Vacuum Tube - 12AX7WA, Sovtek

Vacuum Tube - 12AX7WA, Sovtek

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9 pin miniature preamp tube (Amplification Factor = 100). This Russian tube has strong lows and bright highs. Its lows demand attention when playing full bar chords. In overdrive, it offers a lot of crunchy fizz. For more information about our 12AX7 tubes, see our tech corner article on 12AX7s.

Item ID:
RoHS Compliant
Product Measurements by Type
Amplification Factor85 -110
Bulb Temperature95°C
Capacitance, Plate to Plate0.4 nF
Capacitance, Transfer0.55 nF
Capacitance, input2.15 nF
Capacitance, output1.9 nF
Cathode to Heater Voltage100 V
Grid Reverse Current0.2 μA
Heater Current305 / 153 mA
Heater Voltage6.0 - 6.6 V / 12.0 - 13.2 V
Plate Current (Ia)10 mA
Plate Dissipation, per triode (Wa)1.0 W
Plate Voltage (Ua)300 V
Transconductance (S)1.4 mA/V - 2.65 mA/V
Packaging Information
Packaging Dimensions1.1 in. × 1.1 in. × 3.1 in.
Weight (Packaging)0.036 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet532.23 KB

Questions and Answers

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Asked by Anonymous on March 21st, 2019.
March 21st, 2019
Staff Member
6.3V or 12.6V according to the data sheet above.
Asked by Anonymous on June 21st, 2020.
June 23rd, 2020
Staff Member
The suffixes at the end of different 12AX7 varieties only indicate subtle changes in specs or design. Using any 12AX7 or 12AX7 variant will be safe for your application, however, the sound for each may not be ideal. You can use our 12AX7 tube comparison chart to help you determine which 12AX7 is the best fit for your application.

Product Reviews

5.00 out of 5 based on 2 reviews
jdj5952 - November 21st, 2019
5 out of 5

Probably the most rugged current production 12AX7. This tube is my first choice for cathode follower positions in guitar amps. You just can't kill these things.

Richard Holland - August 15th, 2018
5 out of 5

These tubes are very close to the old GE version. I like switching pre-amp tubes on my tube amps and These work great. Also, I do trust Antique Electronic Sully. Good people.