Sophia Electric™ S.E.T Princess™ Vacuum Tube Specification

Classification: New design ST shape glass enclosure. Four-pin socket(like 300b base), Direct Heating oxide coated filamentary triode.

Application: Audio amplifier Class A service

Radio amplifier Class B service

Oscillator Class C service

Nominal operating conditions and parameters:

Filament voltage

4.0V

Nominal filament current

1.2A

Plate voltage

400V

Grid voltage

-24V

Plate current

50mA

Plate resistance

2.5 Kohms

Amplification factor

7.3

Limiting Operation conditions for safe operation-nor simultaneous ratings:

Maximum plate voltage

450 volts

Maximum plate dissipation

25 watts

Maximum plate current

70 ma