Vacuum Tube - 12AX7 / ECC83, Electro-Harmonix

Name: Vacuum Tube - 12AX7 / ECC83, Electro-Harmonix
Brand: Electro-Harmonix
SKU: T-12AX7EH
Availability: InStock

Pictured: Regular

Pictured: Gold

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In Stock

This Russian tube is full bodied and bright with a more straightforward presentation. It packs a lot of bite with its higher-than-normal gain. In overdrive, it offers a lot of crunchy fizz. High gain preamplifier tube with ultra low noise and detailed, musical tone. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments.

Superior high gain short plate format Twin Triode, with ultra-low noise and detailed, musical tone.

Ultra-low noise thanks to unique spiral filament which eliminates cathode-to-filament induced hum on certain amps
ECC83/7025 equivalent

For more information about our 12AX7 tubes, see our tech corner article on 12AX7s.

SKU:

T-12AX7EH

Item ID:

004458

Brand:

Electro-Harmonix

Type:

Gold Pin, Preamplifier

Accessory Items:

Damper Rings - High Temperature Silicone, Red

Part Numbers
Pin Type	Our Part Number	UPC/EAN
Regular	T-12AX7EH	683274020099
Gold	T-12AX7-GOLD-EH	841358101762

Measurements by Type
Measurements by Item

Product Measurements by Type
Amplification Factor		78 min, 92 nominal
Capacitance, Cathode to Heater		5.0 nF
Capacitance, Grid to Cathode		1.6 pF
Capacitance, Grid to Heater		1.6 pF
Capacitance, Plate to Cathode		0.44 pF / 0.36 pF
Capacitance, Plate to Heater		0.44 pF / 0.36 pF
Capacitance, Plate to Plate		520 pF
Capacitance, grid to plate		1.6 pF
Grid Circuit Resistance (R_g), Fixed Bias		1 MΩ
Grid Circuit Resistance (R_g), Self Bias		2.2 MΩ
Grid Reverse Current		0.2 μA
Heater Voltage		6.0 - 6.6 V / 12.0 - 13.2 V
Heater to Cathode Voltage, Negative		200 V
Heater to Cathode Voltage, Positive		100 V
Plate Current (I_a)		9 mA
Plate Dissipation, per triode (W_a)		1.0 W
Plate Resistance (R_a)		54.1 kΩ
Plate Voltage (U_a)		300 V
Transconductance (S)		≥ 1.4 mA/V, 1.7 mA/V nominal

Packaging Information
Packaging Dimensions	Gold version	T-12AX7-GOLD-EH	2.75 in. × 1 in. × 1 in.
Packaging Dimensions	Regular version	T-12AX7EH	1.1 in. × 1.1 in. × 3.1 in.
Weight (Packaging)	Gold version	T-12AX7-GOLD-EH	0.0309 lbs.
Weight (Packaging)	Regular version	T-12AX7EH	0.038 lbs.

Product Measurements by Item
T-12AX7-GOLD-EH - Gold version	Amplification Factor	78 min, 92 nominal
	Capacitance, Cathode to Heater	5.0 nF
	Capacitance, Grid to Cathode	1.6 pF
	Capacitance, Grid to Heater	1.6 pF
	Capacitance, Plate to Cathode	0.44 pF / 0.36 pF
	Capacitance, Plate to Heater	0.44 pF / 0.36 pF
	Capacitance, Plate to Plate	520 pF
	Capacitance, grid to plate	1.6 pF
	Grid Circuit Resistance (R_g), Fixed Bias	1 MΩ
	Grid Circuit Resistance (R_g), Self Bias	2.2 MΩ
	Grid Reverse Current	0.2 μA
	Heater Voltage	6.0 - 6.6 V / 12.0 - 13.2 V
	Heater to Cathode Voltage, Negative	200 V
	Heater to Cathode Voltage, Positive	100 V
	Plate Current (I_a)	9 mA
	Plate Dissipation, per triode (W_a)	1.0 W
	Plate Resistance (R_a)	54.1 kΩ
	Plate Voltage (U_a)	300 V
	Transconductance (S)	≥ 1.4 mA/V, 1.7 mA/V nominal
T-12AX7EH - Regular version	Amplification Factor	78 min, 92 nominal
	Capacitance, Cathode to Heater	5.0 nF
	Capacitance, Grid to Cathode	1.6 pF
	Capacitance, Grid to Heater	1.6 pF
	Capacitance, Plate to Cathode	0.44 pF / 0.36 pF
	Capacitance, Plate to Heater	0.44 pF / 0.36 pF
	Capacitance, Plate to Plate	520 pF
	Capacitance, grid to plate	1.6 pF
	Grid Circuit Resistance (R_g), Fixed Bias	1 MΩ
	Grid Circuit Resistance (R_g), Self Bias	2.2 MΩ
	Grid Reverse Current	0.2 μA
	Heater Voltage	6.0 - 6.6 V / 12.0 - 13.2 V
	Heater to Cathode Voltage, Negative	200 V
	Heater to Cathode Voltage, Positive	100 V
	Plate Current (I_a)	9 mA
	Plate Dissipation, per triode (W_a)	1.0 W
	Plate Resistance (R_a)	54.1 kΩ
	Plate Voltage (U_a)	300 V
	Transconductance (S)	≥ 1.4 mA/V, 1.7 mA/V nominal

Specification Sheet	All Models

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Specification Sheet

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Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.