The 6GE8  (P/N 154-0260-00) is a triode-pentode combo vacuum tube with a B9A (Noval) miniature 9-pin base.

The 7734 is the high-reliability version.

It's an unusual tube. Most triode-pentodes contain a small-signal triode. The 7734/6GE8 triode is designed to dissipate some power, typically as the pass element in a linear power supply regulator.

Used in

Links