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Antennas : Theory- G3SEK's Amateur Radio Technical Notebook
- A lot of good informations concerning antennas, filters, moonbounce, and circuitry data.
[ Hits: 4669 | Votes: 23 | Rating: 4.69 ]
- Antique Radio Schematics
- Specializes in antique radio schematics, circuit diagrams and service data for vintage tube radios. Carries information for American, Canadian and European antique radios.
[ Hits: 16283 | Votes: 56 | Rating: 5.3 ]
- QRZ.RU Russian HamRadio Server
- Free Russian hamradio server special for radiofanats from CIS. Search engine on callsigns, electronic circuits and hamradio programs in www powered with knowledge base.
[ Hits: 3736 | Votes: 28 | Rating: 4.86 ]
- XMATCH Antenna Tuner
- Ham Radio Antenna Tuners--Full Legal Power--Patented Circuit--Outstanding Efficiency and Power Capability
[ Hits: 5327 | Votes: 14 | Rating: 3.51 ]
- Almost all digital electronics
- This site is dedicated to electronics hobbyists, engineers, and Radio Amateurs interested in circuit design, homebrew and kit projects.
[ Hits: 7695 | Votes: 3 | Rating: 9 ]
- E. H. Armstrong
- Radio's premier inventor, Edwin H. Armstrong was responsible for the Regenerative Circuit (1912), the Superheterodyne Circuit (1918), the Superregenerative Circuit (1922) and the complete FM System (1933)
[ Hits: 962 | Votes: 5 | Rating: 9.4 ]
- ATV De ik1hgi
- Projects and design atv de ik1hgi Progetti, circuits, master, fotos in Italian
[ Hits: 2135 | Votes: 55 | Rating: 8.69 ]
- Yaesu 920 & SoundCard
- This circuit provides an interface between the Yaesu 920 transceiver and IBM computer sound card which allows data transfer and control of PSK31, RTTY, KEYBOARD CW, and SSTV modes for Amateur Radio
[ Hits: 2301 | Votes: 8 | Rating: 3.99 ]
- Morse Tutor
- Morse Tutor is a DOS based program written in C++. It can be used to practice morse code. Various options are available. Morse tutor with Complete Source Code and Binary is available for Download (32KB).
[ Hits: 2610 | Votes: 4 | Rating: 7.75 ]
- TrueTTY
- Program for amateur radio digital communications via a sound card. Supported modes are RTTY (Baudot code), ASCII (7 or 8 bits), PSK31 (BPSK and QPSK) and AMTOR-FEC (SITOR-B, NAVTEX). SELFEC SITOR decoding is possible also. No additional hardware required, need only a sound card. Optionally you can use simple circuit fo PTT-control. Can cooperate with RZ4AG AAlog logger.
[ Hits: 18276 | Votes: 855 | Rating: 7.35 ]
- Zelscope
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- Zelscope is a Windows software that converts your PC into a dual-trace storage oscilloscope and spectrum analyzer. It uses your computer's sound card as analog-to-digital converter, presenting a real-time waveform or spectrum of the signal - which can be music, speech, or output from an electronic circuit.
[ Hits: 71191 | Votes: 29 | Rating: 5.32 ]
- AAVoice digital voice processor
- "Digital voice processor for amateur radio operators. It use prepared ""wav""-files for transmition. Can work in the beacon mode. Optionally you can use simple circuit for PTT-control. It has a lot macros for tramsmitting. Can cooperate with RZ4AG AALog logger."
[ Hits: 6130 | Votes: 133 | Rating: 5.5 ]
- 432 MHz EME PreAmplifier
- 432 MHz EME low noise amplifier. Circuit, components and image by Christoph Petermann DF9CY
[ Hits: 9744 | Votes: 21 | Rating: 5.43 ]
- RS232 Interface
- This simple circuit is intended for older Kenwood radios and was presented in chapter 22 of the ARRL Handbook.
[ Hits: 2288 | Votes: 3 | Rating: 7 ]
- 7 MHz SSB Transceiver
- Circuit diagram and discription of 7 MHz Ham Radio SSB Transceiver. Transceiver using two MC1496, 4.43 MHz Ladder filter, LM386, LM324 and IRF840 in final.
[ Hits: 19045 | Votes: 43 | Rating: 6.48 ]
- Ham Radio Circuits
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- Circuits of SSB Transceiver, AM DSB Transmitter, Antennas, BFO, VFO, 807, FM Mike, Crystal filter and more.
[ Hits: 36138 | Votes: 57 | Rating: 5.36 ]
- HSCW transmit interface box
- Versatile transmit interface circuit
[ Hits: 1955 | Votes: 2 | Rating: 8 ]
- Defpom CB and HAM radio mods
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- Circuit diagrams, CB and HAM mods, alignments, data sheets and pinouts, a massive site with over 600 pages of free info
[ Hits: 54423 | Votes: 12047 | Rating: 8.19 ]
- Interface for MS_DSP
- Minimal interface circuits for receiver and transmitter audio, also for PSK31
[ Hits: 1555 | Votes: 2 | Rating: 5.5 ]
- 50 MHz Transverter idea
- Complete 144/50 MHz transverter with GaAs Fet LNA and 400 mW out. No printed circuit board. Schematics and images by Christoph Petermann DF9CY
[ Hits: 9895 | Votes: 35 | Rating: 5.91 ]
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