audio signal generator

T2FD, The Forgotten Antenna - The terminated. tilted, folded dipole T2FD is a little known antenna that performs excellently. Compact in size compared to a half­-wave dipole the T2FD provides signal gain, wide frequency coverage, and exceptionally low noise characteristics.

Pacific T.V. Online Tube Catalog - Vacuum tubes and sockets for radio, audio and amateur use. Over 1500 types, online schematics and technical data

VHQ07 UHF CB Repeater  ^updated - Listen to live audio by VHQ07 Channel 7 UHF CB Repeater located in Brisbane Queensland Australia.

South Florida FM Association - SFFMA 147.000 Repeater audio By KG4LXH

Scan Adelaide Priority listing - Scan Adelaide provides easy access to live SAGRN audio

Listen to Radio Meteors live - Echos of USAF (Formally NAVSPASUR) radar signals reflected off of meteor trails received at Roswell, New Mexico

W3YY FSK CW PC interface - A FSK/CW PC interface that will allow a PC to key your transmitter producing either a pure FSK or CW signal

Micro908 Kit - A re-usable control & computing platform for antenna measurement, PSK31 digital modems, audio filtering, signal source & VFO, memory keyer by AMQRP

Slow CW Sensitivity - DK8KW laboratory tests to get some indication about the ability to communicate with signals below noise level using Slow-CW.

PC Connection Cable for Yaesu FT100 - A simple cable for the yaesu FT-100 or FT-100D and a PC by interfacing audio and serial ports. In Italian

Natural Radio Listening: Streaming Audio - A page about fascinating Very Low Frequency and natural radio, with lots of streaming audio links from remote receivers. Some experimental stereo pairs around the world.

The Tube Center - Supplying over 2000 different vacuum tube types, valves, grid caps, sockets and capacitors. It is easy for Antique collectors, Ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists to buy, sell and trade vacuum tubes, electron tubes, audio tubes, valves, grid caps, sockets and capacitors

ABCVacuumTubes.com - ABC Vacuum Tubes is dedicated to providing Ham radio, amateur radio operators, antique radio enthusiasts, audio professionals and hobbyists the ability to choose from an inventory of over 3.5 Million Vacuum Tubes on hand under one roof.

ZLP Electronics - Yaesu Icom Kenwood CAT Interfaces. Isolated audio-DATA interfaces for ALL afsk DATA modes inc psk31 rtty sstv etc.

Qucs - Quite Universal Circuit Simulator Priority listing - 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.

Morse Code Master - Highly innovative, audio-visual morse code training software for 'slow' and Farnsworth methods from Stratosoft.

BIP Electronics Lab Oscilloscope - Freeware windows oscilloscope uses the sound card's input to measure signals. This means that the quality of the scope depends on the quality of your sound card. The scope automatically uses the highest sample frequency available at the input that you select

Bitscope Waveform Generator - Integrated DSP based waveform generator and timing for BitScope. Arbitrary waveforms, synchronized clocks and external triggers.

SweepGen - SweepGen turns a PC into an Audio Oscillator and Sweep Generator which can be used for testing audio or educational purposes. In conjunction with audio test instruments, you can make frequency response plots. SweepGen uses the sound card in your PC to produce sinewaves

Sine Wave Generator - Freeware windows Wave Generator use the sound card's output as sine wave output. A built in sweep algorithm is used by audio hackers to measure frequency repsonses of their amplifiers

QuickMix - Freeware windows program that allows you to store configuration of your audio mixer in a settings file, and to restore the mixer to that state whenever you want. Useful for digital mode operations where different dsp programs may require different audio in and out settings.

Offset Attenuator for Radio Direction Finding - Instead of acting directly on the incoming signal, an offset attenuator works by adjusting the strength of an offset signal

Audio processor for SSB transceiver - This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.

OH5FAD RF Signal generator - Schematic and information

VK1PK RF Signal generator - 3 to 12 MHz signal generator, simple local signal source