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RF Cascade Workbook 2018 by RF Cafe
RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Portable Two-Way Radio Phone
March 1955 Air Trails Hobbies for Young Men

March 1955 Air Trails

March 1955 Air Trails Cover - Airplanes and RocketsTable of Contents

These pages from vintage modeling magazines like Flying Aces, Air Trails, American Modeler, American Aircraft Modeler, Young Men, Flying Models, Model Airplane News, R/C Modeler, captured the era. All copyrights acknowledged.

This 1955-era photo of the "Portaphone" might be considered one of the world's first commercially available portable phones. It cannot be considered to be a cellphone in that there were no "cells" of transceiver stations capable of servicing sets moving between cell coverage boundaries. Early portable - or mobile - phones were serviced by a central tower that performed a relay service between the RF device (handset) and the local telephone service. The earliest of those systems, prior to automation, relied on a human operator to patch through calls just like the old panel of (mostly) women that physically connected call lines between both parties. This appeared in the March 1955 issue of Air Trails - Hobbies for Young Men magazine.

Portable Two-Way Radio Phone

Portable two-way radio phone for use in homes, office buildings, construction jobs or farms, operating on "citizens band" (lower right photo) designed by A. Fuller Dean of Chicago. Called Portaphone, set has a range of 8 to 12 miles in open spaces, 800 yards within steel buildings. Power supplied by dry cell battery carried in plastic bag.

 

 

Posted June 4, 2016

 

 

 

Espresso Engineering Workbook


RF Electronics Shapes, Stencils for Office, Visio by RF Cafe

Cafe Press

Academy of Model Aeronautics (AMA) - Airplanes and Rockets

Academy of Model Aeronautics

Tower Hobbies logo - Airplanes and Rockets

Tower Hobbies

Horizon Hobby logo - Airplanes and Rockets

Horizon Hobby

Sig Manufacturing - Airplanes and Rockets

Sig Mfg

Brodak Manufacturing - Airplanes and Rockets

Brodak Mfg