7788/E810F Amperex PQ Gold Pin Pentode Tube. Designed to operate as a wide band amplifier. New old stock. No longer available for export. MFR: Amperex. SKU: 7788-PQ.
Mullard Holland E810F 7788 CV5809 Valve Tube NOS (V31) | eBay
E810F FC-SC Driver 01 – Bartola® Valves
IS THIS A REAL E810F ??? | diyAudio
E810F Datasheet PDF ( Pinout ) - Special Quality Long Life Pentode