Vacuum Tube - 5881WXT, Sovtek

Name: Vacuum Tube - 5881WXT, Sovtek
Brand: Sovtek, Apex Matched
SKU: T-5881WXT-SV
Price: 41.70 USD
Availability: InStock
Rating: 5.00 (3 reviews)

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Starting at: $41^.70

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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

SKU:

T-5881WXT-SV

Item ID:

004547

Brand:

Sovtek, Apex Matched

Type:

Power

RoHS Compliant

Accessory Items:

Damper Rings - High Temperature Silicone, Red

Part Numbers
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

Measurements by Type
Measurements by Item

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
Height, base to top			3.5 in.
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	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 (I_f)	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 (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
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 (I_f)	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 (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
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 (I_f)	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 (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

Specification Sheet	All Models

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Specifications, Files, and Documents

Specification Sheet

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Questions? Contact us at [email protected], or give us a call at 480-820-5411

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Product Reviews

5.00 out of 5 based on 3 reviews

John Jankowski - September 2nd, 2022

5 out of 5

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Perfectly matched pair. Excellent performance.

jchurch_no1sn.com - March 3rd, 2022

5 out of 5

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Rugged tube. Able to withstand v4 plate voltage. But made for russian military. We don't buy Russian tubes anymore.

Eric Tripton - February 23rd, 2022

5 out of 5

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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.

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.