XXD

Twin triode amplifier with unipotential cathodes and two identical medium-mu sections, documented with Class-A1 operating characteristics and detailed interelectrode capacitances.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: B8G
Base pins: 8
Nominal heater: 12.6 V / 150 mA

Description

Twin triode amplifier with unipotential cathodes and identical sections; the sheet publishes Class A1 operating characteristics and direct interelectrode capacitances.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B8G
Base pins: 8
Nominal heater voltage: 12.6 V
Nominal heater current: 150 mA
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

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7600 Ω
Transconductance: 0.0021 S
Amplification factor: 16

Typical Class A1 characteristics at plate 250 V, control grid -10 V, plate current 9.0 mA.

Section 2

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 7600 Ω
Transconductance: 0.0021 S
Amplification factor: 16

Second physical triode section; identical twin section represented explicitly.

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

1961 Tung Sol

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Heater Voltage
12.6 V
ClassA1
Heater Current
150 mA
ClassA1
Plate Voltage
250 V
ClassA1
Control Grid Voltage
-10 V
ClassA1

Characteristic

Plate Current
9 mA
ClassA1

Capacitance

Grid To Cathode Capacitance
2.2 pF
EachTriode
Plate To Cathode Capacitance
1.6 pF
EachTriode
Grid To Plate Capacitance
2.3 pF
EachTriode
Grid1 To Grid2 Capacitance
0.2 pF
InterSection
Plate1 To Plate2 Capacitance
0.6 pF
InterSection
Grid1ToPlate2Capacitance
0.06 pF
InterSection
Grid2ToPlate1Capacitance
0.1 pF
InterSection