RCA Tube Handbook HB-3 Vol. 9-10

Harrison, NJ: Radio Corporation of America. Very Good+. 1943. Ring_Bound. Charts, Tables & Graphs; This is a small format ( 6" x 4" approx. ) clothbound four-ring binder. The binder is in Very Good+ condition and was issued without a dust jacket. There is some beginning rubbing and wear to the spine ends and corners of the book covers. The text pages are in clean, bright condition. There are a number of fold out illustrations and graphs included that are in clean bright condition. "A vacuum tube, electron tube, valve (British usage) , or tube (North America) , is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplification and current rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. " (from Wikipedia) .