1P5G

Remote-cutoff RF pentode designed for variable-gain battery receiver service. Its directly heated construction combines low filament demand with controlled transconductance for automatic-gain-control RF stages.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 5Y
Socket code: IO
Base pins: 7
Nominal heater: 1.4 V / 50 mA

Description

Remote-cutoff RF pentode for variable-gain battery receiver service. Electrical ratings and representative operating data were extracted from the approved manual page.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 5Y
Socket code: IO
Base pins: 7
Nominal heater voltage: 1.4 V
Nominal heater current: 50 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

5Y - 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: 800000 Ω
Transconductance: 0.00075 S
Amplification factor: 640
Max plate voltage: 110 V
Max screen voltage: 110 V

Source-defined physical/function section.

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

1937 Ken Rad

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
90 V
Plate Voltage 90 Volts
Screen Voltage
90 V
Screen Voltage 90 Volts
Grid Voltage
0 V
Grid Voltage* 0 Volts
Plate Current
2.3 mA
Plate Current 2.3 Milliamperes
Screen Current
7 mA
Screen Current .7 Milliampere
Mutual Conductance
800 µS
Mutual Conductance 800 Micromhos
Mutual Conductance
10 V
Mutual Conductance at Ec; = -12 Volts (Approx.) 10 Micromhos

Characteristics

Plate Voltage
7 V
| PLATE VOLTAGE 7

Data set 02

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

Plate Voltage
90 V
Screen Voltage
90 V
Plate Current
2.3 mA
Screen Current
0.7 mA

Characteristic

Plate Resistance
0.8 Mohm
Transconductance
750 µS

Data set 03

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Input capacitance
3 pF
Output capacitance
10 pF
Grid-to-plate capacitance
0.007 pF

Other

Plate voltage
90 V
ClassA; OperatingPoint1
Screen voltage
90 V
ClassA; OperatingPoint1
Control-grid bias
0 V
ClassA; OperatingPoint1
Plate current
2.3 mA
ClassA; OperatingPoint1
Screen current
0.7 mA
ClassA; OperatingPoint1