packet audio clip

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.

FADCA - The Florida Amateur Digital Communication Association Promoting packet radio in the State of Florida

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

GC Telecomar - Maker of Smart Tracker, APRS Beacon, APRS Tracker, packet radio modem, aprs telemetry interface module

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

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

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

LinPac packet radio terminal - Linpac is an extensible Linux packet terminal that supports easy access to concurrent connections (streams), PBBS/FBB forwarding, and support for adding external commands

PocketPacket Mac OS - PocketPacket started as an APRS client for iPhone/iPod Touch/iPad devices, but is also available for the Mac desktop or laptop. PocketPacket incorporates a software-based TNC, allowing you to directly capture and visualize, or encode and transmit 1200 baud packets (AFSK modulation) using a VHF radio transceiver.

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

Glossary of Terms for Crystals - Common terms used referring to crystals

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

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