audio analysers

QW Telnet DX-Cluster - One of the first DX-Cluster Telnet Clients ever. QWTelnet is a DX-Cluster telnet-programm and SOTAwatch parser with audio alerts, so that you not always have to pay attention to the screen.

GB3DC Repeater live - Listen to the live audio stream from the GB3DC repeater

Council Bluffs area Police Scanner - Council Bluffs area Sheriff, Police, Fire, and State Police IOWA

Indiana State Police Live Scanner - Live steaming audio of Allen County Police & Fire dispatch and Indiana State Police dispatch.

Illinois - Chicago Police - Illinois Cook County, police scanner includes Chicago Fire Dispatch channels (North, South, and HazMat)

Detroit Fire Department Scanner feed - Detroit Fire Department Radio Feed

Waterloo Police Scanner - Live police scanner Region of Waterloo

Memphis Police Radio - Memphis Police and Shelby County Sheriff dispatch

Denver Police Radio - Live audio feed from Denver Colorado Police

xggcomms.com Interfaces - Xggcomms specialise in producing cost effective, high quality CAT and Audio interfaces for Icom and Yaesu Amateur Radio Equipment

Aaronia AG - Spectrum Analyzers - Handheld RF Spectrum Analyzer, EMC & Pre-Compliance Antennas, USB Analysers, Near Field Probes, EMF Shieldings

Tubes.ru - specialize in trading Russian vacuum tubes used in broadcasting, amateur radio, Hi-Fi audio, meteorology, communication, medical applications and industr

Amplitude Modulation - Amplitude Modulation (AM) is essentially a mixing process where the audio modulating signal is mixed with the radio frequency carrier

Drake TR-7 Improvements - Installing the Cumbria Designs X-Lock VFO Stabilizer, and Improving The TR7 Audio Quality

Fixed Audio Output for the K2 - W3FPR fixed level AF output fot the Elecraft K2

Yaesu FT2000 ESSB Audio Setup - Audio setting and improvements for Yaesu FT-2000 by k6jrf

EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications

Integrated Circuit Audio Amplifiers - Circuit designs for IC audio amplifiers by N1HFX

Design Guidelines for JFET Audio Preamplifier Circuits - Design Guidelines for JFET Audio Preamplifier Circuits By Mike Martell N1HFX

Microphone sensivity calculators - Mic online calculator , Microphone Dynamic Range Calculator, Microphone Sensitivity Calculator

Speaker Building - DIY speakers, resources for custom speaker hombrewing

QRP NESCAF Kit - The New England QRP NESCAF Kit Switched Capacitor Audio Filter by N5ESE

Switched Capacitive Audio Filter - NEScaf: A Switched Capacitive Audio Filter

30 m Band Direct Conversion Receiver - The direct conversion receiver described consists of only a bandpass filter, mixer IC, VFO and audio filter. With only 22 parts, this simple circuit should take a few hours at the weekend to construct.

CAT Interface project - CAT & audio interface version 3 by pa5ca