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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:

Datasheet

Manufacturer

Herstellerinformationen | Manufacturer Information
JJ Electronic
A. Hlinku 3
022 01 ČADCA
Slowakische Republik
www.jj-electronic.com

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TT 12AT7 / ECC81

Warm and balanced overall sound, paired with high resolution and brilliance, which is why the TT12AT7 achieves the best results in both instrumental and audio/high-end amplifiers.

Features:

Warm and balanced sound
Excellent sound resolution and brilliance
Ideal for instrumental and audio/high-end amplifiers

Hint;
Often, 12AU7 and 12AT7 types are used instead of 12AX7 tubes in order to either reduce the overall power of the amplifier or just take back the overdrive of the preamp. Especially the 12AU7 brings a very large tonal difference compared to a 12AX7, which is usually much greater than when switching from a 12AX7 to 5751 or 12AT7.

When using a 12AU7 in a driver stage that is normally designed for 12AX7, the overall power of the power amp is usually reduced. How big this difference is depends on the amplifier or circuit. For example, a Marshall with a 12AX7 in the phase inverter stage set to volume 5 will then reach the same volume with a 12AU7 set to volume 6 (perceived volume, not measured).

Electrical Characteristics

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): -2V (typical)
Anode Current (Ia): 10mA (typical)
Anode Power Dissipation: Maximum 2.5W per triode
Anode Resistance (ra): 11kΩ
Amplification Factor (μ): 60
Transconductance (S): 5.5mA/V
Input Capacitance (Cin): 1.6pF
Output Capacitance (Cout): 1.6pF

Mechanical Characteristics

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 with either 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 disturbances.

14,20 €

Mallory 150's 0,047 µF / 250 V DC

Mallory Type 150 is a general purpose capacitor for use in blocking, bypass, decoupling, smoothing and some timing applications.

Epoxy end fill meets UL94V-0
Non inductively wound
Flame retardant outer wrap meets UL510
Non polar

Specifications:

Operating Tempeature Range: –55 ºC to +125 ºC (derate linearly to 50% rated voltage at 125 ºC)
Dielectric Withstand Voltage: .6 x rated voltage for 2 s @ +25 ºC ±5 ºC
Dissipation Factor (DF): tgd x 10–4 at +25 ºC ±5 ºC
Insulation Resistance: 10,000 MO x µF, 30,000 MO Min.
Self Inductance: 1 nH max. per 1 mm lead and body length
Life Test: 1000 hrs @ 85 ºC 1.25 x Vn
Damp Heat Test: 95% RH @ +45 ºC for 21 days
Soldering: 260 ºC ±5 ºC for 10 s ±1 s
Long Term Storage Stability: ?C/C = ±3% after 2 years