audio spectrum

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.

CSMA - CT Spectrum Management Association

TASMA - Twin-Band Area Spectrum Management Association

NESMC - New England Spectrum Management Council

Listen to National Hurricane Center Skywarn Nets - Live audio of the National Hurricane Center’s Skywarn Nets. This live feed covers several different states, and locations throughout the US including: TX, LA, MS, AL, FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, VT, and ME

Memphis Police Radio - Memphis Police and Shelby County Sheriff dispatch

Denver Police Radio - Live audio feed from Denver Colorado Police

Ingham County Public Safety - Listen to Ingham County Michigan Public Safety, County Sheriff, Police and Fire

Las Vegas Rural Nevada Highway Patrol - Live feed for NHP rural areas of Moapa Laughlin Primm Alamo Indian Springs

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

Tektronix - Spectrum Analyzers - Delivering confidence to confront the most challenging microwave and RF designs. Spectrum Analyzers by Tektronix

Agilent - Spectrum analyzers - Agilent maker of Oscilloscopes, Analyzers, Meters - Spectrum Analyzer (Signal Analyzer)

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

Audio filters and speakers - Review of common audio speakers for mobile setups

Yaesu FT-1000D AGC Mods - Fixing notice subtle distortion on SSB receive audio on the Yaesu FT-1000D

Offshore Radio radio broadcast Staions - live stream - A list of all Long Wave radio broadcast station that you can hear in the most of Europe with web stream audio links.

Voice Keyer for Android - Audio recorder and player for Android. Perfect for Ham Radio (Amateur Radio) operators as a voice keyer for SSB contests or voice beacon.

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

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

Speaker Building - DIY speakers, resources for custom speaker hombrewing

Ofcom PLT - Ofcom and Power Line Telecommunications (PLT)

Circuit Improvements for the TS-440S - Some improvements for the Kenwood TS-440S, including distortion level in SSB in transmitted signals, Lack of crispness in the RX audio and Limited transmit frequency coverage.

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

A Guide to Spectrum Analyzers - What you really need to know about spectrum analyzers

Spectrum Analyzer Tutorial and Basics - A summary or tutorial about the basics of the spectrum analyzer, what it is and what it is used for.