The 6V6  (P/N 154-089, 154-0089-00) is a 12-watt beam power pentode vacuum tube in a glass or metal package with an octal base.

6V6GTA Tube

The 6V6GT is the same with a glass bulb instead of a steel body.

Links

Used in

Some instruments using part 6V6

Instrument Manufacturer Class Model Description Introduced
511 Tektronix Oscilloscope 511 10 MHz Tube scope
First Tektronix oscilloscope
1947