dc converter

W1GQL HexBeam Antenna - W1GQL hex beam antenna project for 20 meters band

6 Elements Yagi for 50 MHz - Vk4ADC 6 elements yagi antenna for 6 meters band

50MHz J-Pole - A 6 m 50MHz J-Pole antenna by VKADC

Harmonically Related Antenna - The HarRe antenna series, multi element quarter wave resonant broadcaters band receiving antenna

WA4FC/B 10 meter Beacon - 28.231 MHz beacon ay WA4FC

BCHF Broadcasters HF NET - BCHF 14.316 MHz Broadcasters HF NET where radio/tv broadcasters-engineers meet 2300 UTC Sunday's

KS1R MARA - Merrymeeting Amateur Radio Association and Midcoast ARES

Missouri Police Scanner - Springfield - Listen to the live Springfield, MO police scanner at SpringfieldCrimeAlert.com include live webcams.

TCI International - US global provider of innovative radio frequency (RF) solutions for spectrum monitoring and antenna applications. Specializes in Spectrum Monitoring, Communications Intelligence , HF/MF Broadcasting & Communication antenna systems.

Valcom - Valcom Guelph specializes in the design and manufacturing of a full range of MF Beacon 100 KHz - 600 KHz, AM Broadcasting 540 - 1700 KHz, HF 1.8 - 30 MHz, VHF 30 - 300 MHz and UHF 300 - 1,200 MHz and SHF up to 6 GHz antennas based in Canada

ASC Signal - Global manufacturer of Satellite Earth Station, Air Traffic Control Radar Antenna and High Frequency Antenna products for broadcast, government and enterprise satellite communication applications.

Kathrein Inc - Manufacturer of professional antenna and filter systems for communications and broadcasting, serving commercial and governmental markets worldwide.

PSI Antennas - Antennas for Broadcasters, PSI manufactures a complete range of slot antennas for UHF television broadcasting

SE Engineering - Manufactures FM antennas, mast ground kits, 75 ohm isolation transformer, for the broadcast industry.

The start of broadcasting - A chronological history of the development of radio, up to the start of the broadcasting era by Greg Whiter, VK3CA

ITU Map - Official ITU-R zone map at ITU Broadcasting services division

Field Day Ideas 2008/2009 - Operaring portable during field day by VK4ADC

Ten-Tec Jupiter Resource Site - The ten-tec jupiter 538 resource site by KD4DCY, excellent resource for all Ten-Tec jupiter owners

Medium and Shortwave Listener's Page - DXing listeining mediumwave AM Broadcast Band stations or shortwave radio stations worldwide.

NetCon - A netlist converter for moving schematic and PC board files from OrCAD/PADS to ExpressPCB format.

CW Midi for Windows - A Morse code TEXT-to-MIDI converter that creates a Morse code standard MIDI file from ASCII text.

WSCGen - Signal generator using the PC soundcard to output continuous tone, CW, SSTV, AO-40 telemetry, and PSK31 test signals with variable AWGN. The program will also output to a RIFF .wav file by AE4JY

Increasing Amplifier Relay Speed - Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

QRP AM CW transmitter - A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator

N2PK Vector Network Analyser Answers - G3SEK answers to some practical questions on builing the N2PK VNA Vector Network Analyser