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 |
Specification Sheet | All Models |
My Project Lists
Specifications, Files, and Documents
Questions? Contact us at [email protected], or give us a call at 480-296-0890
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
These were purchased to restore a JCM 900 5881 4100 back to stock. These tubes are built like a tank and can easily handle 6l6 plate voltages (~490VDC in the JCM 900). As for tone, I prefer 6L6GC’s (like TAD) over these tubes. The Sovtek 5881 has a pronounced upper midrange but lacks bottom end fullness. Cool tube but there are better options sonically out there.
Easily the best option for a modern production 6L6 tube.
Probably the best modern option for a 6L6.
Great service. Will be installing in another week. Thanks for follow up. Tim
fine product. great customer service and quick shipping
Second set for my Soldano HR50+. Perfectly matched .. sound perfect. I’ll never buy tubes anywhere else!