Tube-Specific Calculators
Plate & Grid Circuit Calculator
12AT7/ECC81 High-Mu Dual Triode
The amplification factor, plate resistance, and transconductance are shown here based on the DC plate current. The various curves are for different values of DC plate voltage, which is indicated as Eb. The red, blue, and green lines represent an amplification factor of 60, plate resistance of 10.9k, and transconductance of 5.5mA/V, respectively, which are the approximations usually used by amplifier designers.
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DC Operating Point Plate Voltage:
DC Peak Plate Voltage:
DC Plate Current:
Average Plate Dissipation:
Grid-to-Cathode Resistance: |
Heater-to-Cathode Voltage:
Positive DC grid voltage:
Negative DC grid voltage: |
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Grid to Cathode+Heater: 2.2pF (with or without shield) Grid to Plate: 1.5pF
Plate to Cathode+Heater: |
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Heater Requirements
Pin 4 to Pin 5:
Pin 9 to Pins 4 and 5: The tube can be mounted in any position. |
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