6SQ7 Vacuum Tube – Diode-Triode Detector & AVC Tube for AC Table Radios

The 6SQ7 is a duplex-diode high-mu triode combining a detector/AVC rectifier and a first-audio gain stage in one envelope — a staple of AC-powered table radios.

• Tube type: Duplex-diode triode
• Base: Octal 8-pin
• Heater: 6.3V AC, 0.3A
• Typical use: Detector, AVC, and first-audio stage in AC-powered table and console radios

AC-filament counterpart to the transformerless-radio 12SQ7.