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Acorn tube

Definition of the noun acorn tube

What does acorn tube mean as a name of something?


  1. a small vacuum tube; used at high frequencies


Acorn tube: An acorn tube, or acorn valve, refers to any member of a number of vacuum tubes produced in the USA starting just before World War II. They were named after their resemblance to the acorn, specifically due to the glass cap at one end of the tube that looked similar to the cap on an acorn. The acorn tubes were designed to work at high frequencies, and found widespread use in radios and radar systems. The introduction of the EF50 was the first serious competition for the acorn design, and replaced the acorns in many roles, especially post-war when millions of surplus EF50s were dumped on the market.

Printed dictionaries and other books with definitions for Acorn tube

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Google previewFiber Optics Illustrated Dictionary (2002)

by J.K. Petersen

at/ Acorn Tube The acorn tube, developed for ultra-high frequency (VHF) applications in the ...

Google previewAcademic Press Dictionary of Science and Technology (1992)

by Christopher G. Morris, Academic Press

acorn tube Electronics, an electron tube designed to function at UHF.

Google previewThe Telecommunications Illustrated Dictionary, Second Edition (2002)

by J.K. Petersen

See acorn tube. bar code Identification, information, and management code designed for optical scanning by a reading device. Black and white visual bar codes are ...

Google previewWebster's II New College Dictionary (2005)

by Webster's New World Dictionary, Editors Of Webster's II Dictionaries

acorn tube n. A small, acorn-shaped vacuum tube ...

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