ECC34

Small Signal Triode — Octal

Mullard

Known Equivalents & Substitutes

No known equivalents. If you know of any, use the ⚑ Report Issue button above.

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Anode Voltage (max)300V

Anode Dissipation (max)Anode Dissipation (max, per section)3.25W

Cathode Current (max)Cathode Current (max)50mA

Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)50V

Max Grid ResistorMax Grid Resistor2MΩ

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)250V

Grid 1 Bias VoltageGrid 1 Bias Voltage-16V

Anode CurrentAnode Current10mA

Anode ResistanceAnode Resistance5,200Ω

TransconductanceTransconductance

Capacitances

Grid-to-Plate CapacitanceGrid-to-Plate Capacitance4pF

Grid-to-Cathode CapacitanceGrid-to-Cathode Capacitance3.5pF

Anode-to-Cathode CapacitanceAnode-to-Cathode Capacitance1.8pF

other

Inter-anode Capacitance (Ca'-a")Inter-anode Capacitance (Ca'-a")0.48pF

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.95A

Notes

Pin compatible with the ECC32 and draws the same heater current (0.95 A), but has roughly 30% the mu of an ECC32 (11.5 vs 32) and much lower ra (5.2 kΩ vs 16.5 kΩ). Not a direct substitute.
Va(b) max of 550 V is the maximum anode voltage at zero anode current (no-signal or blocked condition), not the operating maximum.
Rh-k max of 20 kΩ limits the heater-to-cathode bias resistor — relevant in elevated-cathode circuits.

Pin Layout — Octal