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