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Vacuum Tube - 12AU7A / ECC82, Electro-Harmonix

Starting at: $12^.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

SKU:

T-12AU7A-EH

Item ID:

004438

Brand:

Electro-Harmonix

Type:

Gold Pin, Preamplifier

Part Numbers
Pin Type	Our Part Number	UPC/EAN
Regular	T-12AU7A-EH	683274021652
Gold	T-12AU7-GOLD-EH	841358101724

Measurements by Type
Measurements by Item

Product Measurements by Type
Amplification Factor		15 min, 17 nominal
Capacitance, Cathode to Heater		5.0 nF
Capacitance, Grid to Cathode and Heater		2.0 pF
Capacitance, Plate to Cathode and Heater		1.5 pF
Capacitance, Plate to Plate		500 pF
Capacitance, grid to plate		1.8 pF
Grid Circuit Resistance (R_g), Fixed Bias		1 MΩ
Grid Circuit Resistance (R_g), Self Bias		2.2 MΩ
Grid Reverse Current		0.5 μA
Heater Current		0.3 A / 0.15 A
Heater Voltage		6.0 - 6.6 V / 12.0 - 13.2 V
Heater Warmup Time		12 s
Heater to Cathode Voltage, Negative		200 V
Heater to Cathode Voltage, Positive		100 V
Plate Current (I_a)		22 mA
Plate Dissipation, per triode (W_a)		2.75 W
Plate Resistance (R_a)		7.5 kΩ
Plate Voltage (U_a)		330 V
Transconductance (S)		2.2 mA/V

Packaging Information
Packaging Dimensions	Gold version	T-12AU7-GOLD-EH	2.75 in. × 1 in. × 1 in.
Packaging Dimensions	Regular version	T-12AU7A-EH	1 in. × 1 in. × 3 in.
Weight (Packaging)	Gold version	T-12AU7-GOLD-EH	0.035 lbs.
Weight (Packaging)	Regular version	T-12AU7A-EH	0.038 lbs.

Product Measurements by Item
T-12AU7-GOLD-EH - Gold version	Amplification Factor	15 min, 17 nominal
	Capacitance, Cathode to Heater	5.0 nF
	Capacitance, Grid to Cathode and Heater	2.0 pF
	Capacitance, Plate to Cathode and Heater	1.5 pF
	Capacitance, Plate to Plate	500 pF
	Capacitance, grid to plate	1.8 pF
	Grid Circuit Resistance (R_g), Fixed Bias	1 MΩ
	Grid Circuit Resistance (R_g), Self Bias	2.2 MΩ
	Grid Reverse Current	0.5 μA
	Heater Current	0.3 A / 0.15 A
	Heater Voltage	6.0 - 6.6 V / 12.0 - 13.2 V
	Heater Warmup Time	12 s
	Heater to Cathode Voltage, Negative	200 V
	Heater to Cathode Voltage, Positive	100 V
	Plate Current (I_a)	22 mA
	Plate Dissipation, per triode (W_a)	2.75 W
	Plate Resistance (R_a)	7.5 kΩ
	Plate Voltage (U_a)	330 V
	Transconductance (S)	2.2 mA/V
T-12AU7A-EH - Regular version	Amplification Factor	15 min, 17 nominal
	Capacitance, Cathode to Heater	5.0 nF
	Capacitance, Grid to Cathode and Heater	2.0 pF
	Capacitance, Plate to Cathode and Heater	1.5 pF
	Capacitance, Plate to Plate	500 pF
	Capacitance, grid to plate	1.8 pF
	Grid Circuit Resistance (R_g), Fixed Bias	1 MΩ
	Grid Circuit Resistance (R_g), Self Bias	2.2 MΩ
	Grid Reverse Current	0.5 μA
	Heater Current	0.3 A / 0.15 A
	Heater Voltage	6.0 - 6.6 V / 12.0 - 13.2 V
	Heater Warmup Time	12 s
	Heater to Cathode Voltage, Negative	200 V
	Heater to Cathode Voltage, Positive	100 V
	Plate Current (I_a)	22 mA
	Plate Dissipation, per triode (W_a)	2.75 W
	Plate Resistance (R_a)	7.5 kΩ
	Plate Voltage (U_a)	330 V
	Transconductance (S)	2.2 mA/V

Specification Sheet	All Models

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Specifications, Files, and Documents

Specification Sheet

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Questions and Answers

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1 answers Is this a balanced 12AU7? Dual symmetrical triodes?

Asked by Mike Dykes on February 20th, 2018.

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Matt H

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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