The EL34 is a thermionic valve or vacuum tube of the power pentode type. It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters.
New Old Stock * No longer available for export MFR: General Electric SKU: EL34/6CA7FB-GE
Designed to serve as a voltage amplifier or dual control applications when a grid base pin connection is implemented. New old stock * No longer available for export. MFR: Tung Sol, RCA, GE, Sylvania SKU: 5725W
Special version of the 12AY7. Made with three pieces of mica, halo getter, and black anode plates. New old stock * New Old Stock * No longer available for export. MFR: General Electric Company SKU: 12AY7-6072-JG-GE