CATALOGS:

Sylvania Catalog 1934

Sylvania Price List, 1934

GE Catalog 1944

United 1945

Hytron Catalog

Hytron Catalog (early version)

Amperex Catalog 1946

Heintz & Kaufman Prices, 1936 (Gridless Gammatrons)

Penta Summary Catalogue, 1963

Ref. Data GE Ceramic Tubes, 1965

Spezial Röhren (Tubes of the WW-II RVxx Xxx series)

TUBE DATA:

HK-255 Data Sheet

HK-1054L Data Sheet

HK-3054 Data Sheet

PL-254W Data Sheet

HY-51B Data Sheet

HY-51Z Data Sheet

HY-60 Data Sheet

606 Phantasatron Data Sheet

852 Data Sheet

OTHER INFO:

Series Mercury Arc Rectifier, 1915

Mercury Arc Rectifier Tubes, 1915

Westinghouse Arc Rectifiers, 1921

Westinghouse Arc Rectifiers, 1925

Arc Rectifiers from 1927 ARRL Handbook

PATENT 2,397,591 for the EIMAC HV-1 Vacuum Pump