audio signal generator

Antenna Height Above Average Terrain - Antenna Height Above Average Terrain (HAAT) Calculator

Royal Signals Awards - Society awards, awards rules, radio contests

San RomanoFire Dep. Live Radio - San Romano Valley, California, Fire department live audio stream

Hamnet - Listen to the SARL Hamnet weekly audio report transmitted on Amateur Radio Mirror International Sundays at 10 CAT Sunday

Southwest Windpower - Producer of small wind generators and renewable wind energy products

De Walt - Portable heavy-duty gas generators

Generac - A manufacturer of standby and prime power generator sets for industrial, telecommunication, commercial, small business, mobile and residential applications.

Eastern Tools - Gasoline generators,diesel generators, portable generators

Blue Max - Portable generators and accessories

Boliy Inverter Generators - Maker of power generators and other power related products

Vestas - Worldwide leader in wind power generators

Timewave - Sells leading-edge voice and digital communications products to the world-wide military, government, industrial, and amateur radio marketplaces. Bluetooth Remote Audio/PTT, Rig Controller with Audio & PTT , HamLinkUSB Rig Control, Noise filtersm antenna analyzers, Multimode Data Controller, TNC, Packet Radio Terminal Node Controller. USB2RS232

MFJ Enterprises  ^pop - MFJ manufacturer of ham radio antenna products, antenna tuners, antenna analyzers, morse code & CW, SWR wattmeters, antenna accessories , power supplies, audio filters, TVI filters, baluns, coax switches and more

Learn Morse code - Morse code basics by Jack G6UNC, morse code signals, procedure signals, Q codes and RST reference

Mikes Windmill Shop - Mike's windmill shop offers you quality wind power that is affordable. alternative energy - wind power generators, permanent magnet alternators, solar panel power.

Tower Electronics - PL-259, Motorola & N connectors, Coax Seal, universal adapter kit, TNC, Mini-UHF, SMA, F & BNC connectors, audio connectors,antenna mounts and antennas

RF Stuff - Online shop for two way radio communications and amateur radio products, antennas, coax and cables, adapters and mounts, accessories and audio parts

Alliance Test Equipment - Alliance Test buys and sells used network analyzers, spectrum analyzers, function generators, mulitmeters, probes, optical power meters, calibrators, attenuators, testers, and more from Tektronix, Fluke, Rhode & Schwarz, Advantest, LeCroy, Fujikura, California Instruments, NetTest, Keithley, Actrena / TCC, Instek

MetricTest - New and used test equipment, oscilloscope, spectrum analyzers, multimeters, signal generators, power supplies, network and signal analyzers and more

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

ARRL Emergency Power - Using portable generators during emergencies or at field day site, using batteries and how to recharge them, using solar panels.

Legendary microphones for ham radio - Graph of the frequency response of some of the legendary microphones favoured by radio hams

What's a diplexer? - It's a network that splits a signal to two or more loads, dependent on frequency. It is the simplest form of a multiplexer, which can split a signal into many different signal bands.

Bluetooth Audio and Amateur Radio - Bluetooth headsets are very common with cell phone users. As such, many amateurs may already own a Bluetooth (BT) headset. So why not use it with amateur radio?

KI5YN QLF Filter - A microprocessor based interface designed to go between a standard Morse code key and a radio transmitter. The circuit receives a signal from the key, processes it, and re-transmits it to the radio.