circuit

circuit

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• Antentop: Loop Antennas - Article on radiation patterns of small loops, equivalent circuits of loop antenna, small loops as receiving antennas, ferrite loops
  [ Hits: 2168 | Votes: 4 | Rating: 8 ]

• Short Whip Antenna Tuner - Here is a circuit that will resonate a short whip antenna for the HF Bands.
  [ Hits: 5862 | Votes: 3 | Rating: 4 ]

• Building Coaxial Traps - This page describes the design and construction materials W8WWV used to build a coaxial cable trap. A coaxial cable trap is a parallel resonant circuit that is usually inserted in an antenna element to enable multiband operation.
  [ Hits: 10271 | Votes: 5 | Rating: 8.2 ]
• Multi Band Antenna Traps - These devices are called Traps, but they are actually more like frequency sensitive switches. They are parallel resonant, high Q, tuned circuits which provide a very high impedance at their frequency of resonance.
  [ Hits: 4851 | Votes: 3 | Rating: 6 ]

• Emtech ZM-2 Antenna Tuner Kit - The Emtech ZM-2 Antenna Tuner is a nifty little portable transmatch for QRP (low power). It utilizes the well-known Z-match circuit, which is especially useful for balanced antennas (like dipoles and loops).
  [ Hits: 3431 | Votes: 6 | Rating: 5.33 ]

• RF Circuit design basics - Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design
  [ Hits: 1271 | Votes: 1 | Rating: 1 ]

• Is HF propagation reciprocal - Some test circuits using the ACE-HF System Simulation & Visualization software, about reciprocal propagation on HF bands by NW7US
  [ Hits: 523 | Votes: 1 | Rating: 7 ]

• Far Circuits - FAR Circuits is exclusively a manufacturer of Printed Circuit Boards for electronic projects that are used by the Amateur Radio and electronic hobby enthusiast.
  [ Hits: 2253 | Votes: 0 | Rating: 0 ]

• ExpressPCB - Free PCB software is a snap to learn and use. For the first time, designing circuit boards is simple for the beginner and efficient for the professional.
  [ Hits: 2408 | Votes: 5 | Rating: 5.4 ]
• ViPEC Network Analyzer - This program intended for electronic circuit analysis (mainly for Linux). ViPEC is a powerful tool for the analysis of high frequency, linear electrical networks.
  [ Hits: 1190 | Votes: 0 | Rating: 0 ]

• Qucs - Quite Universal Circuit Simulator - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit. After that simulation has finished you can view the simulation results on a presentation page or window. Run on Linux.
  [ Hits: 1430 | Votes: 1 | Rating: 9 ]

• AA Battery Solar Charger - This almost trivial circuit may be used to charge a pair of AA or AAA sized rechargeable battery cells from sunlight.
  [ Hits: 898 | Votes: 0 | Rating: 0 ]

• AM-6154 FAA Amplifier circuit conversion - AM-6154 222MHz grid Conversion Information by N0UK
  [ Hits: 1508 | Votes: 3 | Rating: 6.33 ]
• TANKIT - A free design aid for vacuum tube linear RF power amplifiers. Determine plate circuit operating parameters and design pi or pi-L tanks quickly and easily.
  [ Hits: 1941 | Votes: 3 | Rating: 10 ]

• Medium Frequency Amplifier Circuits Compared - Mark Connelly, WA1ION article on Medium Frequency Amplifier Circuits in PDF format, include some RF amplifier schematics
  [ Hits: 765 | Votes: 0 | Rating: 0 ]

• Rotator Brake Delay and Protection Circuit - A rotator modification by W4ZT
  [ Hits: 1389 | Votes: 0 | Rating: 0 ]

• Audio processor for SSB transceiver - This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.
  [ Hits: 1447 | Votes: 1 | Rating: 1 ]

• NiCad battery charger - A basic nicad battery charger using a single medium power transistor.
  [ Hits: 334 | Votes: 0 | Rating: 0 ]

• A low cost UHF/VHF duplexer - Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box. This circuit is a design within a cost of US$10.
  [ Hits: 8615 | Votes: 16 | Rating: 5.88 ]

• FM Morse Code Keyer - A simple circuit which will generate a 700 Hz tone into any FM transceiver allowing an amateur to practice CW with another amateur on a 2 meter simplex frequency.
  [ Hits: 2136 | Votes: 3 | Rating: 3.33 ]

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