DL93

Centre-tapped-filament battery output pentode. Designed for portable audio power amplification, its filament arrangement provides supply flexibility in battery-operated receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Miniature
Socket code: B7G
Base pins: 7
Nominal heater: 1.4 V / 200 mA

Description

Centre-tapped-filament battery output pentode.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Miniature
Socket code: B7G
Base pins: 7
Nominal heater voltage: 1.4 V
Nominal heater current: 200 mA
Parallel heater voltage: 1.4 V
Parallel heater current: 200 mA
Series capable: Yes

Miniature - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 100000 Ω
Transconductance: 0.0019 S
Max plate voltage: 150 V
Max screen voltage: 150 V
Max plate dissipation: 2 W
Max screen dissipation: 0.4 W
Max cathode current: 25 mA

Published ratings and characteristics promoted semantically from the approved source; repeated identical physical sections compressed where applicable.

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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
150 V
ParallelFilament
Screen Voltage
90 V
Plate Current
13.3 mA

Characteristic

Transconductance
1900 µS
Plate Resistance
100000 ohm

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristic

HeaterOrFilamentVoltage
1.4 V
HeaterOrFilamentCurrent
100 mA
FilamentConnectionOptions
Series;Parallel;SingleSection
FilamentSectionVoltage
1.4 V
Plate To Grid Capacitance
0.2 pF
Input Capacitance
3 pF
Output Capacitance
5 pF

Data set 03

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Anode voltage
150 V
ClassA
Screen-grid voltage
30 V
ClassA
Anode current
13.3 mA
ClassA
Screen-grid current
2.2 mA
ClassA
Output power
700 mW
ClassA
Load resistance
8 kOhm
ClassA

Capacitance

Input capacitance
4.8 pF
Anode-grid capacitance
<0.34 pF