Electronic tube and vacuum tube catalog

Base

512-AX

Socket code

B9A

Sections

1

Heater

0.625 V / 13.3 mA

Plate

45 V / 0.0015 W

Screen

45 V

rP

4,000,000 Ω

gm

0.1 mA/V

9 pins - B9A - Small-button Noval 9-contact

Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 5911 in manufacturer literature. Its filamentary cathode and compact construction suit miniature signal-amplifier applications rather than power-output service.

Base

SUBMINIATURE

Socket code

WIRE8

Sections

1

Heater

0.625 V / 13.3 mA

Plate

45 V

Screen

45 V

rP

4,000,000 Ω

gm

0.1 mA/V

8 pins - WIRE8 - Subminiature all-glass 8-wire lead family

Subminiature low-frequency pentode for hearing aids and other very-low-power battery equipment. Its directly heated construction targets compact audio voltage amplification where minimal filament consumption is essential.