How to build your own programming cable for Leixen ham radios (the VV-898 in particular).
A general purpose radio frequency transmitter for Raspberry Pi which doesn't require any other hardware unless filter to avoid intererence. It can handle frequencies from 5 KHz up to 1500 MHz. Plug a wire into GPIO pin 4 (hardware pin 7) and it'll broadcast just about whatever you tell it to. Has an installation script. It's recommended that you use a bandpass filter to minimize noise on the air. Works with just about every RasPi (except the B). Has a text based menu to control it. Defaults to 434 MHz (international free ISM band). You can even broadcast spectrogram pictures! Can even do POCSAG to activate pagers!
An AX.25 packet radio chat protocol with support for digital signatures and binary compression. Like IRC over radio. Note that, because encrypted messages are illegal on ham bands, messages are signed to prevent spoofing but are not encrypted. Requires a TNC to send AX.25 - Direwolf is recommended.
If you're at a security conference, and you've got a ham radio license (of any class), grab your radio and set it to 146.580 simplex (no offset).
Catalog page for a simplex repeater unit that you plug a radio into.
Radio hams and techies in Maryland, Virginia, and DC get together to throw a flea market for geeks. Bring cash.
Not really a service manual but a small website on the HTX-200 hand-held shortwave transceiver from Radio Shack.
A Frequently Asked Questions file about phonetic alphabets. Covers the phonetic alphabets of multiple countries and military forces.
How to turn an ordinary retractable measuring tape into a directional VHF antenna (tm). Good for direction finding.
A worldwide volunteer system of radio hams who provide limited net.access during emergencies so that people can communicate.
The database of radio scanner frequencies at radioreference.com. Curious about what's happening in your area? Tune in and give a listen.
An ARRL affiliated amateur radio organization for members of the LGBT community.
An interactive database of amateur radio repeaters around the country. You can search by state, by zip code, or browse by state and city. Seems pretty comprehensive.
CHIRP is a F/OSS application for programming serial-enabled ham radio equipment from a computer running Linux, MacOSX, or Windows. It supports a large number of makes and models of amateur radio, multiple interfaces (including USB and serial) and formats for getting data into and out of the radio.
DIRE WOLF (Decoded Information from Radio Emissions for Windows Or Linux Fans) is a new software implementation of the APRS protocol. Rather than using a hardware TNC, this software implementation lets you plug the soundcard jacks into your radio to work APRS. The page could stand to be better organized, but you'll find pre-compiled binaries and source code at the Download tab.
tnc softmodem aprs packet-radio ham-radio open-source windows linux software
PSKmail is a software-based narrowband communications package for amateur radio datacomm. It uses multiple PSK modes to achieve different speeds. The client runs on Windows, Linux, and MacOSX. The server is written in Perl. Allows you to send and receive mail, pull text off the Web, send and receive APRS traffic, and chat between clients.
The ARRL's official amateur radio bandplan reference.
Teach yourself morse code... by following a binary tree!
ham-radio -amateur-radio -morse-code -training
minimodem is a command-line utility which implements a virtual FSK (forward shift keying) modem. Hook it into an audio source and it will act just like a modem, sending and receiving data transmissions. Can also interpret recordings of transmissions and generate new ones from traffic you send it. Who needs a serial modem when you've got this?
Maybe I can use this to write my VoIP wardialer?
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