Summary
Transmitting triode with a plate dissipation of 100 watts. Directly heated 5 volt filament.
Physical Description
Spherical glass bulb with two cylindrical necks top and bottom. The top neck carries a metal top cap for connection to the anode; the bottom neck carries an American 4 pin (UX) base with a ceramic body. A side arm on the bottom neck carries the grid connection.
More Information
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Collection Names
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Collecting Areas
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Acquisition Information
Donation from K. Aitken, 1976
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Manufacturer
Eitel-McCullough Inc., San Bruno, California, United States of America, 1943
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Inscriptions
On bottom neck: EIMAC/Reg. U.S. Pat Off./Pat No. 2310769/100th - VT218/MADE IN U.S.A. On stem (inside valve): W3-51773 Note: The prefix to the serial number written on the pinch (W3) indicates that this valve was made in October 1943 at Eimac's Salt Lake City factory.
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Classification
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Category
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Discipline
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Type of item
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Overall Dimensions
195 mm (Length), 78 mm (Outside Diameter)
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References
See: ...\ Miscellaneous files\US2310769.pdf for patent application, note the beautiful drawings.
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Keywords
