circuit
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Antennas : Magnetic Loop- 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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