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Description
Heintz & Kaufman Gammatron transmitting "half-tube." According to notes made by John Kaar on the original Perham Foundation accession worksheet, this is an unusual tube in that it is only one half of a tube with a shield where the other half should be. The grid and plate could not go around the filament more than 180 degrees, or it would "surround" the filament and infringe on the basic tube patent. Hence, the "half" tube.
Type
image
Identifier
A5902F85-0EAA-415E-8594-251952191556 2003-1-609
Subject
Heintz and Kaufman Gammatrons Vacuum-tubes--Manufactures (LCSH)
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