5B300B

RF pentode documented by Standard Valves for high-frequency signal service. Manufacturer data include electrode and capacitance information, identifying it as an RF amplifier tube rather than a power-output pentode.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: M7A
Base pins: 7
Nominal heater: 10 V / 800 mA

Description

RF Pentodes. Output capacity 8µµF. ELECTRODES.

Socket description

British/European 7-pin

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: M7A
Base pins: 7
Nominal heater voltage: 10 V
Nominal heater current: 800 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

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

Transconductance: 0.006 S
Max plate voltage: 500 V
Max screen voltage: 300 V
Max plate dissipation: 30 W
Max screen dissipation: 6 W
Max cathode current: 60 mA

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 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Grid-anode capacitance
1.2 pF
Input capacitance
16 pF
Output capacitance
8 pF

Other

Maximum direct anode current
60 mA
Maximum direct screen current
25 mA
Maximum frequency for full ratings
40 MHz
Anode voltage at 70 MHz
300 V
70MHz

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

Interelectrode capacitances published
1
See source table for individual capacitances