6F5

Octal 8-pin high-mu (mu=100) single triode utilizing a top-cap grid connection, designed for high-gain first-stage audio voltage amplification. Equivalents: 6F5G, 6F5GT, VT-87, CV1930. Real-Life Examples: RCA Victor 9K2 console radio, early Wurlitzer jukebox preamplifiers, vintage Western Electric theater audio setups.