Vacuum Tube - 7591A, Tung-Sol Reissue

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Vacuum Tube - 7591A, Tung-Sol Reissue

Starting at: $31.95
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Tung Sol 7591A beam-power tube. Made in Russia.

Measurement from base to the top of the glass (pins not included in measurement): Slightly under 3"

Item ID:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-7591A-TUNG-MP841358102349
Matched QuadT-7591A-TUNG-MQ841358102356
Product Measurements
Amplification Factor16.8
Body Height2.75 in.
Capacitance, grid to plate0.25 pF
Capacitance, input10 pF
Capacitance, output5.0 pF
Cathode Current (Ik)85 mA
Grid 1 Voltage-10 V
Grid Circuit Resistance (Rg), Cathode Bias1.0 MΩ
Grid Circuit Resistance (Rg), Fixed Bias0.3 MΩ
Harmonic Distortion13 %
Heater Cathode Voltage, Negative200 V
Heater Cathode Voltage, Positive100 V
Heater Current0.8 A
Heater Voltage6.3 V
Item Diameter1.28125 in.
Item Height3.3125 in.
Load Resistance3 kΩ
Plate Current, max signal (Ia)75 mA
Plate Current, zero signal (Ia)60 mA
Plate Dissipation (Wa)19 W
Plate Resistance (Ra)29 kΩ
Plate Voltage (Ua)≤ 550 V, 300 V typical
Power Output11 W
Screen Current, max signal15 mA
Screen Current, zero signal8 mA
Screen Dissipation3.3 W
Screen Voltage≤ 440 V, 300 V typical
Transconductance (S)10,200 μmhos
Packaging Information
Packaging DimensionsMatched Pair version4.9 in. × 3.5 in. × 1.8 in.
Matched Quad version4.9 in. × 3.5 in. × 1.8 in.
Single version4.75 in. × 1.65 in. × 1.65 in.
Weight (Packaging)Matched Pair version0.292 lbs.
Matched Quad version0.584 lbs.
Single version0.146 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet95.4 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on November 22nd, 2016.
Matt H
November 22nd, 2016
We currently only offer Apex matching on the JJ 7591A.
November 21st, 2018
Will the Tung_Sol 7591A fit in a Eico ST-20 amplipher?
November 28th, 2018
Staff Member
These tubes measure 2.86" high. You will need to measure the space in your amp to verify.
Asked by Anonymous on November 22nd, 2016.
Matt H
November 22nd, 2016
They are all similar in size with the exception of the Tung Sol which is shorter by just shy of a half inch.
Asked by Anonymous on November 22nd, 2016.
Matt H
November 22nd, 2016
From the base of the tube to the top I'm getting a measurement of around 2-3/4" maybe just a bit more but definitely shy of 3".
Asked by Anonymous on January 30th, 2019.
February 1st, 2019
Staff Member
This tube measures 2.87" tall not including the pins while the JJ 7591 measures 3.11" tall excluding the pins. This tube is shorter than the JJ 7591.

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