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Voltage Radio Detector Converter ·Diode-Pentode

DAF96

Low-consumption directly heated diode-pentode for detection and audio-frequency voltage amplification in battery receivers. Its 1.4 V, 25 mA filament makes it especially economical for portable equipment where battery life is important.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: B7G
Socket code: B7G
Base pins: 7
Nominal heater: 1.4 V / 25 mA

Description

Directly heated diode-pentode for detection and low-frequency voltage amplification in low-power receivers.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: B7G
Socket code: B7G
Base pins: 7
Nominal heater voltage: 1.4 V
Nominal heater current: 25 mA
Parallel heater voltage: 1.4 V
Parallel heater current: 25 mA
Series capable: No

B7G - 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

Max cathode current: 0.2 mA
Rectifier peak inverse voltage: 100 V
Rectifier nominal output current: 200 mA
Rectifier peak forward current: 1.2 A

Published ratings and characteristics promoted from the printed technical data.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 1000000 Ω
Transconductance: 0.0007 S
Amplification factor: 16
Max plate voltage: 120 V
Max screen voltage: 90 V
Max plate dissipation: 0.03 W
Max screen dissipation: 0.01 W
Max cathode current: 0.25 mA

Published ratings and characteristics promoted from the printed technical data.

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

1953 RFT Rundfunk Technik

Published operating points and test conditions from this source.

SECTION 1

Diode

Characteristics

Heater or filament voltage
1.4 V
Published nominal value
Heater or filament current
25 mA
Published nominal value

Other

Maximum plate dissipation
0.03 W
Published limit

SECTION 2

Pentode

Characteristics

Heater or filament voltage
1.4 V
Published nominal value
Heater or filament current
25 mA
Published nominal value

Other

Maximum plate dissipation
0.03 W
Published limit

Data set 02

1958 Brimar Radio Valve No 7

Published operating points and test conditions from this source.

SECTION 1

Diode

Application

Application
Detector diode

SECTION 2

Pentode

Application

Application
AF amplifier

Data set 03

1961 Ferranti Technical Handbook

Published operating points and test conditions from this source.

SECTION 1

Diode

Application

Application
Detector diode

SECTION 2

Pentode

Application

Application
AF amplifier

Data set 04

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Peak inverse voltage
100 V
Anode current maximum
200 uA
Peak anode current maximum
1.2 mA

SECTION 2

Pentode

Capacitance

Anode-grid capacitance
0.3 pF
Input capacitance
1.8 pF

Characteristic

Anode voltage
67.5 V
Screen voltage
67.5 V
Anode current
170 uA
Screen current
55 uA
Grid-screen amplification factor
16

Other

Absolute plate voltage maximum
110 V
Plate voltage maximum
90 V
Plate dissipation maximum
30 mW
Screen voltage maximum
90 V
Screen dissipation maximum
10 mW
Cathode current maximum
250 uA

Data set 05

1963 Philips Electron Tubes Handbook V1

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Peak inverse voltage maximum
100 V
DetectorDiode
Average diode current maximum
0.2 mA
DetectorDiode
Peak diode current maximum
1.2 mA
DetectorDiode

SECTION 2

Pentode

Capacitance

Plate capacitance
2.7 pF
Section1
Grid capacitance
1.8 pF
Section1
Grid-to-plate capacitance maximum
0.3 pF
Section1
Diode capacitance
1.1 pF
Section1

Other

Supply voltage
64 V
AudioAmplifier;PentodeConnection
Plate load
1 MΩ
AudioAmplifier;PentodeConnection
Screen resistor
2.7 MΩ
AudioAmplifier;PentodeConnection
Plate current
42 µA
AudioAmplifier;PentodeConnection
Screen current
13 µA
AudioAmplifier;PentodeConnection
Supply voltage
85 V
AudioAmplifier;PentodeConnection
Plate current
64 µA
AudioAmplifier;PentodeConnection
Screen current
21 µA
AudioAmplifier;PentodeConnection
Supply voltage
85 V
AudioAmplifier;TriodeConnection
Plate current
110 µA
AudioAmplifier;TriodeConnection

Data set 06

1967 Mullard Receiving Tubes for Maintenance

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

Peak Inverse Voltage
100 V
DiodeSection
Average Diode Current
0.2 mA
DiodeSection
Peak Diode Current
1.2 mA
DiodeSection

SECTION 2

Pentode

Capacitance

Plate-to-Grid Capacitance
<0.3 pF
PublishedCapacitance
Input Capacitance
1.8 pF
PublishedCapacitance
Output Capacitance
2.5 pF
PublishedCapacitance
Diode-to-All Electrodes Capacitance
1.1 pF
PublishedCapacitance
Diode-to-Plate Capacitance
<0.9 pF
PublishedCapacitance
Diode-to-Grid Capacitance
0.03 pF
PublishedCapacitance

Characteristic

Plate Voltage
67.5 V
PentodeSection
Screen Voltage
67.5 V
PentodeSection
Plate Current
170 uA
PentodeSection
Screen Current
55 uA
PentodeSection
Control Grid Voltage
-1.5 V
PentodeSection
Transconductance
170 uS
PentodeSection
Screen-to-Control-Grid Mu
16
PentodeSection

Other

Plate Voltage
90 V
PentodeSection
Plate Dissipation
0.03 W
PentodeSection
Screen Voltage
90 V
PentodeSection
Screen Dissipation
0.01 W
PentodeSection
Cathode Current
0.25 mA
PentodeSection

Data set 07

1968 Mazda Belvu

Published operating points and test conditions from this source.

SECTION 2

Pentode

Application

Application
AFVoltageAmplifier text

Data set 08

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 2

Pentode

Other

Maximum anode voltage
120 V
Series-feed filament voltage
1.3 V
SeriesHeater