6F23

Small Signal Pentode — Noval

Ediswan Mazda

Known Equivalents & Substitutes

EF8126EL7Z749

Electrical Specifications

Absolute Maximum

Anode Voltage (max)Maximum Anode Voltage250V

Screen Voltage (max)Maximum Screen Voltage250V

Anode Dissipation (max)Maximum Anode Dissipation3W

Screen Dissipation (max)Maximum Screen Dissipation1W

Heater-to-Cathode Voltage (max)Maximum Heater-to-Cathode Voltage200V

Max Grid ResistorMaximum Resistance Control Grid to Cathode600MΩ

Typical Operating

Anode Voltage (typical)Anode Voltage170V

Screen Voltage (typical)Screen Voltage170V

Grid 1 Bias VoltageGrid Bias Voltage-1.9V

Anode CurrentAnode Current10mA

Screen CurrentScreen Current

Capacitances

Grid-to-Plate CapacitanceGrid-to-Plate Capacitance (Anode/Grid)0.008pF

Input CapacitanceInput Capacitance (Grid/Earth)9pF

Output CapacitanceOutput Capacitance (Anode/Earth)4pF

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.3A

Notes

Pa_max of 3W applies with a grid-cathode resistance not exceeding 10,000 ohms. With max anode dissipation of 2W and max screen dissipation of 0.5W, and a common anode and screen decoupling resistance of not less than 2,200 ohms, the limits are +/-10%.
Ps_max of 1W applies with the same grid-cathode resistance constraint of 10,000 ohms.
Vhk_max of 200V is measured from cathode to the higher-potential heater pin.
Two cathode pins (pins 1 and 3) are provided to minimise lead inductance for RF applications.
Datasheet is marked TENTATIVE (September 1959).

Pin Layout — Noval

1Cathode

2Control Grid

3Cathode

Socket-Compatible Tubes ⚠ Not electrically compatible

References