To date, there are 5 manufacturers of the 12AX7 Vacuum Tube, in the list we have provided a Datasheet from each in PDF format. You can download by clicking on the PDF icon.
The most common of them are General Electric Company, Electronic tubes factory, Svetlana, RFT, Shuguang.
| Manufacturers | Names | |
|---|---|---|
 | GEC [General Electric Company] |  |
 | Ei-RC [Electronic tubes factory] | |
 | Svetlana | |
 | RFT | |
| Shuguang | | |
| Marconi | | |
| BRIMAR | | |
| ETC2 [List of Unclassifed Manufacturers] | |
Absolute maximum ratings 12AX7 (Ta = 25oC unless specified otherwise):
- Plate Voltage – 300 Volts
- Positive DC Grid Voltage – 0 Volts
- Negative DC Grid Voltage – 50 Volts
- Plate Dissipation – 1.0 Watts
- Heater-Cathode Voltage:
- Heater Positive with Respect to Cathode – 180 Volts
- Heater Negative with Respect to Cathode – 180 Volts
In the datasheet for the 12AX7 Vacuum Tube you will find technical specifications, a complementary pair and all possible replacements.