Electronic tube and vacuum tube catalog

Base

B7G

Socket code

B7G

Electrical Summary

Heater	6.3 V / 200 mA
Plate	550 V / 1 W
Screen	400 V / 0.7 W
gm	2.4 mA/V

Sections

1

7 pins - B7G - Miniature 7-contact

Miniature hexode frequency changer designed for use with a separate triode oscillator, also suitable as a gated amplifier through approximately 20 MHz.

Base

—

Socket code

C7A

Electrical Summary

Heater	20 V / 180 mA
Plate	250 V
Screen	175 V / 0.4 W
Ik max	15 mA

Sections

1

7 pins - C7A - Continental 7-pin

Hexode oscillator-modulator designed for radio frequency-conversion and modulation service.

Base

—

Socket code

P8A

Electrical Summary

Heater	13 V / 200 mA
Plate	250 V / 1.5 W
Screen	125 V / 0.5 W
Ik max	10 mA
rP	2,000,000 Ω
gm	0.55 mA/V

Sections

1

8 pins - P8A - European 8-pin side-contact base

Hexode frequency-changing valve for early superheterodyne receivers, intended for mixer/modulator service with an external oscillator. High output resistance supports useful isolation in all-current series-heater radios.

Base

—

Socket code

—

Electrical Summary

Heater	4 V / 1.2 A
Plate	200 V
Screen	120 V
gm	0.58 mA/V

Sections

1

Early Philips indirectly heated hexode for oscillator-modulator and frequency-changing service. Its multi-grid structure allows oscillator and signal voltages to interact for conversion or modulation in early European receiving equipment.

Base

—

Socket code

—

Electrical Summary

Heater	4.3 V / 400 mA
Plate	250 V / 1.5 W
Screen	125 V / 0.5 W
rP	2,000,000 Ω
gm	1.8 mA/V

Sections

1

High-resistance hexode for first-detector/modulator and RF/IF amplifier service. Its multi-grid construction supports controlled mixing and signal amplification in radio receiver frequency-conversion stages.

Base

—

Socket code

—

Electrical Summary

Heater	2 V / 135 mA
Plate	150 V / 0.4 W
Screen	60 V / 0.1 W
Ik max	10 mA
rP	1,000,000 Ω

Sections

1

Directly heated multi-grid frequency changer for battery receivers, designed principally for mixer service but usable as a hexode, pentode, or tetrode. Its flexible electrode arrangement supports several portable-radio circuit configurations.

Base

—

Socket code

—

Electrical Summary

Heater	4 V / 1 A
Plate	250 V
Screen	100 V

Sections

1

Telefunken mixer hexode for superheterodyne frequency-changing service. Its multi-grid structure allows the incoming RF signal and a separate oscillator signal to interact, producing the receiver intermediate-frequency output.

Base

—

Socket code

—

Electrical Summary

Heater	4 V / 180 mA
Plate	200 V
Screen	100 V

Sections

1

Low-current series-heater mixer hexode for superheterodyne frequency conversion. Its multi-grid construction performs mixing with a separate oscillator, providing intermediate-frequency conversion in economical series-heater receivers.

Base

—

Socket code

SP6

Electrical Summary

Heater	12.6 V
Screen	20 V / 0.5 W

Sections

1

SP6 - German military side-contact 6-contact

German military hexode for frequency conversion and related multi-grid signal-processing service. Its several control grids allow separate signals to interact within one tube, with heater characteristics suited to military equipment supplies.

Base

—

Socket code

—

Electrical Summary

Heater	2.4 V / 60 mA
Plate	150 V / 0.6 W
Screen	150 V / 0.4 W
rP	600,000 Ω
gm	0.9 mA/V

Sections

1

Low-consumption German military hexode for frequency conversion and related signal-processing duties. Its directly heated filament minimizes power consumption in portable military radio equipment while the multi-grid structure provides mixer operation.