The Radio Robot. Ralph Stair of the Bureau of Standards has invented t...
Public domain photograph of stairs, steps, free to use, no copyright restrictions image - Picryl description
Removing impurities from polished rice before polishing. Vacuum tubes ...
Public domain photograph - historical image of Louisiana, United States, free to use, no copyright restrictions image - Picryl description
![[Sustainability 2] 412-DSP-2-Sustainability_030.jpg](https://cache.getarchive.net/Prod/thumb/cdn10/L3Bob3RvLzIwMTUvMDMvMTYvc3VzdGFpbmFiaWxpdHktMi00MTItZHNwLTItc3VzdGFpbmFiaWxpdHlfMDMwanBnLTE1MGU2MS0xMDI0LmpwZw%3D%3D/40/60/webp "[Sustainability 2] 412-DSP-2-Sustainability_030.jpg")
[Sustainability 2] 412-DSP-2-Sustainability_030.jpg
The original digital file had the following descriptive metadata embedded in its header: Description: USEPA Photo by Eric Vance. Public domain image Date Picture Taken: 2007-10-19T11:22:33.089-04:00 Byline:... More
A close up of a wall with a number of names on it. Tube radio radio re...
A plaque showing the names of the german train in the museum. Public domain stock photographs related to music and performing arts.
![[Sustainability 2] 412-DSP-2-Sustainability_093_2.jpg](https://cache.getarchive.net/Prod/thumb/cdn10/L3Bob3RvLzIwMTUvMDMvMTYvc3VzdGFpbmFiaWxpdHktMi00MTItZHNwLTItc3VzdGFpbmFiaWxpdHlfMDkzXzJqcGctYWVjZGU4LTEwMjQuanBn/40/26/webp "[Sustainability 2] 412-DSP-2-Sustainability_093_2.jpg")
[Sustainability 2] 412-DSP-2-Sustainability_093_2.jpg
The original digital file had the following descriptive metadata embedded in its header: Date Picture Taken: 2007-10-19T11:22:33.089-04:00 Byline: Vance, Eric, EPA chief photographer Byline Title: Photograp... More
![[Sustainability 2] 412-DSP-2-Sustainability_025.jpg](https://cache.getarchive.net/Prod/thumb/cdn10/L3Bob3RvLzIwMTUvMDMvMTYvc3VzdGFpbmFiaWxpdHktMi00MTItZHNwLTItc3VzdGFpbmFiaWxpdHlfMDI1anBnLWYyMDBlMi0xMDI0LmpwZw%3D%3D/40/26/webp "[Sustainability 2] 412-DSP-2-Sustainability_025.jpg")
[Sustainability 2] 412-DSP-2-Sustainability_025.jpg
The original digital file had the following descriptive metadata embedded in its header: Description: USEPA Photo by Eric Vance. Public domain image Date Picture Taken: 2007-10-19T11:08:54.041-04:00 Byline:... More
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[Sustainability 2] 412-DSP-2-Sustainability_098_2.jpg
The original digital file had the following descriptive metadata embedded in its header: Date Picture Taken: 2007-10-19T11:08:54.041-04:00 Byline: Vance, Eric, EPA chief photographer Byline Title: Photograp... More
An old fashioned radio sitting on top of a table. Tube radio radio vac...
A vintage radio with a metal ring around the dial / This image may contain electronics and radio / Public domain vintage photo.
An old fashioned radio sitting on top of a table. Radio tube radio ant...
A radio sitting on top of a table. Old radio on a table public domain stock photo.
A black and white photo of an old radio. Radio tube radio antique, mus...
A radio sitting on top of a table. A radio sitting on top of a table public domain stock photo.
A black and white photo of an old fashioned radio. Radio tube radio an...
A black and white photo of an old radio / A vintage radio sitting on a table / Public domain vintage photo.
Project Tinkertoy 020 - A black and white photo of a machine
Typical dual base plate assembly hydrophone AGC
Project Tinkertoy 025
Typical dual base plate assembly hydrophone AGC
David Jones' entry of a radio float in a procession, c. 1930s, by Sam ...
Format: Photograph Find more detailed information about this photographic collection: 153570 From the collection of the State Library of New South Wales
Vacuum Tube - Pearson Scott Foresman Archives
An electron tube evacuated to a high degree of vacuum
The Radio Telephone Shop, San Francisco, California, advertisement (19...
Advertisement for The Radio Telephone Shop of San Francisco, California. 6UV was the call sign of the company's amateur radio station, which later that year was relicensed as broadcasting station KYY. KYY was ... More
Elektrometerroehren
Deutsch: Zeichnerische Darstellung der Elektrometerröhren T113 und T114
German WWII Vacuum tubes IMG 0753
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0751
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0763
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0752
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0749
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0756
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0757
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0760
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
German WWII Vacuum tubes IMG 0758
Německé druhoválečné elektronky. Po Válce byly i nějakou dobu používány v Československé armádě.
戦時中に開発されたいろいろな真空管
日本語: 戦時中に開発されたいろいろな真空管 東京工業大学博物館・百年記念館（2階：電気〜光/通信の先端研究史）所蔵English: Various vacuum tubes developed by Japan during World War II
森田・西巻研究室のマグネトロン研究で試作された管
日本語: 森田・西巻研究室のマグネトロン研究で試作されたいろいろな管（分割陽極マグネトロンの動作安定化を実現した「均圧環構造」を日本でも独自に考案されたもの）東京工業大学博物館・百年記念館（2階：電気〜光/通信の先端研究史）所蔵
RCA ’808’ Power Vacuum Tube
Deutsch: RCA '808' Elektronenröhre English: RCA ’808’ Power Vacuum Tube Français : Tube électronique '808' de RCA 日本語: アメリカRCA製の電力増幅3極管。本来は送信用の出力管であったが役割を終えた後、近年にオーディオ用真空管アンプ製作者の宍戸氏に依って見いだされされその特性の良さから、真空管オー... More
Bell telephone magazine (1922) (14569578077)
Identifier: bellvol25telephonemag00amerrich (find matches) Title: Bell telephone magazine Year: 1922 (1920s) Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Inform... More
Bell telephone magazine (1922) (14753909294)
Identifier: belltelephonemag12amerrich (find matches) Title: Bell telephone magazine Year: 1922 (1920s) Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information... More
Bell telephone magazine (1922) (14775880013)
Identifier: bellvol25telephonemag00amerrich (find matches) Title: Bell telephone magazine Year: 1922 (1920s) Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Inform... More
QST (1915) (14758289692) - Public domain book illustration
Identifier: qstamer00amer (find matches) Title: QST Year: 1915 (1910s) Authors: American Radio Relay League Subjects: Radio Radio Publisher: (Newington, Conn., etc., American Radio Relay League) Contributi... More
The A B C of vacuum tubes in radio reception; an elementary and practi...
Identifier: abcofvacuumtubes00lewi (find matches) Title: The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers.... More
The A B C of vacuum tubes in radio reception; an elementary and practi...
Identifier: abcofvacuumtubes00lewi (find matches) Title: The A B C of vacuum tubes in radio reception; an elementary and practical book on the theory and operation of vacuum tubes as detectors and amplifiers.... More
Anthony J. Bianculli (b. 1925) (4730108248)
Subject: Bianculli, Anthony J. 1925- RCA Corporation Type: Black-and-white photographs Date: 1959 3-11-1959 Topic: Mechanical engineering Local number: SIA Acc. 90-105 [SIA2007-0203] Summary: In this... More
Fundamentals of the vacuum tube
RADIO INSTRUCTION COURSE.
W W Grant Ltd advertisement (1923)
W. W. Grant sold radio equipment in Calgary, Alberta Canada and also founded, in 1922, radio station CFCN
PSM V79 D205 Vacuum tube of gas phosphorescence
Vacuum tube of gas phosphorescence