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Sovtek 12AX7 / ECC83 WA - V1 - SPAX7 Replacement

TT Selection: V1 - Low Noise
This tube is selected for sensitive input stages (V1)
Drop in Replacement for Mesa SPAX7 12Ax7/ECC83

The Sovtek 12AX7WA is a defacto standard in 12AX7 tubes for many years yet because of its high dependability and its low noise floor.

Safety Information

Safety Information for Vacuum Tubes

For all electrical, electromechanical and mechanical components, the specifications and operating parameters arising from the respective type standard generally apply.
Further information, where available, can be found in the respective data sheets and product descriptions included with the product.

General Information

NOT SUITABLE FOR CHILDREN - choking hazard due to small parts
NOT SUITABLE FOR UNTRAINED PERSONS - danger to life due to high voltages
The safety and processing requirements applicable to the component must be observed
CE conformity applies only when installed professionally
Warranty becomes void in case of improper handling
The operator is responsible for proper installation
Local regulations and VDE provisions must be complied with
Never exceed the rated power
Never exceed the rated voltages and currents

Required Expertise

Use of measuring instruments (multimeter, oscilloscope) and evaluation of measurement results
Safe handling of high voltages (up to 500V and more)
Reading and understanding circuit diagrams
Selection of appropriate tools
Knowledge of electrical components and their characteristics
First-aid knowledge for electrical accidents
Knowledge of VDE regulations and safety requirements

Amplifier Tubes

Hazard due to high voltages
Hazard due to very high heat generation
Hazard due to glass breakage
Hazard due to UV radiation in case of defective tubes

Manufacturer

Herstellerinformationen | Manufacturer Information

New Sensor Corporation, 32-33 47th Avenue, Long Island City, NY 11101, USA

EU-Wirtschaftsakteur | EU Economic Operator
Tube-Town GmbH, Rumbergring 37, 66969 Lemberg, Germany, info@tube-town.de

Customer reviews

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Sommer Cable - SC-SPIRIT LLX LOW LOSS, Instrumenten cable - 5 Meter

Making the impossible come true… -

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.

Due to its low capacitance and its very special construction the SC-SPIRIT LLX "LOW LOSS" is one of the world’s ultra-low loss guitar cables.

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
High-quality patch cabling in the professional studio technology
High-end cable for the live DJ

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

14,90 €
2,98 € per m

EH 7025 (12AX7 / ECC83 HQ) - V1

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

Electro-Harmonix has released a low noise, low microphonic version of the 12AX7 that meets all specifications required for the tube to be designated 7025. The original 7025 tube was a 12AX7 that was tested and selected for the lowest noise and microphonics for use in the critical first preamp stages of amplifiers where noise and microphonics could be an issue. In order to ensure that the 7025 specification is consistently met, Electro-Harmonix has redesigned the structure of the 12AX7 and has implemented construction techniques to ensure the absolute lowest noise and microphonics possible. In all samples tested, noise and microphonics could not be detected.

The Electro-Harmonix 7025EH has a mid-range that gives clarity and definition to the sound and a smooth top end for warmth and balance. With these characteristics, along with the exceptionally low noise and low microphonics, the Electro-Harmonix 7025EH will work equally well in vintage and modern high-gain guitar amplifiers, as well as sensitive phono preamps.

24,80 €

Sommer Cable - SC-SPIRIT BLACK ZILK, Instrument cable - 5 Meter

SC-SPIRIT BLACK ZILK

Self-respecting musicians...
rock with one of the most interesting guitar cables ever made. This soft, highly flexible guitar cable
with its very attractive finish stands out by outward and inner values. It is sheathed by a thick 7.2 mm jacket
in a velvety, semi-transparent BLACK ZILK jacket, which glides on the the floor as lightly as a feather.
We use concentrically stranded litz wires of oxygen.free class Nò Cile copper (OFC 99.9999%) and a GAS-
INJECTED PE insulation which ensures a low-loss, neutral transmission.

The stranding angle of the shielding screen has been chosen with care so that hardly any friction points
will ocour at the overlying sleeve protection of the connector, giving the cable an extra long life.

With DIY configuring please bear in mind that the black carbon screen(on the white insulation) is conductive
and must therefore be removed to avoid any earthing contact with the inner conductor.

PRODUCT ADVANTAGES:

Semi-transparent soft jacket design ensures a high number of bending cycles
Gorgeous velvet look with soft touch feeling
Dual shielding by flat helical Cu mesh and carbon semiconductor
High bending cycles
Zero-twist winding

APPLICATION:

High-end guitar cable for pure transmission even over longer distances
perfect for the unbalanced studio cabling

TECHNICAL DATA:

Construction LI2Y(LS)DY 1x0,25mm²
Jacket, diameter PVC 7,2 mm
AWG 24
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

12,20 €
2,44 € per Piece

Sommer Cable SC-THE SPIRIT XXL, black transparent - 3 Meter

This high end guitar cable is one of the most successful products of the past years and enjoys cult status with guitarists and bassists alike. Because of the excellent price-performance ratio, German and international trade press elected the SC-SPIRIT XXL test champion several times in a row.
The cable is robust and yet flexible, while its smoke-coloured jacket gives it a high recall value.
The shielding is ideal: The braiding is 95 % opaque and provides optical protection of 100 %, for even more safety.
A special lacquering makes the complex foamed polyethylene insulation very endurable and helps protect the excellent transmission properties for years to come.
The wire diameter of 0.75 mm² limits the loss typical for long distance guitar cables. There is hardly a guitar cable at a length of 10 m that sounds as good as the SC-SPIRIT XXL.
The customers consider the sound of the SC-SPIRIT XXL to be crystal-clear, clean and very neutral. It reproduces the impulsiveness of bass attacks exquisitely.
Caution: The black carbon shield between the braided shielding and the insulation is highly conductive. It must be removed before soldering to avoid short circuiting!

THE APPLICATION:

Enormously powerful and clear sound image for bass, guitar and keyboard
Double shielding due to the combination of copper braided shield and conductive carbon shielding
Transmission free of losses due to low capacity and large wire diameter
Very flexible and easy to wind due to the use of fine individual stranding
Durability and robustness due to a special high quality PVC-mixture for the jacket
High quality guitar and bass cable for studio and stage
Unbalanced cable for keyboards, samplers, mixing boards, etc.
Connection of stereo video recorder and DAT-recorder

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

12,95 €
4,32 € per m

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.

24,95 €