Eimac Type 150-T transmitting triode vacuum tube, circa 1939. Numbers 7 and 112 stamped on anode. (Perham Collection of Early Electronics)
Eimac transmitting triode vacuum tube Type 450-T, circa 1941. “26,780 hours service United Air Lines Sold 5-2-41” (Perham Collection of Early Electronics)
VT-218 JAN-100TH vacuum tube transmitter manufactured by Industrial and Commercial Electronics (ICE), Belmont, California for Eitel-McCullough during World War II. The glass has an unusual flaw, rippling upwards from the base. (Perham Collection of Early Electronics)
Eitel-McCullough (EIMAC) high power transmitting tube type X-203, Serial Number 13, circa 1944 (Perham Collection of Early Electronics)
Eimac corporate literature, circa 1958 (Perham Collection of Early Electronics)
“The Care and Feeding of Power Tetrodes,” Application Bulletin Number Eight, Eitel-McCuloough Inc., 1951 (Perham Collection of Early Electronics)
Eimac News, September 1954 (Joe Knight Collection, History San Jose)
“Klystron Facts Case Five,” Eitel-McCulough, Inc., 1958 (Perham Collection of Early Electronics)
Eitel-McCullough product brochure, 1958 (Perham Collection of Early Electronics)
Eimac high voltage rectifier Type 253, circa 1960 (Perham Collection of Early Electronics)
Eimac power triode vacuum tube Type 304TL, circa 1960. (Perham Collection of Early Electronics)
Eimac power tetrode vacuum tube Type 4-400A with uncommon graphite anode, circa 1960. (Perham Collection of Early Electronics)
Eimac ad in Electronic News, January 18, 1960 (Perham Collection of Early Electronics)
Eimac Model WDL-AM-92 20kW klystron (Perham Collection of Early Electronics)
