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JJ 12AX7 / ECC83S

Description

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

Files:

Datasheet

Manufacturer

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

Customer reviews (12)

Essential information about customer reviews We do not verify that the published reviews come from such consumers who have actually used or purchased the rated goods or services. All reviews, i.e. positive and negative, are published. No reviews that are unobjective, offensive or unrelated to the product will be published.

Lars K., 08/27/2019

I put these in the V2 and V3 positions of a VOXAC15C1. They sound good. For the V1 use either a 'V1' rated JJECC83S or a Tung Sol Reissue. Both sound good with the Tung Sol offering a bit more clarity and gain. good with the Tung Sol offering a bit more clarity and gain.
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Corrado, 03/02/2010

I have put it in v2,v3,v4 position of my Peavey Ultra Plus following the suggestion of TT. I don't have a lot of experience about tubes but the clean is still sparkly and I don't notify any noise.I've replaced a Sovtek 12ax7 whit this. The crunch and ultra channel aren't noisy also. I'm satisfied and my wallet also! is still sparkly and I don't notify any noise.I've replaced a Sovtek 12ax7 whit this. The crunch and ultra channel aren't noisy also. I'm satisfied and my wallet also!
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when dealing with a new guitar cable, this involves creating an extremely low capacitance together with a breathtaking flexibility. Developing an insulation which ensures super low values by means of a gas-injected foaming – this is not an easy job, but well within the bounds of possibility for a professional cable maker. However, protecting this fragile insulation also against motion, creasing or twisting, is indeed a true challenge.

With the SC-SPIRIT LLX "LOW LOSS" we have fallen back on the same insulation design as it is used in professional HD-SD video cables. For extra stability of the inner construction we use an optimised concentrical litz stranding and a special insulation curing on the surface. For the outer jacket we have applied a rubberlike soft PVC jacket, which is highly flexible, extremely compact, stretches hardly and protects the whole inner structure from exterior influences.

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With DIY assembly please watch out that the black carbon screen (sitting on the white insulation) is conductive and must therefore be removed to avoid ground contact with the inner conductor.

ADVANTAGES:

Extremely low capacitance values
Robust, twist-proof and easy to reel
Low-loss, detailed and neutral transmission properties
Double shielding by Cu mesh plus conductive carbon screen

APPLICATION:

Highly flexible cable for the demanding studio and live guitarist
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TECHNICAL DATA

Construction LI2Y(LS)CY 1x0,38mm²
Jacket, Diameter PVC 7,5 mm
AWG 21
Inner Conductors 1 x 0,28 mm²
Copper strand per Conductor 19 x 0,16 mm
Conductor insulation Foam/skin-PVC
Shielding Copper braiding tin-plated + Semiconductor
Shielding factor 100 %
Temperature range min. -30 °C
Temperature range max. 70 °C
Fire load per m 0,26 kWh
Color black

ELECTRICAL DATA

Capac. cond./shield. per 1 m 52 pF
Cond. resistance per 1 km 48 Ohm
Insulation resistance per 1 km 1 GOhm

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EH 7025 (12AX7 / ECC83 HQ) - V1

TT Selection: V1 - Low Noise
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PRODUCT ADVANTAGES:

Semi-transparent soft jacket design ensures a high number of bending cycles
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APPLICATION:

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TECHNICAL DATA:

Construction LI2Y(LS)DY 1x0,25mm²
Jacket, diameter PVC 7,2 mm
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Inner conductors 1 x 0,25 mm²
Copper strand per conductor 32 x 0,10 mm
Conductor insulation Foam/skin-PE
Shielding helical Cu screen + semiconuctor
Shielding factor 100 %
Temperature range min. -30 °C
Temperature range max. 70 °C
Fire load per m 0,26 kWh
Weight per 1 m 64 g

ELECTRICAL DATA:

Capac. cond./shield. per 1 m 80 pF
Cond. resistance per 1 km 90 Ohm
Insulation resist. per 1 km > 1 GOhm

Unit: Price per 1 meter

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THE APPLICATION:

Enormously powerful and clear sound image for bass, guitar and keyboard
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TECHNICAL DATA:

Construction LI2Y(LS)CY 1x0,75mm²
Jacket, diameter PVC 6,8 mm
AWG 18
Inner conductors 1 x 0,75 mm²
Copper strand per conductor 42 x 0,15 mm
Conductor insulation Foam/skin-PE 3,1 mm
Shielding copper spiral tin-plated + semiconductor
Shielding factor 100 %
Temperature range min. -30 °C
Temperature range max. 70 °C
Fire load per m 0,26 kWh
Weight per 1 m 52 g
Color black transparent

ELECTRICAL DATA:

Capac. cond./shield. per 1 m 86 pF
Cond. resistance per 1 km 25 Ohm
Insulation resist. per 1 km > 50 MOhm

Unit: Price per 1 meter

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TT 12AX7 / ECC83 Classic V1

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

The TT12AX7 impresses with its fine and detailed reproduction of the highs, which is maintained even at high amplification levels. Due to a higher H3 part, the TT12AX7 sounds significantly cleaner than many other 12AX7/ECC83 tubes, which makes the bass range appear much tighter. We therefore especially recommend this tube for styles such as clean, crunch, and metal, where high amplification and clear transparency are required.

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 voltages (Ug1): -2V (typical)
Grid voltages: -50V to 0V
Anode current (Ia): 1.2mA (typical)
Anode power dissipation: Maximum 1W per triode
Anode resistance (ra): 62.5kΩ
Amplification factor (μ): 100
Transconductance (S): 1.6mA/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 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 functionality.
Coupling capacitors: Capacitors with low capacitance (typically 0.1µF) are recommended to minimize high-frequency interference.

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