Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering Magazine Articles Engineering software RF Cafe Archives Magazine Sponsor RF Cafe Sponsor Links Saturday Evening Post NEETS EW Radar Handbook Microwave Museum About RF Cafe Aegis Power Systems Alliance Test Equipment Centric RF Empower RF ISOTEC Reactel RF Connector Technology San Francisco Circuits Anritsu Amplifier Solutions Anatech Electronics Axiom Test Equipment Conduct RF Copper Mountain Technologies Exodus Advanced Communications Innovative Power Products KR Filters LadyBug Technologies Rigol TotalTemp Technologies Werbel Microwave Windfreak Technologies Wireless Telecom Group Withwave RF Cafe Software Resources Vintage Magazines RF Cafe Software WhoIs entry for RF Cafe.com Thank you for visiting RF Cafe!
Copper Mountain Technologies (VNA) - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

RF Cascade Workbook for Excel

RF & Electronics Symbols for Visio

RF & Electronics Symbols for Office

RF & Electronics Stencils for Visio

RF Workbench

T-Shirts, Mugs, Cups, Ball Caps, Mouse Pads

These Are Available for Free

Espresso Engineering Workbook™

Smith Chart™ for Excel

withwave microwave devices - RF Cafe

Bell Telephone Laboratories - Coaxial Cable
December 1949 Radio & Television News

December 1949 Radio & TV News
December 1949 Radio & Television News Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio & Television News, published 1919-1959. All copyrights hereby acknowledged.

When you read today where someone writes about, "back in the eighties...," you naturally think of 1980-something. This 1949 Radio & Television News magazine advertisement from by Bell Telephone Laboratories mention of "back in the eighties" was referencing the 1880s, not the 1980s. What was six decades ago at the time is now thirteen decades ago - yikes!The picture juxtaposes a telephone pole massively populated with horizontal cross timbers, insulators, and wires, with an engineer holding up a section of coaxial cable that was in the process of replacing the poles and wires. Thanks to Bell Labs' relentless R&D efforts, those early single-channel, short distance twisted pairs were obsoleted by 1,800-channel coax. Fiber optic cables today typically support more than 30,000 voice channels.

Bell Telephone Laboratories Advertisement

Bell Telephone Laboratories Advertisement, December 1949 Radio & Television News - RF CafeThey Packed a Pole Line into a Pipe

Back in the eighties, telephone executives faced a dilemma. The public demanded more telephone service. But too often, overloaded telephone poles just couldn't carry the extra wires needed, and in cities there was no room for extra poles. Could wires be packed away in cables underground?

Yes, but in those days wires in cables were only fair conductors of voice vibrations, good only for very short distances. Gradually cables were improved; soon every city call could travel underground; by the early 1900's even cities far apart could be linked by cable.

Then Bell scientists went on to devise ways to get more service out of the wires. They evolved carrier systems which transmit 3, 12, or even 15 voices over a pair of long distance wires. A coaxial cable can carry 1800 conversations or six television pictures. This is another product of the centralized research that means still better service for you in the future.

Bell Telephone Laboratories Exploring and Inventing, Devising and Perfecting, For Continued Improvements and Economies in Telephone Service



Posted March 29, 2023
(updated from original post on 1/18/2017)

Bell Telephone Laboratories Infomercials
withwave microwave devices - RF Cafe
LadyBug RF Power Sensors

Innovative Power Products Passive RF Products - RF Cafe

ConductRF Phased Matched RF Cables - RF Cafe