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Brent Daniel, formerly of the Radio Laboratory of the Bureau of Standards at Washington, with the first portable Super-Heterodyne, his own design. The seven vacuum tubes, batteries, loop antenna, loud speaker, and other necessary units are completely self-contained in the carrying case. He has been able to hear Pacific Coast stations from this outfit
Radio inspectors now on the job. Watch out for the ------ Radio inspectors will get you! Broadcasting stations that do not keep on their own wave LE may expect to receive a hurry call from a person resembling a physician with a medical case---In fact, however, he is RA Inspector with a portable frequency indicator. This device designed by the Radio Laboratory of the Bureau of Standards
First radio vacuum tube. Carl W. Mitman, Curator of Engineering, US Nat'l Museum, holding what is believed to be the 1st radio tube. It was made in 1898 by D. Mefarlan Moore of NY. Radio waves emanating from this tube ignited a bomb a city block away and blew up a miniature of the Battleship Maine
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Defends use of high-powered radio stations, Washington, D.C. Oct, 7. Appearing before the Federal Communications Commission today, Powell Crosley, Jr., of the Crosley Radio Corp., defended the use of high-powered broadcasting stations. The Crosley Corporation operates station WLW at Cincinnati, Ohio, which is operated on 500 kilowatts, the highest in the country. High-powered station cause no serious or damaging interference to the reception of other stations, Crosley added. He is shown in this photograph with Anning S. Prall (right) chairman of the FCC
Radio inspectors now on the job. Watch out for the ------ Radio inspectors will get you! Broadcasting stations that do not keep on their own wave LE may expect to receive a hurry call from a person resembling a physician with a medical case---In fact, however, he is RA Inspector with a portable frequency indicator. This device designed by the Radio Laboratory of the Bureau of Standards
Radio waves high flyers, Washington, D.C., Oct. 1. Experiments conducted by H.W. Wellex at the radio station of the Carnegie Institution have proven that radio waves travel a distance of 80 miles heavenword before they are reflected back to earth. Traveling like lightning as they ascend in to the ionosphere the radio impulses have to be measured in 10,000ths of second to accurately check the height reached before they return to the radio set
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Defends use of high-powered radio stations, Washington, D.C. Oct, 7. Appearing before the Federal Communications Commission today, Powell Crosley, Jr., of the Crosley Radio Corp., defended the use of high-powered broadcasting stations. The Crosley Corporation operates station WLW at Cincinnati, Ohio, which is operated on 500 kilowatts, the highest in the country. High-powered station cause no serious or damaging interference to the reception of other stations, Crosley added. He is shown in this photograph with Anning S. Prall (right) chairman of the FCC
Brent Daniel, formerly of the Radio Laboratory of the Bureau of Standards at Washington, with the first portable Super-Heterodyne, his own design. The seven vacuum tubes, batteries, loop antenna, loud speaker, and other necessary units are completely self-contained in the carrying case. He has been able to hear Pacific Coast stations from this outfit
Summary
Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description
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Tags
glass negatives
brent
daniel
brent daniel
radio
laboratory
radio laboratory
bureau
standards
washington
super heterodyne
design
vacuum
tubes
seven vacuum tubes
batteries
loop
antenna
loop antenna
speaker
units
case
pacific
coast
stations
pacific coast stations
outfit
radio equipment
broadcasting
radio broadcasting
library of congress
Date
01/01/1905
Contributors
Harris & Ewing, photographer
Source
Library of Congress
Link
Copyright info
No known restrictions on publication.