The Small rectifier—it is a true, full-power EZ81.
The TAD EZ81 / 6CA4 is a small rectifier tube for 6.3V filaments. It is used in smaller amps, such as the Marshall 1974X, Silvertone amps and in various Hammond organ amplifiers. Also used in many audio amps and in old tube radios.
CALIFORNIA PROPOSITION 65 WARNING