiband wire beam antenna. A 3 band single feed moxon antenna for 20,15,10 meters.
    [ Hits: 683 | Votes: 13 | Rating: 7.54 ]
Antennas : Receiving
  • 160 Meters 4 Square Receive Antenna - A four square array receiving antena for the top band, performance is extremely directional and space requirements are really hard to fulfill.
    [ Hits: 179 | Votes: 1 | Rating: 10 ]
Antennas : Stealth
  • Linear Loaded Dipole for 15m and 20m - A small dipole antenna installed inside a balcony. This linear loaded short dipole antenna has been designed at first for the 21 MHz and then adapted for the 20 meters band.
    [ Hits: 620 | Votes: 2 | Rating: 4.5 ]
Antennas : VHF UHF
  • IAT Interactive Antenna Table - IAT is an excel sheet table evaluate parameters of VHF UHF antennas edited by Vladimir UR5EAZ. The difference between this tool and the existing VE7BQH Antenna Table is the use of G / T and C / N instead of the G / Ta parameter. In this table, Vladimir applies the ITU recommendations to assess the noise properties of a radio receiving system and shows the advantage of the G / T concept over the G / Ta concept when choosing an antenna.
    [ Hits: 104 | Votes: 4 | Rating: 9.5 ]
Antennas : Vertical
  • 5 Band Pipe Vertical Antenna - A simple, cheap and easy to build 26 feet long vertical antenna that works DX on 20 - 10 meters including WARC Bands, it is designed for portability for field days, camping, or permanent installation, cost, and to achieve at least 1/2 wavelength on the WARC bands.
    [ Hits: 549 | Votes: 5 | Rating: 6.2 ]
Internet and Radio : WebSDR
  • WebSDR Wismar - This WebSDR is located in Wismar in the north of Germany JO53RV and operated by Frank Goehling DO7AX. There are four RTL2823U USB dongles with three Ham It UP up-converters for 80m/40m/20m and a RTL2832U for the 2m Band. The Antenna for 80/40/20m is a 84 meters Delta Loop.
    [ Hits: 379 | Votes: 4 | Rating: 10 ]
Operating Modes : 50 Mhz
  • Free eBook - Capture the MAGIC of Six Meters - This book provides plenty of insight into how you, too, can Capture the Magic of Six Meters. It covers propagation, equipment, software, antennas, awards and contesting, as well as assistance in finding the magic.
    [ Hits: 312 | Votes: 0 | Rating: 0 ]
  • Guide to 6 Meter DXing - Getting Started on the Magic Band is a very exaustive article about operating the six meters band. It covers several aspects of operations, techniques, tips and guidelines on getting started on the six meters band.
    [ Hits: 225 | Votes: 0 | Rating: 0 ]
Propagation : Propagation Forecast
  • HF communication prediction tools - Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to predict usable frequency rage for radiocommunications between two stations allowing to specify frequency and date range. This tool allow calculation with different methods and algorithms
    [ Hits: 168 | Votes: 0 | Rating: 0 ]
Propagation : Sporadic E
  • Thunderstorms Causing Sporadic E - A Case For Thunderstorms Causing Sporadic E on 6 Meters. In Propagation and Radio Science, Eric Nichols explains one possible mechanism is thunderstorms that are strong enough to break electrons free forming a cloud of free electrons.
    [ Hits: 79 | Votes: 0 | Rating: 0 ]
Propagation : Sunspots
  • Daily Sunspots groups - All daily drawings of the sunspot groups and USSPS produced by INAF - Catania Astrophysical Observatory from 2009 up today are available in this page. The drawings of sunspot groups and pores are maken by a Cooke refractor (150mm/2230 mm) on a 24.5 cm diameter projected image of the Sun.
    [ Hits: 80 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF YAGI Antennas : Hy-Gain TH3JR
  • Hy-Gain TH3jr Beam Manual online - Hy-Gain TH3jr Tri-band HF 3 Element Beam Covers 10, 15 and 20 Meters assembly instruction manual
    [ Hits: 179 | Votes: 2 | Rating: 5 ]
Technical Reference : QRP Projects Technical Reference : QRP Projects : QRP CW Transceiver
  • QRP 20m Transmitter - The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP transmitter that can be used in combination of one of the simple receivers.
    [ Hits: 151 | Votes: 0 | Rating: 0 ]
Technical Reference : Transverters
  • 2 meter transverter for KX2 - A 144 MHz transverter made by ur3lmz and connected to and Elecraft KX2 transceiver
    [ Hits: 236 | Votes: 0 | Rating: 0 ]

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