1A7GT Vacuum Tube – Battery Pentagrid Converter for Portable Farm Radios

The 1A7GT is a pentagrid converter built for battery-powered portable and farm radios, combining oscillator and mixer functions in one envelope to save battery drain.

• Tube type: Pentagrid converter
• Base: Octal 8-pin
• Heater: 1.4V, battery filament
• Typical use: Oscillator/mixer (frequency converter) stage in battery-powered portable radios

Low-filament-voltage design intended for A-battery (1.5V cell) operation.