Vacuum Tube - 12AU7A / ECC82, Electro-Harmonix

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Pictured: Regular
Pictured: Gold
Pictured: Gold
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Vacuum Tube - 12AU7A / ECC82, Electro-Harmonix

Starting at: $13.95
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Superior medium-Mu Twin Triode for use in preamplifier and driver circuits. Standard replacement for all circuits requiring 12AU7/ECC82 types.

  • Low microphonics, high linearity
  • Reproduction of the NOS GE 6189
  • ECC82 equivalent
Item ID:
Part Numbers
Pin TypeOur Part NumberUPC/EAN
Product Measurements
Amplification Factor15 min, 17 nominal
Capacitance, Cathode to Heater5.0 nF
Capacitance, Grid to Cathode and Heater2.0 pF
Capacitance, Plate to Cathode and Heater1.5 pF
Capacitance, Plate to Plate500 pF
Capacitance, grid to plate1.8 pF
Grid Circuit Resistance (Rg), Fixed Bias1 MΩ
Grid Circuit Resistance (Rg), Self Bias2.2 MΩ
Grid Reverse Current0.5 μA
Heater Current0.3 A / 0.15 A
Heater Voltage6.0 - 6.6 V / 12.0 - 13.2 V
Heater Warmup Time12 s
Heater to Cathode Voltage, Negative200 V
Heater to Cathode Voltage, Positive100 V
Plate Current (Ia)22 mA
Plate Dissipation, per triode (Wa)2.75 W
Plate Resistance (Ra)7.5 kΩ
Plate Voltage (Ua)330 V
Transconductance (S)2.2 mA/V
Packaging Information
Packaging DimensionsGold version2.75 in. × 1 in. × 1 in.
Regular version1 in. × 1 in. × 3 in.
Weight (Packaging)Gold version0.035 lbs.
Regular version0.038 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet745.24 KB

Questions and Answers

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Asked by Mike Dykes on February 20th, 2018. 1 person subscribed to this question
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February 23rd, 2018
These are not balanced and we recommend the TAD 12AU7 as they are balanced. Do a search for SKU: T-12AU7A-TAD.
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