4672

Compact acorn pentode for high- and low-frequency amplification and detector service, using low capacitances for high-frequency receiver applications.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: WITHOUTBASE-MV
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 150 mA

Description

Acorn pentode for HF/LF amplifier and detector service.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: WITHOUTBASE-MV
Socket code: -
Base pins: -
Nominal heater voltage: 6.3 V
Nominal heater current: 150 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

WITHOUTBASE-MV - 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: 3500000 Ω
Transconductance: 0.0014 S
Amplification factor: 5000
Max plate voltage: 250 V
Max screen voltage: 100 V
Max plate dissipation: 0.8 W
Max screen dissipation: 0.15 W
Max cathode current: 5 mA

Promoted only from clearly identified published characteristics/limits; additional operating, capacitance, regulator, gas-tube, and push-pull data retained as section parameters.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate current
2 mA
UHFAmplifier
Control-grid voltage
-3 V
UHFAmplifier
Screen voltage
100 V
UHFAmplifier
Suppressor-grid voltage
0 V
UHFAmplifier
Screen current
0.7 mA
UHFAmplifier

Characteristic

Plate resistance
3500000 Ω
UHFAmplifier
Transconductance
1400 µS
UHFAmplifier
Amplification factor
5000
UHFAmplifier

Capacitance

Grid-to-plate capacitance
0.007 pF
LessThan
Plate-to-cathode capacitance
3 pF
Section1
Grid-to-cathode capacitance
2.7 pF
Section1

Data set 02

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate voltage operating
90 V
Screen voltage operating
90 V
Plate current
1.2 mA
Control-grid voltage
-3 V
Screen current
0.5 mA
Alternate plate voltage
250 V
Alternate screen voltage
100 V
Alternate plate current
2 mA
Alternate screen current
0.7 mA
Plate voltage maximum
250 V
Plate dissipation maximum
0.8 W
Cathode current maximum
5 mA
Screen voltage maximum
100 V
Screen dissipation maximum
0.15 W
Grid circuit resistance maximum
3 Mohm
Heater-cathode voltage maximum
50 V
Heater-cathode resistance maximum
20000 ohm

Characteristics

Transconductance
1.1 mA/V
Plate resistance
1 Mohm
Alternate transconductance
1.4 mA/V
Alternate plate resistance
1.5 Mohm

Capacitance

Plate-grid capacitance maximum
0.007 pF
Grid-input capacitance
3 pF
Output capacitance
3.4 pF
Grid-filament capacitance
0.18 pF

Application

Application
HF/LF amplifier and detector