communication

Derby City Radioactives - The Derby City Radioactives is an organization of hobbyists and enthusiasts involved in multipule aspects of radio communications including CB and Ham (Amateur)radio,FRS/GMRS,Scanning,Shortwave Listening and the new Multi-Use Radio Service(MURS)

Chelan-Douglas RACES Group - The Chelan-Douglas Radio Amateur Civil Emergency Services (RACES) Group provides emergency communications services in times of need to requesting agencies throughout North Central Washington State. Chelan-Douglas RACES is hosted jointly by both Chelan and Douglas County Emergency Management. The group is composed of registered Washington State Emergency Workers who hold an Amateur Class Radio License. All members are volunteers who have other primary jobs, and donate their spare time upon request to support emergency operations.

Utica Shelby Emergency Communications Association - USECA will be holding their 21st Annual Ham Swap. The time and date will be October 29th, 2006 between 8 AM and 1PM. It will be at the Polish-American Century Club located at 33204 Maple Lane Dr. in Sterling Heights.

DCI Digital Communications Inc. - Filters, Duplexers, Combiners Bi-Directional Amps

Star Antenna  ^updated - Communication Electronic designs, manufactures and markets antennas for fixed wireless and mobile wireless applications in a wide range of frequency bands.

Otto engineering - Otto engineering is comprised of two divisions otto controls and otto communications. otto controls designs and manufactures a full line of switches and grips used in heavy equipment, aerospace, marine, medical and other demanding applications. otto communications designs and manufactures audio accessories for two-way radios used in public safety, police, fire, retail, hospitality manufacturing and other markets.

Really Low Frequency Operating - The world below 500 kHz (The wavelength is 1500 meters or just about a mile) has a number of interesting listening and communications opportunities with possibly more to come.

FT-817 / 847 programming - The Yaesu FT-847/817 CAT Command Structure General Overview & Link Communications Repeater Controller's Remote Base Control

The Radio Reference - RadioReference.com, scanner frequency and radio communications reference source, with complete conventional frequency assignments, trunked radio system information, frequencies, and talkgroups, FCC License assignments and maps, 10-Code Lists, agency maps, files, downloads, links, and detailed agency information for most public safety, military, and local government activities.

Radios UK - Two way radios, CB,airband radios & GPS at discount prices - all your communication and radio needs from Radios-UK.

Communication Specialists Ltd - Commercial and Private Two Way Radio Communication equipment manufactured specifically for the United Kingdom, Europe, African, Asian and the USA markets.

Airband - Airband Online, Airband Scanners, Communications Monitoring, Shortwave and WorldSpace Radio Suppliers.

Advanced Communications - Refurbished used test equipment, rfand power amplifier repair, two way radios sales and service

Transeltech - Communications products for hobbyist, industry and law enforcement, antennas, electronic kits, rf audio connectors, scanners. Ohio USA.

Spectra SDR Software Defined Radio - Power Tools, communications architecture wireless mobile middleware tool

VK5VKA 's non technical bpl/plc information - VK5VKA page contains general information and comment on "BPL" (Broadband over Power Lines) or as it is known elsewhere "PLC" (Power Line Communications).

PLC DIgest - The purpose of this web site it to provide you with easy access to all the news and press releases on powerline communications (PLC) and broadband over powerline (BPL)

Powerline communications - Europeam perspective on BPL PLC

EDXC plc report - Power Line Communications, a threat for radio listening, Università degli Studi di Pisa

New Developments with PLC in Japan - The Japan Amateur Radio League (JARL) is cautiously watching new developments concerning the commercialization of Power Line Communications (PLC), while continuing to carry out joint experiments with a high speed power line communication promoters' alliance to reduce potential interference to radio communications.

Bbc : PLC effects - The effects of power-line telecommunications on broadcast reception:

Amperion Inc BPL tests - Amperion Inc. issued an announcement that it has successfully tested its broadband powerline (BPL) technology over high-voltage, 69,000-volt transmission lines.

Are you ready for BPL - Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service

BPL Interference to Radiocommunications - Here are some excerpts from the international radio regulations and fccrules

Software-defined radio by Wikipedia - According to wikipedia a software-defined radio is a radio communication system which uses software for modulation/demodulation of signals