Vacuum Tube - 5881WXT, Sovtek
The Sovtek 5881WXT is the same as the 5881 but with a full size base for easy installation in vintage amp designs. The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design.
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. Extremely consistent from piece to piece.
The Sovtek 5881 has a heater voltage of 6.3 volts at 0.88 amperes.
Matched versions of this tube use Apex Matching
RoHS Compliant
Accessory Items:
Single or Matched | Our Part Number | UPC/EAN |
---|---|---|
Apex Matched Pair | T-5881WXT-SV-MP | 609722124041 |
Apex Matched Quad | T-5881WXT-SV-MQ | 609722124058 |
Single | T-5881WXT-SOVT | 683274021324 |
Capacitance, Cathode to Heater | 11 pF | ||
Capacitance, Transfer | 1.0 pF | ||
Capacitance, input | 11 pF | ||
Capacitance, output | 6.7 pF | ||
Cathode to Heater Insulation Resistance | 4 MΩ | ||
Filament Current (If) | 840 - 920 mA | ||
Grid 1 Insulation Resistance | 200 MΩ | ||
Grid 1 Inverse Current | 0.5 mA | ||
Grid 2 Current | 6 mA | ||
Height, base to top | 3.5 in. | ||
Internal Resistance (Ri) | 18 kΩ - 75 kΩ | ||
Non-linear Harmonic Distortion | 15 % | ||
Output Power (POut) | 5.8 W | ||
Plate Current (Ia) | 60 mA - 86 mA | ||
Readiness Time | 50 s | ||
Transconductance (S) | 5.2 mA/V - 6.8 mA/V |
Packaging Dimensions | Apex Matched Pair version | T-5881WXT-SV-MP | 5.1 in. × 3.5 in. × 1.8 in. |
Apex Matched Quad version | T-5881WXT-SV-MQ | 5.1 in. × 3.5 in. × 3.5 in. | |
Single version | T-5881WXT-SOVT | 1.5 in. × 1.5 in. × 4 in. | |
Weight (Packaging) | Apex Matched Pair version | T-5881WXT-SV-MP | 0.2866 lbs. |
Apex Matched Quad version | T-5881WXT-SV-MQ | 0.5732 lbs. | |
Single version | T-5881WXT-SOVT | 0.1433 lbs. |
T-5881WXT-SOVT - Single version | Capacitance, Cathode to Heater | 11 pF |
Capacitance, Transfer | 1.0 pF | |
Capacitance, input | 11 pF | |
Capacitance, output | 6.7 pF | |
Cathode to Heater Insulation Resistance | 4 MΩ | |
Filament Current (If) | 840 - 920 mA | |
Grid 1 Insulation Resistance | 200 MΩ | |
Grid 1 Inverse Current | 0.5 mA | |
Grid 2 Current | 6 mA | |
Height, base to top | 3.5 in. | |
Internal Resistance (Ri) | 18 kΩ - 75 kΩ | |
Non-linear Harmonic Distortion | 15 % | |
Output Power (POut) | 5.8 W | |
Plate Current (Ia) | 60 mA - 86 mA | |
Readiness Time | 50 s | |
Transconductance (S) | 5.2 mA/V - 6.8 mA/V | |
T-5881WXT-SV-MP - Apex Matched Pair version | Capacitance, Cathode to Heater | 11 pF |
Capacitance, Transfer | 1.0 pF | |
Capacitance, input | 11 pF | |
Capacitance, output | 6.7 pF | |
Cathode to Heater Insulation Resistance | 4 MΩ | |
Filament Current (If) | 840 - 920 mA | |
Grid 1 Insulation Resistance | 200 MΩ | |
Grid 1 Inverse Current | 0.5 mA | |
Grid 2 Current | 6 mA | |
Height, base to top | 3.5 in. | |
Internal Resistance (Ri) | 18 kΩ - 75 kΩ | |
Non-linear Harmonic Distortion | 15 % | |
Output Power (POut) | 5.8 W | |
Plate Current (Ia) | 60 mA - 86 mA | |
Readiness Time | 50 s | |
Transconductance (S) | 5.2 mA/V - 6.8 mA/V | |
T-5881WXT-SV-MQ - Apex Matched Quad version | Capacitance, Cathode to Heater | 11 pF |
Capacitance, Transfer | 1.0 pF | |
Capacitance, input | 11 pF | |
Capacitance, output | 6.7 pF | |
Cathode to Heater Insulation Resistance | 4 MΩ | |
Filament Current (If) | 840 - 920 mA | |
Grid 1 Insulation Resistance | 200 MΩ | |
Grid 1 Inverse Current | 0.5 mA | |
Grid 2 Current | 6 mA | |
Height, base to top | 3.5 in. | |
Internal Resistance (Ri) | 18 kΩ - 75 kΩ | |
Non-linear Harmonic Distortion | 15 % | |
Output Power (POut) | 5.8 W | |
Plate Current (Ia) | 60 mA - 86 mA | |
Readiness Time | 50 s | |
Transconductance (S) | 5.2 mA/V - 6.8 mA/V |
![]() | All Models |
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Questions? Contact us at [email protected], or give us a call at 480-820-5411
Substitute Products
The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.
Product Reviews
Perfectly matched pair. Excellent performance.
Rugged tube. Able to withstand v4 plate voltage. But made for russian military. We don't buy Russian tubes anymore.
My tubes were in perfect working order. Packaged well and reliable. You all have become my new go to store for tubes, above all others.
Very satisfied with your service.