Vacuum Tube - KT120, Tung-Sol Reissue

Vacuum Tube - KT120, Tung-Sol Reissue image 1
Customer image:<br/>"Siegmund Big Boy 300 Watt Bass Amp"
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Vacuum Tube - KT120, Tung-Sol Reissue image 1
Customer Images:
Customer image: "Siegmund Big Boy 300 Watt Bass Amp"

Vacuum Tube - KT120, Tung-Sol Reissue

Starting at: $47.95
In stock

Super-premium Octal Beam Tetrode, impervious to overload when used at parameters found in existing 6550/KT88/KT90 circuits. Plate dissipation of 60 watts and higher current handling capacity has allowed the design of new amplifiers which are unique, extremely powerful and stable.

  • Delivers peak power with extreme reliability and long tube life
  • A pair of KT120s in push-pull configuration can deliver power levels of 150 or more watts
Item ID:
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-KT120-TUNG-MP841358102479
Matched QuadT-KT120-TUNG-MQ841358102486
Product Measurements
Body Height144 mm
Bulb Temperature250°C
Capacitance, Grid 1 to Plate1.8 pF
Capacitance, input29 pF
Capacitance, output10 pF
Cathode Current (Ik)230 mA
Grid 1 Voltage≤ -200 V, -14 V typical
Grid 2 Dissipation8 W
Grid 2 Voltage≤ 600 V, 225 V typical
Grid Circuit Resistance (Rg), Fixed Bias51 kΩ
Grid Circuit Resistance (Rg), Self Bias2.4 MΩ
Harmonic Distortion14 %
Heater Cathode Voltage, Negative300 V
Heater Cathode Voltage, Positive200 V
Heater Current1.7 A - 1.95 A
Heater Voltage6.3 V
Item Diameter52 mm
Item Height130 mm
Plate Dissipation (Wa)60 W
Plate Resistance (Ra)3 kΩ
Plate Voltage, tetrode (Ua)850 V
Plate Voltage, triode (Ua)≤ 650 V, 400 V typical
Transconductance (S)12.5 mA/V
Packaging Information
Packaging DimensionsMatched Pair version5.89 in. × 4.59 in. × 2.28 in.
Matched Quad version5.89 in. × 4.59 in. × 4.59 in.
Single version2.25 in. × 2.25 in. × 5.85 in.
Weight (Packaging)Matched Pair version0.63 lbs.
Matched Quad version1.22 lbs.
Single version0.3 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet2.32 MB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on October 20th, 2016.
Matt H
October 20th, 2016
Yes, you will get a matched quad.
Asked by Anonymous on August 25th, 2017.
Matt H
August 25th, 2017
We are unsure if the KT120's are compatible with your Conrad Johnson. We recommend you contact the manufacture for compatibility.

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