Vacuum Tube - 5881WXT, Sovtek

Vacuum Tube - 5881WXT, Sovtek image 1
Customer image:<br/>"Soldano HR50+"
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Vacuum Tube - 5881WXT, Sovtek image 1
Customer Images:
Customer image: "Soldano HR50+"

Vacuum Tube - 5881WXT, Sovtek

Starting at: $18.25
In stock

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.

Apex Tube Matching
Matched versions of this tube use Apex Matching
RoHS Compliant
Item ID:
Sovtek, Apex Matched
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Apex Matched PairT-5881WXT-SV-MP609722124041
Apex Matched QuadT-5881WXT-SV-MQ609722124058
Product Measurements
Capacitance, Cathode to Heater11 pF
Capacitance, Transfer1.0 pF
Capacitance, input11 pF
Capacitance, output6.7 pF
Cathode to Heater Insulation Resistance4 MΩ
Filament Current (If)840 - 920 mA
Grid 1 Insulation Resistance200 MΩ
Grid 1 Inverse Current0.5 mA
Grid 2 Current6 mA
Internal Resistance (Ri)18 kΩ - 75 kΩ
Non-linear Harmonic Distortion15 %
Output Power (POut)5.8 W
Plate Current (Ia)60 mA - 86 mA
Readiness Time50 s
Transconductance (S)5.2 mA/V - 6.8 mA/V
Packaging Information
Packaging DimensionsApex Matched Pair version5.1 in. × 3.5 in. × 1.8 in.
Apex Matched Quad version5.1 in. × 3.5 in. × 3.5 in.
Single version1.5 in. × 1.5 in. × 4 in.
Weight (Packaging)Apex Matched Pair version0.266 lbs.
Apex Matched Quad version0.532 lbs.
Single version0.133 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet452.76 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on November 11th, 2016.
Matt H
November 23rd, 2016
Hello, this tube is 500 volts.
Asked by Anonymous on November 17th, 2016.
Matt H
November 17th, 2016
We can put together a matched quad in low, medium, or high. Simply send us a note when you place your order.

Product Reviews

5.00 out of 5 based on 2 reviews
- October 15th, 2019
5 out of 5

fine product. great customer service and quick shipping

- February 20th, 2019
5 out of 5

Second set for my Soldano HR50+. Perfectly matched .. sound perfect. I’ll never buy tubes anywhere else!

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