1S6

Very-low-power battery diode-pentode for detector and amplifier service. The diode provides signal detection while the pentode supplies subsequent voltage amplification from an exceptionally economical directly heated filament.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: 8DA
Socket code: -
Base pins: 8
Nominal heater: 1.25 V / 40 mA

Description

Combined diode and pentode for detector and amplifier service in battery receivers. Electrical ratings and representative operating data were extracted from the approved manual page.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8DA
Socket code: -
Base pins: 8
Nominal heater voltage: 1.25 V
Nominal heater current: 40 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8DA - 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

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Detector diode section.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 400000 Ω
Transconductance: 0.0006 S
Max plate voltage: 100 V
Max screen voltage: 100 V
Max cathode current: 2 mA

Combined diode and pentode for detector and amplifier service in battery receivers.

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

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Maximum Diode Current
0.25 mA
Continuous

SECTION 2

Pentode

Other

Plate Voltage
30 V
Point 1
Plate Voltage
45 V
Point 2
Plate Voltage
67.5 V
Point 3
Plate Current
0.33 mA
30 V
Plate Current
0.75 mA
45 V
Plate Current
1.6 mA
67.5 V

Characteristic

Transconductance
330 µS
30 V
Transconductance
475 µS
45 V
Transconductance
600 µS
67.5 V

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

Plate voltage
67.5 V
ClassA; OperatingPoint1
Screen voltage
67.5 V
ClassA; OperatingPoint1
Control-grid bias
0 V
ClassA; OperatingPoint1
Plate current
1.6 mA
ClassA; OperatingPoint1
Screen current
0.4 mA
ClassA; OperatingPoint1
Plate voltage
30 V
ClassA; OperatingPoint2
Screen voltage
30 V
ClassA; OperatingPoint2
Control-grid bias
0 V
ClassA; OperatingPoint2
Plate current
0.33 mA
ClassA; OperatingPoint2
Screen current
0.1 mA
ClassA; OperatingPoint2