laboratory

radio

glass negatives

library of congress

army

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corps

radio laboratory

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Vy av radiostationslaboratorium, Teleskolan.

Vy av radiostationslaboratorium, Teleskolan.

Vy av radiostationslaboratorium, Teleskolan. Public domain photograph - Sweden in 20th century, no copyright restrictions image - Picryl description

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

Brent Daniel, formerly of the Radio Laboratory of the Bureau of Standa...

A black and white photo of a man sitting in front of an old radio, Library of Congress Harris and Ewing collection Title from negative or negative sleeve. Date span based on active dates of Harris & Ewing, Inc... More

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

Brent Daniel, formerly of the Radio Laboratory of the Bureau of Standa...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

College and Universities - University of Nebraska - Radio Laboratory, University of Nebraska, S.A.T.C. [Student Army Training Corps], practicing with sets

College and Universities - University of Nebraska - Radio Laboratory, ...

College and Universities - University of Nebraska Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

College and Universities - University of Nebraska - Radio Laboratory, University of Nebraska, S.A.T.C. [Student Army Training Corps]

College and Universities - University of Nebraska - Radio Laboratory, ...

College and Universities - University of Nebraska Public domain photograph of an official meeting, group of people, discussion, office table, free to use, no copyright restrictions image - Picryl description

College and Universities - University of Nebraska - Radio Laboratory, University of Nebraska, S.A.T.C. [Student Army Training Corps]

College and Universities - University of Nebraska - Radio Laboratory, ...

College and Universities - University of Nebraska Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

College and Universities - University of Nebraska - Radio Laboratory, University of Nebraska, S.A.T.C. [Student Army Training Corps]

College and Universities - University of Nebraska - Radio Laboratory, ...

College and Universities - University of Nebraska Public domain photograph of an official meeting, group of people, discussion, office table, free to use, no copyright restrictions image - Picryl description

Colleges and Universities - University of California - Student Army Training Corps - University of California. Section in radio operation, Radio Laboratory of the college of Electrical and Mechanical Engineering

Colleges and Universities - University of California - Student Army Tr...

Original Caption: University of California. Section in radio operation, Radio Laboratory of the college of Electrical and Mechanical Engineering. Vocational section of the Student's Army Training Corps. Colleg... More

Colleges and Universities - University of California - School for radio electricians, University of California, Berkeley, California. Lecture room in Radio Laboratory

Colleges and Universities - University of California - School for radi...

Colleges and Universities - University of California Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

Colleges and Universities - University of California - School for radio electricians, University of California, Berkeley, California. Experiment in radio laboratory

Colleges and Universities - University of California - School for radi...

Colleges and Universities - University of California Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

The yardstick is being applied to the measuring of radio waves by means of parallel device of galvanometer, the radio laboratory of the Bureau of Standards has succeeded in measuring very short radio waves, only ten meters in length

The yardstick is being applied to the measuring of radio waves by mean...

A black and white photo of a man standing on a balcony, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. Date based on date of negatives in sam... More

The yardstick is being applied to the measuring of radio waves by means of parallel device of galvanometer, the radio laboratory of the Bureau of Standards has succeeded in measuring very short radio waves, only ten meters in length

The yardstick is being applied to the measuring of radio waves by mean...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

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 inspectors now on the job. Watch out for the ------ Radio inspec...

A black and white photo of a man in a suit and tie. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

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 inspectors now on the job. Watch out for the ------ Radio inspec...

A black and white photo of a man in a suit and tie, Library of Congress Harris and Ewing collection Title from unverified caption data on negative or negative sleeve. On sleeve: Watch Your Credit Line. Copyrig... More