Sovtek

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

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

TT Selection: Balanced
Both systems with balanced gain

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

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

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

The Sovtek 12AX7WB has more gain and saturation than the Sovtek 12AX7WA. Its warmer, darker sound is preferred by Rivera, VHT, Demeter, and Kendrick, among other manufacturers.

TT Selection: Balanced
Both systems with balanced gain

The Sovtek 12AX7WB has more gain and saturation than the Sovtek 12AX7WA. Its warmer, darker sound is preferred by Rivera, VHT, Demeter, and Kendrick, among other manufacturers.

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

The Sovtek 12AX7WB has more gain and saturation than the Sovtek 12AX7WA. Its warmer, darker sound is preferred by Rivera, VHT, Demeter, and Kendrick, among other manufacturers.

The Sovtek 12AX7WC has a little bit more gain than the Sovtek 12AX7WB and  the 12AX7WA. The noise floor is still pretty low compared with other 12AX7 tubes and the dependabiliyt very high.

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

The Sovtek 12AX7WC has a little bit more gain than the Sovtek 12AX7WB and  the 12AX7WA. The noise floor is still pretty low compared with other 12AX7 tubes and the dependabiliyt very high.

Sovtek tubes are quite simply the absolute best. We design and manufacture our tubes, engineered for demanding high fidelity, reliability and overall warmth. Be sure to insist on genuine Sovtek vacuum tubes the next time you retube -- you'll be getting the absolute best possible tubes for any demanding application.

2 tubes, matched as pair

The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design. Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs.

4 tubes, matched as quad

The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design. Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs.

Single tube, not matched

The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design. Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs.

Rectifier

Rectifier
An indirectly heated diode intended for rectification of commercial-frequency alternating current. It has a 140 mA maximum output and filament voltage of 5 V and a filament current of 2 A +/- 0.2 A.

Files:

• Datasheet

2 tubes, matched as pair

Military version of the EL84 / 6BQ5 with extended voltage tolerance, as well as a more robust construction and improved anode cooling. 
We highly recommend this EL84 for amplifiers where the anode voltage significantly exceeds 300 V.

4 tubes, matched as quad

Military version of the EL84 / 6BQ5 with extended voltage tolerance, as well as a more robust construction and improved anode cooling. 
We highly recommend this EL84 for amplifiers where the anode voltage significantly exceeds 300 V.

Single tube, not matched

Military version of the EL84 / 6BQ5 with extended voltage tolerance, as well as a more robust construction and improved anode cooling. 
We highly recommend this EL84 for amplifiers where the anode voltage significantly exceeds 300 V.

Sovtek 6C45-Pi

Sovtek 6L6 WXT+ / STR430 - #16 - Mesa RED

• Corresponds to Mesa Color Code RED
• Price for one tube.

FAQ: If I order two or more of these tubes, are they all "matched"?
Yes, the tubes are all "matched" and selected for the above amplifiers.

FAQ: Can I change the tubes myself or does anything need to be adjusted?
Adjustment work is not possible on the above amplifiers (unless a bias adjustment has been retrofitted). The exchange can therefore be done without any adjustment or measurement work.

Sovtek 6L6 WXT+ / STR430 - #19 - Mesa GRAY

• Corresponds to Mesa Color Code GRAY
• Price for one tube.

FAQ: If I order two or more of these tubes, are they all "matched"?
Yes, the tubes are all "matched" and selected for the above amplifiers.

FAQ: Can I change the tubes myself or does anything need to be adjusted?
Adjustment work is not possible on the above amplifiers (unless a bias adjustment has been retrofitted). The exchange can therefore be done without any adjustment or measurement work.

2 tubes, matched as pair

The 6L6WXT+ features larger plate dimensions and 20 percent higher output than the Sovtek 5881WXT. Extremely low noise and a excellent detailed and harmonic sound, plenty of power and very easy to handle - even while using in "hot" setups.