speaker mics

The J-pole Antenna Revisited Yet Again - The dynamics of antenna design

Antique Radio Store - Based in San Diego CA, collectible radios, test equipment, tubes, antique radio parts, speakers and kits

The Farmer's Old Radio Notebook - A collection of vintage radios, speakers, and related items.

The Speaker Shop Antique Speaker Repair - Specializing in vintage and antique speaker repair,recone and restoration.

M0XPD's Shack Nasties - Homebrew, QRP, Beacons & Diplomatic / Spy Radio

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.

Cobra Electronics - CB Radios, GPS systems, marine electronics, two way radios, power inverters, speakers, antenna mounts and microphones.

Tennamast - Tennamast design and manufacture a wide range of fabricated metal goods, Antenna masts, Wind-sock masts, and masts for holding such systems as CCTV, Loudspeakers, Lighting units

Coaxial Dynamics - Manufacturer of precision equipment, Power meters Wattmeters

Kotkar Energy Dynamics Priority listing - Vehicle mounted mobile telescopic telecommunication towers, splice vans for OF cable maintenance, BTS shelters.

Jetstream - Antennas, base mobile scanner and vhf antenna, coax cables, coax switch, Lightning Arrestor, mounts, power supply, speakers and wattmeters

FT-817 ND Modifications - DRM reception / SDR output (IF 12 kHz), Using the internal VOX for the data jack, Connection of the mini speaker microfone ICOM HM-46

Yaesu VX-7R hints and tips - Yaesu VX-7 Microphone Audio, Yaesu VX-7 Speaker Repair and the MH-209SMA antenna

Dynamic Signal - The Largest Selection of Cable Assemblies and Accessories. Coaxial Cables, Fiber Optic Cables, Connectors, Attenuators, Terminators, and Tools.

Asia Radio Sales - Online shop based in hong kong offer batteries mic speakers adaptors programming cables earpieces telescopic antennas handheld antennas desktop chargers handheld speakers. Kenwood Icom Yaesu and Alinco dealer

Bob-and-Linda Amateur Radio Catalog - Antennas, books, cables and connectors, mounts, speakers

WD6CNF DSP Filter - Audio Digital Filter, two bandpass filters, three notch filters, two noise filters graphical setting of filter center frequency and bandwidth Drag vertical lines on top of signal, Microphone input, speaker output Mono, 5 kHz bandwidth

Fast Morse - Macintosh morse code software, Fast Morse will convert any text you enter into the original Morse code equivalent, and play it on your speakers. The speed can be adjusted to anything from 1 to 35 words per minute if your computer can keep up, allowing you to send Morse signals at a rate your friends and fellow Morse enthusiasts can follow!

DroidPSK - DroidPSK is an application to decode and encode Ham Radio BPSK31 with the build in microphone/speaker or wired to your radio.

Frequency Response Plotter - Draw static response time of an audio system. Originally intended for loudspeakers tests, is also a great tool for looking at microphone equalisation.

A simple VOX circuit - Here is a 3 transistors 6 diodes circuit that is a Voice Operated Tx PTT control as well as an ANTI VOX circuit to stop mis-operation from Rx noise by G8MNY

A cheap noise reducing speaker - Noise Reduction on the Cheap PDF File

Homebrew external speaker - PE1OPM home made external speaker project

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

SM20 microphone with FT-100D - Use an Icom SM20 microphone with Yaesu FT-100D