| Manufacturer | Part Number | Description |
|---|---|---|
Ei |
12AU7 | A.F. Double Triode |
| ETC Unknown Manufacturer | 12AU7 | (12AU6 / 12AU7) MINIAURE DOUBLE TRIODE |
| Shuguang Shuguang | 12AU7 | Compactron Tube |
Ei-RC |
12AU7 | Double Triode |
| ETC Unknown Manufacturer | 12AU7 | DOUBLE TRIODE 12- INDIRECTLY HEATED |
| ETC Unknown Manufacturer | 12AU6 | (12AU6 / 12AU7) MINIAURE DOUBLE TRIODE |
MAZDABELVU |
12AU7A | Double Triode |
RCA |
12AU7A | Twin Triode |
| BRIMAR BRIMAR | 12AU7 | Receiving Valve |