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95 links

Antennas : Baluns
  • The DC Isolated 1:1 Guanella - The DC Isolated 1:1 Guanella, transmission line transformer by N7ZWY
    [ Hits: 172 | Votes: 0 | Rating: 0.00 ]
Antennas : Satellite
  • Eggbeater II Omni LEO Antenna - Building Eggbeater II Omni low Earth orbit satellite Antennas for 70cm by ZR6AIC
    [ Hits: 555 | Votes: 0 | Rating: 0.00 ]
Antennas : Vertical
  • Two Element Phased Verticals - Two 40 meter phased vertical antennas, project, pictures and description by W4NFR
    [ Hits: 430 | Votes: 2 | Rating: 6.00 ]
Ham Radio : Clubs : North America : USA : New York
  • New York City Amateur Radio Emergency Communications Service NYC-ARECS - New York City Amateur Radio Emergency Communications Service (NYC-ARECS) is a NYC based auxiliary communications service. The organization is made up of amateur radio operators who are trained and dedicated to providing radio communications for governments, civil-preparedness and relief agencies during periods of local, regional, or national civil emergencies. This may include situations such as power failures, explosions, fires, floods, earthquakes or terrorist activities. NYC-ARECS is a participant in the NYC Office of Emergency Management (OEM) Partners in Preparedness program and a member of DHS FEMA's National Preparedness Coalition.
    [ Hits: 225 | Votes: 0 | Rating: 0.00 ]
Operating Modes : Mobile : Motorcycle
  • BikeCam G1OCN Dave - Live streaming video from G1OCN's motorcycle mobile webcam while he occasionaly drives his motor bike around the South coast of England, with google earth tracking map, APRS callsign G1OCN-10.
    [ Hits: 266 | Votes: 1 | Rating: 10.00 ]
Operating Modes : Satellites Propagation : Observatories
  • SuperDARN - An international Radar network for studying the Earth\'s upper atmosphere, ionosphere, and connection into space.
    [ Hits: 104 | Votes: 1 | Rating: 7.00 ]
Propagation : Propagation Forecast
  • Cloud RF - Web VHF/UHF planning - Web based VHF-UHF RF planning powered by SPLAT! and Google Maps. Access via website, Android App or dynamic Google Earth interface.
    [ Hits: 892 | Votes: 17 | Rating: 7.40 ]
Propagation : Resources
  • What the numbers mean in propagation - What the Numbers Mean, and Propagation Predictions--a brief introduction to propagation and the major factors affecting it.
    [ Hits: 270 | Votes: 0 | Rating: 0.00 ]
Propagation : Solar Cycle
  • Sunspot Cycles and Human History - An article edited and published by Michael Mandeville on correlation of sunspot peaks and global events, like recessions or human conflicts. This document include solar cycle charts since Solar Cycle 1749-1751
    [ Hits: 71 | Votes: 0 | Rating: 0.00 ]
Software : Propagation
  • MicroMUF - MicroMUF is a windows free HF propagation calculator that you can use to estimate the MUF (Maximum Usable Frequency) and LUF (Lowest Usable Frequency) between any two points on the Earth.
    [ Hits: 800 | Votes: 1 | Rating: 4.00 ]
Software : RF Coverage Mapping
  • CloudRF - Online radio planning system, allow you to generate accurate radio frequency predictions for anywhere on earth
    [ Hits: 2200 | Votes: 20 | Rating: 4.00 ]
Technical Reference : Alternative Power Technical Reference : Amplifiers : HF Amplifiers
  • 4-1000A Tube RF Amplifier - Home Brew a 4-1000A RF power amplifier project by W4NFR
    [ Hits: 340 | Votes: 0 | Rating: 0.00 ]
  • GS-35B Tube Amp - 160-10 Meters 1500 Watt Amp - W4NFR
    [ Hits: 338 | Votes: 2 | Rating: 9.50 ]
  • 3-500Z Amplifier Project - This article loaded with nice pictures and schematics, describes a 160-10 meter linear amplifier that uses a pair of 3-500Z triode power tubes. It was designed and constructed by William Moneysmith, W4NFR. The amplifier features fast warm up and 1500-Watt RF output with 100-Watts of drive.
    [ Hits: 582 | Votes: 3 | Rating: 9.33 ]
Technical Reference : Amplifiers : VHF Amplifiers
  • 6m Power Amplifier - Home Brew 6 Meter Amplifier with a single 4CX250B by W4NFR
    [ Hits: 287 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Radio Direction Finding
  • Fox Buster 1 - A Fox transmitter project with picture and schematic by W9XL
    [ Hits: 116 | Votes: 0 | Rating: 0.00 ]
  • K9VCN Fox Buster - Schematic and drawings of a Radio Direction Finding trasmitter
    [ Hits: 133 | Votes: 0 | Rating: 0.00 ]
  • 2 Meter RDF system - A portable 2 meter radio direction finding system by W9XL
    [ Hits: 225 | Votes: 1 | Rating: 1.00 ]
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