Vacuum Tube - 6550, Electro-Harmonix
Superior high-power Octal Beam Tetrode, suitable for any amp using 6550 or KT88. Designed to hold up in even the most punishing environment of high powered bass amps, such as Ampeg SVT. With 42 watts of plate dissipation in tetrode operation and 44 watts in triode, power is improved even over desirable vintage types.
- Thanks to extra headroom, bass players can realize the full dynamic and tonal range of the instrument
- Nickel steel side rod mica supports sweet tone regardless of setup, even in combos where the tube is only inches from the speaker
- Also suitable for hifi use
- KT88 equivalent
RoHS Compliant
Single or Matched | Our Part Number | UPC/EAN |
---|---|---|
Matched Pair | T-6550-EH-MP | 609722128339 |
Matched Quad | T-6550-EH-MQ | 609722128346 |
Matched Sextet | T-6550-EH-MS | 609722128353 |
Single | T-6550-EH | 609722128322 |
Bulb Temperature | 250°C | ||
Capacitance, Grid to Others | 18 pF | ||
Capacitance, Plate to Others | 12.5 pF | ||
Capacitance, grid to plate | 0.88 pF | ||
Cathode Current, Tetrode | 230 mA | ||
Cathode Current, Triode | 190 mA | ||
Grid Circuit Resistance (Rg), Fixed Bias | 50 kΩ | ||
Grid Circuit Resistance (Rg), Self Bias | 0.24 MΩ | ||
Heater Current | 1.6 A | ||
Heater Voltage | 6.0 V - 6.5 V | ||
Heater to Cathode Voltage | 300 V, -200 V | ||
Plate Dissipation, per tetrode (Wa) | 42 W | ||
Plate Dissipation, per triode (Wa) | 44 W | ||
Plate Resistance (Ra) | 14.8 kΩ | ||
Plate Voltage, tetrode (Ua) | 800 V | ||
Plate Voltage, triode (Ua) | 440 V | ||
Screen Dissipation | 6.6 W | ||
Screen Voltage | 440 V | ||
Transconductance (S) | 11.2 mA/V |
Packaging Dimensions | Matched Pair version | T-6550-EH-MP | 5.5 in. × 4.25 in. × 2 in. |
Matched Quad version | T-6550-EH-MQ | 5.8 in. × 4.3 in. × 4.3 in. | |
Matched Sextet version | T-6550-EH-MS | 6.25 in. × 5.5 in. × 4.25 in. | |
Single version | T-6550-EH | 2.2 in. × 2.2 in. × 5.8 in. | |
Weight (Packaging) | Matched Pair version | T-6550-EH-MP | 0.48 lbs. |
Matched Quad version | T-6550-EH-MQ | 0.96 lbs. | |
Matched Sextet version | T-6550-EH-MS | 1.44 lbs. | |
Single version | T-6550-EH | 0.2579 lbs. |
T-6550-EH-MS - Matched Sextet version | Bulb Temperature | 250°C |
Capacitance, Grid to Others | 18 pF | |
Capacitance, Plate to Others | 12.5 pF | |
Capacitance, grid to plate | 0.88 pF | |
Cathode Current, Tetrode | 230 mA | |
Cathode Current, Triode | 190 mA | |
Grid Circuit Resistance (Rg), Fixed Bias | 50 kΩ | |
Grid Circuit Resistance (Rg), Self Bias | 0.24 MΩ | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Heater to Cathode Voltage | 300 V, -200 V | |
Plate Dissipation, per tetrode (Wa) | 42 W | |
Plate Dissipation, per triode (Wa) | 44 W | |
Plate Resistance (Ra) | 14.8 kΩ | |
Plate Voltage, tetrode (Ua) | 800 V | |
Plate Voltage, triode (Ua) | 440 V | |
Screen Dissipation | 6.6 W | |
Screen Voltage | 440 V | |
Transconductance (S) | 11.2 mA/V | |
T-6550-EH-MP - Matched Pair version | Bulb Temperature | 250°C |
Capacitance, Grid to Others | 18 pF | |
Capacitance, Plate to Others | 12.5 pF | |
Capacitance, grid to plate | 0.88 pF | |
Cathode Current, Tetrode | 230 mA | |
Cathode Current, Triode | 190 mA | |
Grid Circuit Resistance (Rg), Fixed Bias | 50 kΩ | |
Grid Circuit Resistance (Rg), Self Bias | 0.24 MΩ | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Heater to Cathode Voltage | 300 V, -200 V | |
Plate Dissipation, per tetrode (Wa) | 42 W | |
Plate Dissipation, per triode (Wa) | 44 W | |
Plate Resistance (Ra) | 14.8 kΩ | |
Plate Voltage, tetrode (Ua) | 800 V | |
Plate Voltage, triode (Ua) | 440 V | |
Screen Dissipation | 6.6 W | |
Screen Voltage | 440 V | |
Transconductance (S) | 11.2 mA/V | |
T-6550-EH-MQ - Matched Quad version | Bulb Temperature | 250°C |
Capacitance, Grid to Others | 18 pF | |
Capacitance, Plate to Others | 12.5 pF | |
Capacitance, grid to plate | 0.88 pF | |
Cathode Current, Tetrode | 230 mA | |
Cathode Current, Triode | 190 mA | |
Grid Circuit Resistance (Rg), Fixed Bias | 50 kΩ | |
Grid Circuit Resistance (Rg), Self Bias | 0.24 MΩ | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Heater to Cathode Voltage | 300 V, -200 V | |
Plate Dissipation, per tetrode (Wa) | 42 W | |
Plate Dissipation, per triode (Wa) | 44 W | |
Plate Resistance (Ra) | 14.8 kΩ | |
Plate Voltage, tetrode (Ua) | 800 V | |
Plate Voltage, triode (Ua) | 440 V | |
Screen Dissipation | 6.6 W | |
Screen Voltage | 440 V | |
Transconductance (S) | 11.2 mA/V | |
T-6550-EH - Single version | Bulb Temperature | 250°C |
Capacitance, Grid to Others | 18 pF | |
Capacitance, Plate to Others | 12.5 pF | |
Capacitance, grid to plate | 0.88 pF | |
Cathode Current, Tetrode | 230 mA | |
Cathode Current, Triode | 190 mA | |
Grid Circuit Resistance (Rg), Fixed Bias | 50 kΩ | |
Grid Circuit Resistance (Rg), Self Bias | 0.24 MΩ | |
Heater Current | 1.6 A | |
Heater Voltage | 6.0 V - 6.5 V | |
Heater to Cathode Voltage | 300 V, -200 V | |
Plate Dissipation, per tetrode (Wa) | 42 W | |
Plate Dissipation, per triode (Wa) | 44 W | |
Plate Resistance (Ra) | 14.8 kΩ | |
Plate Voltage, tetrode (Ua) | 800 V | |
Plate Voltage, triode (Ua) | 440 V | |
Screen Dissipation | 6.6 W | |
Screen Voltage | 440 V | |
Transconductance (S) | 11.2 mA/V |
Specification Sheet | All Models |
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Questions? Contact us at [email protected], or give us a call at 480-755-4712
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