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Vacuum Tube - KT120, Tung-Sol Reissue
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
| Single or Matched | Our Part Number | UPC/EAN |
|---|---|---|
| Single | T-KT120-TUNG | 841358102462 |
| Matched Pair | T-KT120-TUNG-MP | 841358102479 |
| Matched Quad | T-KT120-TUNG-MQ | 841358102486 |
| Body Height | 144 mm | |
| Bulb Temperature | 250°C | |
| Capacitance, Grid 1 to Plate | 1.8 pF | |
| Capacitance, input | 29 pF | |
| Capacitance, output | 10 pF | |
| Cathode Current (Ik) | 230 mA | |
| Grid 1 Voltage | ≤ -200 V, -14 V typical | |
| Grid 2 Dissipation | 8 W | |
| Grid 2 Voltage | ≤ 600 V, 225 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 51 kΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 2.4 MΩ | |
| Harmonic Distortion | 14 % | |
| Heater Cathode Voltage, Negative | 300 V | |
| Heater Cathode Voltage, Positive | 200 V | |
| Heater Current | 1.7 A - 1.95 A | |
| Heater Voltage | 6.3 V | |
| Item Diameter | 52 mm | |
| Item Height | 130 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 Dimensions | Matched Pair version | T-KT120-TUNG-MP | 5.89 in. × 4.59 in. × 2.28 in. |
| Matched Quad version | T-KT120-TUNG-MQ | 5.89 in. × 4.59 in. × 4.59 in. | |
| Single version | T-KT120-TUNG | 2.25 in. × 2.25 in. × 5.85 in. | |
| Weight (Packaging) | Matched Pair version | T-KT120-TUNG-MP | 0.63 lbs. |
| Matched Quad version | T-KT120-TUNG-MQ | 1.22 lbs. | |
| Single version | T-KT120-TUNG | 0.3 lbs. |
| T-KT120-TUNG-MP - Matched Pair version | Body Height | 144 mm |
| Bulb Temperature | 250°C | |
| Capacitance, Grid 1 to Plate | 1.8 pF | |
| Capacitance, input | 29 pF | |
| Capacitance, output | 10 pF | |
| Cathode Current (Ik) | 230 mA | |
| Grid 1 Voltage | ≤ -200 V, -14 V typical | |
| Grid 2 Dissipation | 8 W | |
| Grid 2 Voltage | ≤ 600 V, 225 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 51 kΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 2.4 MΩ | |
| Harmonic Distortion | 14 % | |
| Heater Cathode Voltage, Negative | 300 V | |
| Heater Cathode Voltage, Positive | 200 V | |
| Heater Current | 1.7 A - 1.95 A | |
| Heater Voltage | 6.3 V | |
| Item Diameter | 52 mm | |
| Item Height | 130 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 | |
| T-KT120-TUNG-MQ - Matched Quad version | Body Height | 144 mm |
| Bulb Temperature | 250°C | |
| Capacitance, Grid 1 to Plate | 1.8 pF | |
| Capacitance, input | 29 pF | |
| Capacitance, output | 10 pF | |
| Cathode Current (Ik) | 230 mA | |
| Grid 1 Voltage | ≤ -200 V, -14 V typical | |
| Grid 2 Dissipation | 8 W | |
| Grid 2 Voltage | ≤ 600 V, 225 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 51 kΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 2.4 MΩ | |
| Harmonic Distortion | 14 % | |
| Heater Cathode Voltage, Negative | 300 V | |
| Heater Cathode Voltage, Positive | 200 V | |
| Heater Current | 1.7 A - 1.95 A | |
| Heater Voltage | 6.3 V | |
| Item Diameter | 52 mm | |
| Item Height | 130 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 | |
| T-KT120-TUNG - Single version | Body Height | 144 mm |
| Bulb Temperature | 250°C | |
| Capacitance, Grid 1 to Plate | 1.8 pF | |
| Capacitance, input | 29 pF | |
| Capacitance, output | 10 pF | |
| Cathode Current (Ik) | 230 mA | |
| Grid 1 Voltage | ≤ -200 V, -14 V typical | |
| Grid 2 Dissipation | 8 W | |
| Grid 2 Voltage | ≤ 600 V, 225 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 51 kΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 2.4 MΩ | |
| Harmonic Distortion | 14 % | |
| Heater Cathode Voltage, Negative | 300 V | |
| Heater Cathode Voltage, Positive | 200 V | |
| Heater Current | 1.7 A - 1.95 A | |
| Heater Voltage | 6.3 V | |
| Item Diameter | 52 mm | |
| Item Height | 130 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 |
 Specification Sheet | All Models |
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Questions and Answers
Click each question to see its answers.
1 answers
The price of $194 is for -4- matched tubes, correct?
Asked by Anonymous on October 20th, 2016.
Yes, you will get a matched quad.
1 answers
Can I use the kt 120 as a direct replacement for a 6550a
In my Conrad Johnson MVP 125 power amp?
Asked by Anonymous on 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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