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Vacuum Tube - 5881 / 6L6WGC, Sovtek

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SKU:	T-5881-SOVT
Item ID:	004545

Starting at: $16^.95

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Type

Power

Vacuum Tubes Apex Matched

The 5881 is a very reliable tube that is widely used in many current production tube amplifiers. It has a warm tone with good 'bite.' This modern version is able to tolerate higher voltages than its 5881 / 6L6 cousins. 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. Maximum plate voltage is 250 volts while maximum plate current is 73 mA. The 5881 has a Transconductance rating of 6000 micromhos and a maximum output power of 5.8 watts.

Matched versions of this tube use Apex Matching

Part Numbers
Single or Matched	Our Part Number	UPC/EAN
Apex Matched Pair	T-5881-SOVT-MP	609722124010
Apex Matched Quad	T-5881-SOVT-MQ	609722124027

RoHS Compliant

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Specifications, Files, and Documents

Specification Sheet

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Product Measurements (click to expand)

Product Measurements
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 (I_f)		840 - 920 mA
Grid 1 Insulation Resistance		200 MΩ
Grid 1 Inverse Current		0.5 mA
Grid 2 Current		6 mA
Internal Resistance (R_i)		18 kΩ - 75 kΩ
Non-linear Harmonic Distortion		15 %
Output Power (P_Out)		5.8 W
Plate Current (I_a)		60 mA - 86 mA
Readiness Time		50 s
Transconductance (S)		5.2 mA/V - 6.8 mA/V

Packaging Information
Packaging Dimensions	Apex Matched Pair version	5.1 in. × 3.5 in. × 1.8 in.
	Apex Matched Quad version	5.1 in. × 3.5 in. × 3.5 in.
	Single version	1.5 in. × 1.5 in. × 4 in.
Weight (Packaging)	Apex Matched Pair version	0.294 lbs.
	Apex Matched Quad version	0.588 lbs.
	Single version	0.147 lbs.

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Product Reviews

5.00 out of 5 based on 3 reviews

5 out of 5

These things sound RAD! Tight, nice compression.

Adam 1000 - February 9th, 2019

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5 out of 5

Very pleased with the "sound" of these Sovteks. Smooth midrange and high end with solid bass. I like these better than some of the more expensive 6L6's

Jim Bilenda - January 29th, 2017

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5 out of 5

Good basic power tubes

Rick Shaw - April 19th, 2015

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Questions and Answers

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Hello which is the Max Dissipation Watt for this tube?1 answers

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Asked by Anonymous on November 19th, 2015.

Answers (1)

JustinG

Staff Member

Top Contributor

November 19th, 2015

The Max Dissipation is 23.5 watts.

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My amp(a Marshall JTM 30)came with stock 5881/6L6WGC tubes I'm looking for a sweeter sound any suggestions?1 answers

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Asked by Anonymous on December 22nd, 2017.

Answers (1)

Matt H.

Staff Member

December 22nd, 2017

Since we do not know what brand originally came in your amp, it is hard to make a comparison. This is a great tube and one of the most popular 5881's we carry.

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Good for a line 6 spider valve mk11 hd100?1 answers

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Asked by Anonymous on February 23rd, 2018.

Answers (1)

Matt H.

Staff Member

February 28th, 2018

From the Line 6 Spider Valve mkii HD100 manual, your amp takes a pair of 5881's and these should work.

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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.