Radio Electronics Pages
Index
Frequency allocation
- An amateur radio design tutorial
- ARRLWeb - the American Radio Relay League's home on the World Wide Web!
- AX.25 Amateur Packet-Radio Link-Layer Protocol
- Baycom Modem - A BAYCOM Packet Radio modem is the cheapest way to get on the air, here is the circuit diagram of it
- Electronic projects and radio design links for the amateur radio and electronics hobby enthusiasts
- Electronic projects by Roberto Barrios - radio programming cable for Kenwood TM-V7 and TM-G707, programming cable for Yaesu FT50, VX1 and VX5 , Luxman I Bus Interface, radio interface box for the Motorola Radius GP300
- Grounding Systems for Amateur Radio Stations - you need good grounding for both safety and good operation of radio equipments
- GW4OFQ's Home Page - amateur radio links
- Hamquest - an internet auction site created solely for the ham community
- Ham Radio Online - articles and projects
- Ilpo J. Leppäsen sivut DX-kuuntelijoille - pages for DX-listeners in Finnish
- Introduction to Packet Radio
- KB0UDF's Mod's And Stuff
- Linux HAM HOWTO
- Meteor & Colorgramme - Radioastronomy Meteor scatter detection software, uses a small electronic interface
- Mini-Circuits Application Notes - collection of RF component and circuit related application notes
- Monitor Internet Amateur Radio Links
- Morse Code Beacon Keyer
- Morse Code Practice Oscillator
- Online Radio & Electronics Cource - free on-line course orgnaized by Austrailian Amateur Radio Club
- Packet Radio Linkpage
- Radio abbreviations
- Radio stuff - useful HAM related documents
- Radio-TNC Wiring Diagrams
- SSTV - Slow Scan Television - articles and web links
- Spokane Repeater Group - information on repeater system wirh overage in Eastern Washington and Northern Idaho, also general radio repeater information
- Suomen Radioamatööriliitto ry - The Finnish Amateur Radio League - SRAL
- Sääsatelliittiharrastajan käsikirja - weather satellite reception handlbook in Finnish
- TAPR - an international organization dedicated to amateur digital communications
- The Morse code
- The phonetic alphabet
- The Q code
- Track and Solve Electrical Interference
- Understanding Power Splitters - how they work, what parameters are critical, and how to select the best value for your application
- VK2TIP Ian Purdie's radio design tutorial pages - for amateur, ham radio, electronic project enthusiasts as well as the electronic hobbyist
- Yet Another 9k6 Modem - multi-standard modem for packet radio using FPGA chip
General
Antenna cabling issues
Antenna building projects
Active antennas
Antenna amplifiers
- 50 Hz - 100 MHz Wide-Band Preamp - ampifier 17..37 dB, uses general purpose transistors
- TV antenna amplifier - covers the frequencies from 40 to 900 MHz, suitable frequency rage for FM or TV antenna amplifier
- Medium Wave Preamp - The tuning voltage is variable from 1 to 12 volts and is designed to cover the medium waveband from about 550Khz to 1650Khz
Antenna baluns
Antenna related measuring equipments
Other antenna related circuits
A system to add text information to FM radio broadcasts which
RDS radios can receive.
Remeber that radio transmitters need a permit to have and operate
at the give frequency. In some countries (USA) you are allowed to do
very small power broadcasts if you do not cause interference
and stay within the FCC limits. In other countries it might be illegal
to have this type of radio transmitter with you (exceptions are
circuits for measurement purposes which are packed in metal boxes and
do not have antenna so can't be used for illegal broadcasting).
Remeber that if you operate a radio transmitter without a permit
you can get quite high fines or go to jail in many countries. Even
owning a radio transmitter without a permit is illegal in many
countries. Check the local legistlation before starting
to build or use any radio transmitter. You should
check the law before buying any transmitting equipment as a fine, confiscation of equipment and/ or imprisonment can result from illegal use or ownership. The laws vary from country to country, and overseas readers should therefore check local laws.
General information
FM transmitters and related circuits
- 2 Transistor FM Voice Transmitter - can be tuned to operate over the range 87-108MHz
- 3W FM Transmitter - operates between 90 and 110 MHz
- 4 Transistor Transmitter - provides an FM modulated signal with an output power of around 500mW at around 100 MHz
- Basic FM Transmitter
- Crystal HF Electronics - radio transmitters and related electronics
- FM Band Monaural Transmitter - Varactor diode gives high quality modulation, pdf file
- FM Broadcast VCO and Buffer - for 88-108 MHz
- FM - PLL Transmitter - for 87,9 to 107,9 Mhz, output power adjustable from 10 to 350 mW, suppy voltage 14-18VDC
- FM Band Monoaural Transmitter - high quality monoaural FM transmitter, FET based oscillator
- FM Stereo Transmiter
- FM Transmitter - low powered FM transmitter, includer circuit board and parts placement picture
- High Fidelity FM stereo matrix generator circuit - circuit is for use with mono transmitters to give out clear stereo output
- Long-range FM Transmitter - power output of 200-250 milliwatts and range up to about 2 kilometres, frequency around 100 MHz
- Low Power FM Transmitter- oprates from 9V battery, frequency range aroun 90-108 MHz, can take microphone or line level signals in
- Micro Power FM Broadcasting Circuits - accessories to transmitter circuits: audio limiter, audio mixer, antenna and essential modifications for Ramsey FM10
- Mighty's Pirate Radio - many radio circuits, including mono and stereo FM transmitters
- Simple FM Band Transmitter - very simple crystal controlled transmitter for 70-110 MHz FM band, no modulation option provided
- Simple FM Transmitter - versions for 30-40 MHz, 40-50 MHz and 90-100 MHz ranges
- Simple FM transmitter - circuit is a simple two transistor (2N2222) FM transmitter powered by a 9 volt battery
- Small Radio Transmitter - information about building a small radio transmitter, which has a PCB 1.75" x 2.5" (45mm x 68 mm) and has a range of about 30 yards or so at 85-108 MHz frequency range
- Um excelente gerador de FM para a faixa de 88 a 108 MHz - PLL syntetized generator of FM for the band of 88 the 108 MHz, text in portugese, you can use automatic translation to English
- We-man's radio circuits - FM transmitters, fax interface and antenna design
FM wireless mics
Ramsey FM10 transmitter kit related circuits
Ramsey FM10 is a popular FM transmitter kit based on BA1404 IC. The kit is sold by Ramsey. The accessories designed for FM10 are useful for other radi projects also.
Telephone transmitters
RF transmitter amplifiers
Other radio transmitters
Radio equipment interfacing
Radio modems
Amplifiers
Modulators
Demodulators
Converters
Oscillators
Radio signal detectors
Remote control
Other
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