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Antennas : Feed Lines
  • Coaxial Transmitting Chokes - Understanding Common Mode and Differential Mode Currents on Transmission Lines by K9YC
    [ Hits: 1099 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Choke
  • Noise Reduction on 40m - DF9CY implementation of W1HIS suggestion of inserting a common mode choke into a 40m antennas feed-line.
    [ Hits: 1383 | Votes: 0 | Rating: 0 ]
Antennas : Patch
  • Patch antenna for APT - The patch, or microstrip, antenna has become a common workhorse for the microwave spectrum from about 1 GHz to tens of GHz. This type of antenna consists of two conducting layers separated by a dielectric to form an extended capacitor by WlHDX
    [ Hits: 1233 | Votes: 1 | Rating: 10 ]
Antennas : Portable
  • A Q&D Multiband Antenna - A brick, some PVC tubing and a few other common hardware store items can be transformed into an effective Quick and Dirty RF-launcher for less than $25! By Michael Atlas, N7FC
    [ Hits: 1836 | Votes: 0 | Rating: 0 ]
Antennas : Theory : Impedance matching
  • The Clemens Match - About the clemens match for beam antenna, as an alternative to common gamma matching techniques
    [ Hits: 1233 | Votes: 0 | Rating: 0 ]
Antennas : Towers Antennas : Wire
  • Aerials for the Terrified - Summary of common dipole and wire antenna models, from the basic dipole to sloopers, inverted v and multiband wire aerials
    [ Hits: 1287 | Votes: 0 | Rating: 0 ]
DX Resources : Log Analysis
  • HA1AH Contest Evaluator - Contest organizers can use this software to receive e-mails containing contest logs written in the most common Cabrillo file format. The (automatic) evaluation of these Cabrillo files is also supported by creating summary and human readable log files.
    [ Hits: 737 | Votes: 3 | Rating: 7.33 ]
Ham Radio : Clubs : North America : USA : Arizona Ham Radio : Clubs : North America : USA : Michigan
  • TASYL - The purpose of the TASYLs is to promote fellowship among YLs, who share a common bond of Amateur Radio.
    [ Hits: 326 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : Pennsylvania
  • The Nittany Amateur Radio Club - The club is based in State College, Centre County, Pennsylvania, the geographic center of the Commonwealth, in the middle of the Allegheny Mountains.
    [ Hits: 323 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : South Carolina
  • Greenwood Amateur Radio Society, - The Greenwood Amateur Radio Society consists of a group of people who share a common interest in Amateur Radio. Our goal is to further the exchange of information and cooperation between members, to deepen our radio knowledge, improve our operating skills, and to advance the general interest and welfare of Amateur Radio in our community
    [ Hits: 324 | Votes: 0 | Rating: 0 ]
Operating Modes : JT65 Operating Modes : Satellites : AO-51 Radio Equipment : HF Transceivers
  • Kenwood TS-430S mods - Common faults, and modifications for the kenwood TS-430 S
    [ Hits: 4140 | Votes: 44 | Rating: 6.26 ]
Software : DSP
  • NU-Tech - NU-Tech is a powerful DSP platform to validate and real-time debug complex algorithms, simply relying on a common PC. Thanks to an easy plug-in architecture, the developer can write his own NUTSs (NU-Tech Satellites) in C++ and immediately plug them into the graphical interface design environment.
    [ Hits: 839 | Votes: 1 | Rating: 10 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • Power Gride Tubes - Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.
    [ Hits: 1002 | Votes: 2 | Rating: 6.5 ]
Technical Reference : Homebrew
  • Bluetooth Audio and Amateur Radio - Bluetooth headsets are very common with cell phone users. As such, many amateurs may already own a Bluetooth (BT) headset. So why not use it with amateur radio?
    [ Hits: 4244 | Votes: 10 | Rating: 6.6 ]
Technical Reference : Lightning Protection
  • When negative meets positive - Lightning can be a serious hazard depending where you live in the world. Chances are that if you living in an area where lightning strikes are common and you have a communications antenna, it may be attracted to you.
    [ Hits: 427 | Votes: 1 | Rating: 9 ]
Technical Reference : Radio Frequency Interference
  • Intermodulation - Intermodulation distortion, commonly known as Intermods, is a type of interference that can occur in any non-linear junction.
    [ Hits: 541 | Votes: 1 | Rating: 10 ]

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