TT 12AX7 / ECC83 Classic

TT-Selection: Balanced Gain

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

Psvane 12AX7 / ECC83 preamp tube from the Classic series with red logo.
Dropin replacement for all 12AX7, ECC83 and 7025 tubes.

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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.

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

Psvane 12AX7 / ECC83 preamp tube from the Classic series with red logo.
Drop-in replacement for all 12AX7, ECC83 and 7025 tubes.
 

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TT Selection: Balanced
Both systems with balanced gain

Psvane 12AX7 / ECC83 preamp tube from the Classic series with red logo.
Drop-in replacement for all 12AX7, ECC83 and 7025 tubes.

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JJ EL84 #05 - Soft Plus

• Not so hot than the #06 selection but still nice punch
• Recommended for Fender Blues Junior and Pro Junior and similar amps.
• Price for one tube.

FAQ: If I order two or more of these tubes, are they all "the same"?
Yes, the tubes are all "matched" and selected for the in the description mentioned amplifier.
FAQ: Can I replace the tubes myself or are adjustments needed?
Adjustments are not possible on the listed amplifier (unless a bias potentiometer has been added afterwards). The replacement can therefore be done without adjustments.

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

Files:

• Datasheet

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

The 12AX7EH provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable NOS types.

Files:

• Datasheet

Sweet and warm sounding preamp tube with high gain. We recommend this tube for guitar/bass amps.

Files:

• Datasheet

Very linear working 12AX7 / ECC83 with long anode plates and spiral heating, which makes the tube less sensitive to interference from AC heating.
We recommend this tube for audio and high-end amps as well as for "modern" Fender amps with more overdrive, but also as an input tube in old Marshall JCM800s.

Note: Tubes equipped with long plates are commonly associated with a "warmer" or "richer" sound, whereas those with shorter plates tend to deliver a "tighter sound". However, tubes featuring long plates exhibit increased sensitivity to vibrations and mechanical disturbances, rendering them less ideal for critical applications.

Files

• Datasheet

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.

Vishay ORANGE DROP® 225P

• Type:  Polyester Film Capacitors
• Voltage Rating: 100 V
• Tolerance: - 10 % / +10 %
• Operating Temperature Range: - 55°C / + 85 °C
• Termination Style: radial

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

Outputtransformer for Dumble style projects with 6L6GC tubes

• Pri.: 5000 Ohm C.T.
• Sec.: 4-8-16 Ohm
• Power: 50 W (20Hz -3dB)

Files:

• Datasheet

Tube Shield Noval

• for noval sockets
• Color: silver
• High: 55 mm
• Including Base and Shield