telephone

Echo Horn Antenna at Nasa Images - The Horn reflector antenna at Bell Telephone Laboratories

LF/VLF Portable Loop Antenna - The octoloop antenna is a length of 25 pair telephone wire inside an octagonal loop shield of 3/4 hard copper pipe

Phone line as a SW antenna - This article describes how to use a phone line as a shortwave receiving antenna, but be carefull telephone lines present a potential shock hazard, use at your own risk

The G8EPR Pye Museum - G8EPR pye telecoms museum incorporating.. emeregency services & radiotelephone museum of great britain

Play Things of Past - Vintage tubes, radios, parts, radio books and magazines, old telephones, speakers, phonographs, etc. Retail store in Cleveland, Ohio

K-Com - comprehensive line of products for rejection of Radio Frequency Interference (RFI) to telephone equipment.

Wintenna - Products for mobile communication. Boomerang family of TV antennas, many models of CB antennas, mobile and base station scanner antennas, cordless telephone antennas, cellular antennas, mounts, cables assemblies, and accessories.

K-Y Filter Company - Modem Telephone Super Filters For HF and AM Radio Interference.

DTMF Kit - DTMF-KIT1 board for Transceiver, board for Telephone-Line and Remote-control without a HAM Transceiver

Pacific Research Solutions - Repeater Controllers, Repeater Tone Panels, Telephone Interface, Remote Monitoring Systems, Process Control and TDS Monitors

Connect System - Controllers and Telephone interconnects.

Nathan Stubblefield - Kentucky farmer invents wireless telephone! But was it radio? Facts and folklore about Nathan Stubblefield by Bob Lochte.

Nicola Tesla autobiography - Free pdf book on Nicola Tesla. He is the true unsung prophet of the electric age; without whom our radio, auto ignition, telephone, alternating current power generation and transmission, radio and television would all have been impossible

900MHz telephone frequencies - Frequency table for 900Mhz phones

GM Mobile RadioInstallation guidelines - GM Radio Telephone / Mobile Radio Installation Guidelines

Prestigecom - Australian dealer for UHF CB radios, Amateur Radio HF VHF Radios, GPS navigation systems, two-way radio, cordless telephones, radar detectors, marine electronics, amateur radio gear and many other consumer electronic products.

Pacofoc Research - Manufacturer of Repeater Controllers, Repeater Tone Panels and Telephone Interconnect.

DTMF decoder - A very easy to use program to decode DTMF dial tones found on telephone lines with touch tone phones. The DTMF Decoder is also used for receiving data transmissions over the air in amateur radio frequency bands.

RadioTelephone Tutor - Helps you study for the Ham Radio & FCC GROL exams. Often times, test questions are worded in ways; that fool you. RadioTelephone Tutor drills on missed questions, till you know the answers backwards and forwards. Can take entire question pools in straight, or random order. Creates a practice test; which represents what you would be given in a real exam.

Speak Freely - Free Internet telephone originally written in 1991 by John Walker, mostly a voip software

Lightning Protection : Protecting each I/O line - KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.

Telephone Interference - Telephone EMI, questions and answers on how to solve interference problems to phone lines