audio filter

TubeRadioDoc Priority listing - Vintage Tube Radio's from Germany for sale. High class restorations for all valve radios offered. Radio Brands like Saba, NordMende, Majestic, Grundig, Zenith, Philco and more. TubeRadioDoc Vintage Audio Store

GB7OK and GB3OK Live Audio Feed - GB7OK and GB3OK Amateur Radio Repeaters located at Bromley, just to the South East of London England

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

Orange County Sheriff Live Radio - Orange County Sheriff Live Audio Feed at radioreference. Florida USA

Clifton Laboratories - Band Reject Filters, Bandpass Filter, Active Antennas, amplifiers and preamplifiers

Cross Country Wireless - UK manufacturer of ham radio accessories, including TNX, SDR receivers, RF Diplexers Triplexers, bandpass filters, iambic memory keyers.

Filter Concepts - Custom EMI Filters, AC DC Three phase filters by Filter Concepts Inc.

FTdx5000 Filter Setup and MARS mod - Installation of the 300 Hz Roofing Filter in the Yaesu FTdx5000 and MARS modification

Scan Stockton Priority listing - Scanner Recordings, Video Clips, Image Gallery From Stockton CA Area. Live Scanner Feed Available. Over a 110 plus audio downloads of fire, police, and other scanner recorded incident traffic. Listen while you browse the site by using the podcast media player.

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

Alpha Uniform SWL DX Radio Club - Welcome to Alpha Uniform Audio Unity DX Gateway to the Lands Down Under Free Memberships

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.

TFilter - Free online FIR filter design - Free online FIR filter design application

RF Cool Tools Real Time Design - RFCoolTools RLC Filter Simulation, S-parameter Plotter, Filter Optimization,Broadband Impedance Match

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.

K9DUR Voice Keyer - Voice Keyer was specifically written to interface to PowerSDR via Virtual Audio Cable (VAC)

MorseDecoder  ^updated - HotPaw MorseDecoder for iPhone and iPad. Translates sounds from mic to text. Includes a DSP narrow band filter.

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

KG9OM Audio Processing setup - Audio processing chain at KG9OM

Single coax filter - Coax Stubs for filters to help separate stations

Cables - A basic article on audio cables, electrical wiring, cable lenght, data cables.

Stub HF filter - Multi transmitter filters for HF Bands

Power netfilter - Homebrew a Power netfilter

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

Crystal tester - Crystal tester project, crystals are used to control the operating frequency of transmitters, and it is used in radio frequency converters, oscillators, filters for cw, ssb and many other applications.