6SF7GT

GT-envelope diode-pentode for combined signal detection and voltage amplification. The pentode supplies receiver gain while the diode provides a complementary detector or rectifying function.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: IO
Base pins: -
Nominal heater: -

Description

Diode super-control amplifier pentode.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: IO
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.00205 S
Max plate voltage: 250 V
Max screen voltage: 100 V

Promoted values from 6SF7GT.pdf; section type follows printed electrode/function description.

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted values from 6SF7GT.pdf; section type follows printed electrode/function description.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1946 Amalgamated Wireless

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Grid-to-plate capacitance
0.005 pF
Direct interelectrode capacitance
Input capacitance
5.5 pF
Direct interelectrode capacitance
Output capacitance
6 pF
Direct interelectrode capacitance