JJ 12AX7 / ECC83S Balanced
JJ 12AX7 / ECC83S Balanced

JJ 12AX7 / ECC83S Balanced

Product No.:
jj12ax7-b
In stock for immediate delivery. Delivery time depends on the destination country* In stock for immediate delivery. Delivery time depends on the destination country*
RoHs:
conform
Weight:
0.014 kg per piece
21,90 €

incl. VAT excl. Shipping costs

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JJ 12AU7 / ECC82
ECC82 / 12AU7 medium gain pre-amplifying double triode.
Provides a very smooth sound with well-defined tones suitable for audio and guitar amplifiers.

Files:
14,20 €

TT 12AU7 / ECC82
With a soft and detailed sound, as well as sufficient headroom, the TT 12AU7/ECC82 enhances the sound characteristics of any amplifier, whether it's for guitar, bass, or high-end. These tubes deliver a dynamic range, captivating listeners and musician with uncompromising clean sounds and rich overdrive.

Features:
  • Detailed sound
  • Ideal for both low and high gain amplifiers
Tip:
Often, 12AU7 and 12AT7 types are used instead of 12AX7 tubes to either reduce the overall power of the amplifier or to just reduce the overloading of the preamp. In comparison to a 12AX7, the 12AU7 brings about a very large sonic difference, typically much greater than switching from 12AX7 to 5751 or 12AT7.

When using a 12AU7 in a driver stage normally designed for 12AX7, the overall power of the power stage is usually reduced. The extent of this difference depends on the amplifier or circuit. For example, a Marshall amplifier with a 12AX7 in the PI stage set at volume 5 will then reach the same volume level with a 12AU7 at volume 6 (perceived volume, not measured).

Electrical Properties

  • Heater Voltage (Uf): 6.3V or 12.6V
  • Heater Current (If): 300mA at 6.3V, 150mA at 12.6V
  • Anode Voltage (Ua): Maximum 300V
  • Grid Voltage (Ug1): -8.5V (typical)
  • Anode Current (Ia): 10.5mA (typical)
  • Anode Dissipation: Maximum 2.75W per triode
  • Anode Resistance (ra): 7.7kΩ
  • Amplification Factor (μ): 17
  • Transconductance (S): 2.2mA/V
  • Input Capacitance (Cin): 1.6pF
  • Output Capacitance (Cout): 1.6pF

Mechanical Properties

  • Socket: B9A (Noval)
  • Number of Pins: 9

Pin Configuration

  • 1 Anode (Triode 1)
  • 2 Grid (Triode 1)
  • 3 Cathode (Triode 1)
  • 4 Heater (f)
  • 5 Heater (f)
  • 6 Anode (Triode 2)
  • 7 Grid (Triode 2)
  • 8 Cathode (Triode 2)
  • 9 Center Heater (f)

Application Notes

  • Heater Operation: The tube can be operated at 6.3V or 12.6V, depending on the circuit design.
  • Grid Resistors: It is recommended to use grid resistors of at least 1MΩ to ensure stable operation.
  • Coupling Capacitors: Capacitors with low capacitance (typically 0.1µF) are recommended to minimize high-frequency interference.
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JJ 12AT7 / ECC81 V1

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

JJ's version of the ECC81/12AT7 tube type with a warm and soft sound. Often used for phase inverters or reverb drivers.

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TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

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TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)

The Ultimate 12AX7. Big, warm, and musical. High Gain, ultra-low microphonics, and superb linearity with a dynamic 3-D sound.

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  • Tolerance: - 20 % / +20 %
  • Operating Temperature Range: - 40°C / + 85 °C
  • Dimensions: Ø 5 mm x 11 mm
  • Termination Style: radial
  • Grid: 2,0

Images are for reference only. See Product Specifications

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Elektrolyt 100 µF @ 100V
  • Type: Electrolytic can capacitor
  • Capacitance: 100 µF
  • Voltage Rating: 100 V
  • Tolerance: - 20 % / +20 %
  • Operating Temperature Range: - 40°C / + 105 °C
  • Dimensions: Ø 12,5 mm x 21 mm
  • Termination Style: radial
  • Grid: 5,0

Images are for reference only. See Product Specifications

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  • Capacitance: 220 µF
  • Voltage Rating: 100 V
  • Tolerance: - 10%+30%
  • Operating Temperature Range: - 40°C / + 85 °C
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F+T 100 µF @ 350 Volt, axial
  • Type: Aluminum Electrolytic Capacitors
  • Capacitance: 100 µF
  • Voltage Rating: 350 V
  • Tolerance: +/- 20%
  • Operating Temperature Range: - 40°C / + 85 °C
  • Dimensions: Ø 18 mm x 37 mm
  • Termination Style: axial
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DOUBLE ANODE RECTIFYING TUBE
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