6145

Lock-In sharp-cutoff pentode amplifier designed for electronic-computer service. Its fixed-gain signal-amplifier function is combined with Lock-In construction for reliable operation in early electronic computing equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 8V
Socket code: B8G
Base pins: 8
Nominal heater: 6.3 V / 600 mA

Description

Lock-in sharp-cutoff pentode amplifier for electronic-computer service.

Socket description

Loctal 8-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 8V
Socket code: B8G
Base pins: 8
Nominal heater voltage: 6.3 V
Nominal heater current: 600 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

8V - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1H	—	H — Heater EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8V
PIN2P	A	P — Plate (Anode) EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8V
PIN3G2	A	G2 — Screen Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8V
PIN4G3	A	G3 — Suppressor Grid EIA source transcription; manufacturer confirmation pending	Unverified EIA Base Connections, printed page 129, 8V
PIN5IS	A	IS — Internal Screen EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 8V
PIN6G1	A	G1 — Control Grid EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 8V
PIN7K	A	K — Cathode EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 8V
PIN8H	—	H — Heater EIA chart transcription; manufacturer verification pending	Unverified EIA Base Connections, printed page 129, 8V

Section ratings

1 physical section, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Plate resistance: 100000 Ω
Transconductance: 0.0097 S
Max plate voltage: 300 V
Max screen voltage: 150 V
Max plate dissipation: 10 W
Max screen dissipation: 2.5 W

Sharp-cutoff pentode; pulse-amplifier conditions published.

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

Pentode

Characteristic

Heater Voltage
6.3 V
Heater Current
600 mA
Plate Current
34 mA
PlateVoltage=150V

Data set 02

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Capacitance

Input capacitance
14 pF
Output capacitance
7.5 pF
Grid-to-plate capacitance
0.06 pF

Other

Plate voltage
150 V
PulseAmplifier
Screen-grid voltage
100 V
PulseAmplifier
Grid voltage
0 V
PulseAmplifier
Plate current
34 mA
PulseAmplifier
Screen-grid current
8 mA
PulseAmplifier

Characteristic

Plate resistance
100000 ohm
PulseAmplifier