Amater Radio

• 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 
• British Amateur Television Club (BATC) - non profit making video engineering club 
• eHam.net - Amateur Radio Community Site  
• 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 
• Finnish Made PMR, Trunking and Cellular (NMT) Phone Amateur Radio Conversion Pages - modification examples for Nokia, Mobira, Televa, Benefon etc. 
• Gateway Projects and Technical Practical aspects of amateur radio - This web page provides several articles to read and projects to build. 
• Grounding Systems for Amateur Radio Stations - you need good grounding for both safety and good operation of radio equipments 
• HAM Intelligent Calculator (HAMIC) - a program designed to simplify a number of calculations commonly used by HAMs, it is designed for the HAM radio hobbyist, but may be useful to others as well. This software is available for a 30-day free trial.  
• Hamquest - an internet auction site created solely for the ham community  
• Ham Radio Online - articles and projects  
• Headset and PTT circuits for popular handheld transcievers  
• ICOM Microphone Notes - how to interface other than original microphones and headsets to it  
• Interface for SSTV using a Soundcard 
• Introduction to Packet Radio 
• Linux HAM HOWTO  
• Manic Hand Builder - Pure amateur hand builders webpage for HAM. Designing PCB mask pattern by MS-paint, make own UV-sensitive thin-filmed PCB from junk PCB. Build DDS VFO controled by PIC16F84. Build ARDF receiver, using PLL LO, controlled with PIC. 
• 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 
• Moppeakatemia - This page has information how to modify old Nokia, Mobira, Benefon, AP, Ericsson/GE, Icom, Motorola, Philips, Storno etc. radios for amateur radio use. The information in this page is available in Finnish and partly in English. 
• Morse Code Beacon Keyer - This circuit sends morse code messages that are stored in an EPROM chip. The keyer can output either a one-shot message such as "CQ DX DE XXXX" if the start button is pushed, or it can run continuously by switching the free run switch on. The continuous mode is useful for making low power (QRP) beacons. 
• Morse Code on The Internet - With Morse code slowly disappearing off the air, there seems to be a growing number of people who carry out conversations in Morse over the internet. Several Windows and Linux clients using VoIP or special protocols, such as EchoLink, EchoLinux, MorseMail, CW Communicator or CWirc exist for Morse lovers worldwide to pound brass and make contact with one another. 
• Morse Code Practice Oscillator  
• Morse Code Buddy Model O-2 Code Practice Oscillator - The Code Buddy was featured as a construction article in the July 1996 issue of Nuts & Volts Magazine.  
• Narrow Bandwidth TeleVision - Ths document illustrates a simple but facinating electromechanical technique for transmitting a small image over amateur radio bands. 
• Online Radio & Electronics Cource - free on-line course orgnaized by Austrailian Amateur Radio Club 
• Packet Radio Linkpage 
• Peter Parker's Project Page - A collection of homebrew projects for the amateur radio enthusiast. A few projects include full constructional articles, but most have just schematic diagrams and a few notes. 
• PSK31 Home Page 
• Radio Interface Schematics 
• Repeater World HQ - Links, links, and more links - 10,000 links to ham radio sites! 
• Sound Card Interface with Tone Keyer - This is an improved version of the audio interface commonly used to connect a PC's soundcard to a transceiver's receive and transmit audio circuits for PSK31, SSTV, . The usual version of this type of interface (including the commercial "RigBlaster") requires the use of a serial port to provide PTT (push-to-talk) control for the radio's transmitter. This version includes an audio tone detector that keys the transmitter whenever transmit audio is generated by the application running on the PC. 
• Sound Card to Radio Interface Home Page 
• SSTV - Slow Scan Television - articles and web links 
• Suomen Radioamat��riliitto ry - The Finnish Amateur Radio League - SRAL  
• S��satelliittiharrastajan k�sikirja - weather satellite reception handlbook in Finnish 
• TAPR - an international organization dedicated to amateur digital communications 
• The Design Of The Brookdale ATV Repeater System Exciter - The ATV exciter described here uses a pair of Hamtronics model TA451 2-watt narrow-band FM voice transmitters to develop video and audio carriers on 439.250 MHz and 443.750 MHz. 
• The DXZone - over 4000 amateur radio links collection, with forums, free classified ads and product reviews 
• The Q code  
• TNC to Transceiver Interface Diagrams - Packet Radio's most complete TNC to Radio diagrams, and illustrations on the worldwide internet. These pages are intended to support the Packet Radio users and the AX.25 digital Amateur Radio Operator. The page describes how to interface to various radios.   
• 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  
• Understanding Soundcard Interfacing - This page is an attempt to correlate the interfacing schemes for various Radio models, and Sound Card configurations.  
• Wireless Network Link Analysis - This tool analyzes the link length available with different antennas and transmitters on different frequency bands. It calculates approximate received power levels and fade margins for wireless links. 
• VK2TIP Ian Purdie's radio design tutorial pages - for amateur, ham radio, electronic project enthusiasts as well as the electronic hobbyist 
• Welcome to Amateur Radio! 
• www.mods.com - www.mods.com is the biggest WWW sites on internet for tips, tricks, and modifications of HAM rigs, HAM modems, etc. Here you will find modifications of all types of HAM radios and HAM modems etc. 
• Yet Another 9k6 Modem - multi-standard modem for packet radio using FPGA chip 
• The G8GTZ Amateur radio and TV reference page - This page has lots of HAM radio and TV links.