6Q7GT

Octal 8-pin multi-unit tube housed in a glass envelope, combining two independent signal diodes for AM detection with a high-mu (mu=70) single triode for first-stage audio preamplification. Equivalents: 6Q7, 6Q7G, VT-108, CV1983. Real-Life Examples: Pre-war tabletop and console radios, early commercial jukebox preamplifier panels, classic shortwave radio receivers.