bluetooth speaker phones

Sparkmuseum - Vintage radio and scientific apparatus by john jenkins, include antique radios, Horn Loudspeakers, Vacuum Tubes, A.C. Receivers

Noantri Mobile Cluster - Reduces size, web dx cluster for mobile phones, or pda, allow WWV a and search facilities

YV5AJ DX Cluster - DX Cluster optimized for palm devices and other mobile phones

Bracknell Amateur Radio Club - The Club aims to meet the needs of all interested in amateur radio, and has a varied programme of guest speakers, surplus sales, members' interests evenings, and social evenings.

W2ENY - Radio Accessories - Handcrafted Accessories for the shack by W2ENY includes Full range headphones with a mic, computer interfaces, mic ptt adapters

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

ARC electronics - Communications solutions for Business, Utility and Industrial applications including data phones wireless RF

DroidRTTY - DroidRTTY is an Android app to decode and encode Ham Radio RTTY with the build in microphone/speaker or wired to your radio.

JBOT QRP Linear Amplifier - An SSB linear amplifier made from Just a Bunch of Transistors

Heil Microphones DSP Settings - How adjust DSP settings for your trasmitter when using Heil Sound microphones

Yaesu DSP Settings and Pin Connections - Yaesu DSP audio settings for Heil Sound headphones

Anatomy of a Loudspeaker - There are a number of important technical issues relating to the matching of speakers to amplifiers, and to the wiring of multiple speaker systems

Speaker Building - DIY speakers, resources for custom speaker hombrewing

AVR Butterfly Keyer - The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.

Home Build a CT-69 Microphone adapter - This adapter allows the use of 8 Pin round Yaesu microphones on some Yaesu radios with the 6P6C modular socket by MW0GKX

Icom DSP Settings and Pin Connections - ICOM audio DSP settings and pin connections for heil sound headphones

Kenwood DSP Settings and pin connections - Kenwood radios audio DSP settings for Heil Sound headphones

A Homemade Signal Generator - Homebrewing a 3 to 30 Mhz Signal Generator, project and schematic diagram

A Simple Receiver - the DC40 - A beginner's direct conversion receiver

Android Oscilloscope - Run an oscilloscope under your Android phone