5670

Small Signal Triode — Noval

General Electric

Known Equivalents & Substitutes

2C51396A2C51W5670WACK5670GL567063856CC426N3P61851219CV2575CV4013CV2831CV8247CV5894

Electrical Specifications

Absolute Maximum

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

Anode Dissipation (max)Plate Dissipation (max)1.5W

Cathode Current (max)Cathode Current (max)18mA

Heater-to-Cathode Voltage (max)Heater-to-Cathode Voltage (max)90V

Max Grid Resistor

Notes

The 5670 is a ruggedized special-quality version of the 2C51, with derated maximum ratings for improved reliability. GE rates Va_max at 300V and Pa_max at 1.5W, versus 330V and 1.6W for the standard 2C51.
Rg_max is 1 MΩ with fixed bias and 2 MΩ with cathode bias (from 2C51 datasheet).
Internal shield on pin 5 should be connected to cathode for specified capacitance values.
Certified for airborne use up to 80,000 feet with low microphony.
Originally developed from the 2C51 for computer and military applications. The 396A is the JAN (Joint Army-Navy) military designation for the same basic design.
Heater current is 0.350A (GE datasheet) — some sources list 0.300A which applies to the 2C51/396A; verify for specific manufacturer.

Pin Layout — Noval

1Heater

2Cathode (Section 2)

3Control Grid (Section 2)

References