audio fft analysis

Analysis of HF Monopoles - Analysis of several monopole antennas, the differences between a perfect and an imperfect ground and effects using a ground plane made of radials or counterpoises.

146MHz 5/8 Ground Plane Antenna - 146MHz 5/8 ground plane tower mounted antenna. The antenna was largely based information and analysis provided by the RSGB's. VHF UHF Manual, fourth edition by G.R.Jessop, G6JP

JA0RUG DX Diary - DX Audio Clip and others Blog by JA0RUG

ARI Prato Italy - Online Repeater - Italian ARI PRATO Amateur Repeater 145.725 Mhz Live Audio Feed

Carteret County Public Safety Live Scanner - Carteret County NC Public Safety Live Scanner Audio Feed

Milwaukee Fire Dep. Audio Feed - City of Milwaukee Fire Department Live Audio Feed

Chicago Fire Dept. Emergency Services - LIVE 911 audio of the Chicago Fire Department North & South channels.

Digital Modes Samples - Audio recording of many ham radio digital modes emissions. Sound samples of HF VHF digital signals samples and published by KB9UKD

Digital Modes Information Page - An overview of digital HF radio operating modes includes a sample audio recording of each digital mode by WB8NUT

Morse Code Sound Samples - G4UCJ morse code table with mp3 morse audio samples

Audio CW Filter - A very effective AF Adaptor, with built-in noise blanker and 30 Hz CW filter modules by PA0LQ

Making the Most of your PSK31 Signal - Adjusting audio output of your soundcard to obtain a perfect PSK signal from your transmission. A project to help you tuning your PSK31 emission.

Yaesu FT-897D PSK and RTTY Operation - Determining the audio input and output connections on the FT-897D.

Mods Kenwood TS-870 ACC2 Input - This mod flattens out the ACC2 audio input low frequency response

G4URH - Yaesu FT2000 Audio Settings - Yaesu FT-2000 Audio Settings 3 stage Parametric Equalizer Speech Processor OFF

FT-897D Audio processing and ALC operation - Audio processing and ALC in the FT-897D

Berlin Scanner Livestream - Ham Radio Livestream from Berlin, Germany.

Scanner Radio for Android - Android app to listen to live audio from over 2,300 police and fire scanners and weather radios from around the world.

EasyAudioStreamer  ^updated - EasyAudioStreamer is free windows software that allow you to easily stream to the network any audio source connected to any audio device available on your PC.

Spek - Spek helps to analyse your audio files by showing their spectrogram. Spek supports all popular lossy and lossless audio file formats. Spek is free software available for Unix, Windows and Mac OS X.

Yaesu DSP Settings for Heil Microphones - To achieve maximum audio quality it is important to adjust the DSP settings of your transmitter when using Heil microphones.

Audio Compressor for SSB - Build an audio Processor and clipper optimised for SSB transmitter

KG9OM Audio Processing setup - Audio processing chain at KG9OM

Spectral Analysis of a CW keying pulse - Key clicks mathematical explanation by W9CF

20m CW QRP Transceiver - The direct-conversion receiver uses an audio-based automatic gain control, an LC tone filter, and a 100-kHz crystal for frequency alignment. The same VFO is used for transmitting and receiving by DC1YB