audio tx

A 144 MHz Halo - This halo antenna was built to have an omnidirectional coverage while working in VHF contests. The idea was to have a small but useful antenna for receiving, but it has demonstrated very capable on TX also.

G3TXQ Hex Beam by WY3A - WY3A Homebrew G3TXQ Hex Beam for 5 bands

Building the G3TXQ Hex Beam - This site provides guidelines to build a G3TXQ broad band hex beam R.F. antenna for the five amateur radio bands, 20, 17, 15, 12 and 10 meters. The G3TXQ broad band hex beam is a new development and actually easier to build than the classic hexbeam by K4KIO

W5RTX Beacon - 10 Meter Beacon on 28.259 mhz. 15 W into 1/2 wave vertical.

Amateur radio prices from Ebay - Compare used transceivers prices as sold on Ebay.

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

WIA National News - 30 Minutes of Ham Radio news produced each Saturday and broadcast across the globe by VK1WIA.

Numbers Stations - About numbers stations, and their criptic transmissions, where to listen to them and some audio recording samples by fascinating shortwaves

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

SwissATV - swissATV.ch swiss site dedicated to Ham radio ATV

Predicted Sunspot Numbers and radio flux - Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center

IC-756 Modifications - Spectrum Scope Adjustments, ACC1 Audio Output Increase, General Coverage TX Mod

MM0XDG Yaesu FT-2000 settings - These are the key menu settings for RX and TX Audio that I used to use on the Yaesu FT-2000. I have published them here as a web-based recod for me, but also for the benefit of other licensed amateurs who may be looking for a starting point.

THD-7 Mods - Expanding tx range of a TH-D7A

Kenwood TH-D7a TX band modification - Allows TX 136 - 173.995 and 400 - 479.995

Kenwood TH-D7A modifications - Kenwood TH-D7a TX band modification

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

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.

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

The Rock-Mite - A QRP RTX project by IS0VSU Franco in PDF file

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?

Rookey Kit - Encode/decode On-Off audio pulses for remote control of projects

Unique PSK Transceiver - A novel way to make a PSK rig. Unique transceiver design does not use a SSB transmitter