| Manufacturer | Part Number | Description |
|---|---|---|
Ei-RC |
12AX7 | Double Triode |
GE |
12AX7 | Twin Triode |
RCA |
12AX7A | Twin Triode |
| Shuguang Shuguang | 12AX7B | Compactron Tube |
| Marconi Marconi | 12AX7 | Double Triode |
| Shuguang Shuguang | 12AX7 | Compactron Tube |
RFT |
12AX7 | Doppeltriode |
MAZDABELVU |
12AX7A | Double Triode |
Svetlana |
12AX7 | High-Mu Twin Audio Triode |
| BRIMAR BRIMAR | 12AX7 | Receiving Valve |