Made by Gustav Ganz & Co., Vienna, Austria. A half-wave vacuum rectifier for a power supply in original box. 220-230 volts. Reference: https://www.radiomuseum.org/tubes/tube_eg100.html. See also, Tyne, "Saga of the Vacuum Tube," pages 463-465.
Id Number: EM.320980Catalog Number: 320980Accession Number: 241556
Object Name: rectifiervacuum tube
Physical Description: cardboard (box material)Measurements: box: 4 1/2 in x 2 1/2 in x 2 1/2 in; 11.43 cm x 6.35 cm x 6.35 cmtube: 4 1/4 in x 2 1/4 in; 10.795 cm x 5.715 cm
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