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Power - Pentode (NOT beam) ·Pentode

5B501B

Power pentode designed for radio-frequency transmitting, Class-C power amplification, oscillation, or frequency-multiplier service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
M7A
Base pins
7
Nominal heater
13 V / 1 A

Description

RF Pentodes.

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
13 V
Nominal heater current
1 A
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
0.0045 S
Max plate voltage
1250 V
Max screen voltage
400 V
Max plate dissipation
50 W
Max screen dissipation
10 W

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

    0.15 pF

  • Input capacitance

    20 pF

  • Output capacitance

    7 pF

Other

  • Maximum direct suppressor voltage

    40 V

  • Maximum frequency for full ratings

    20 MHz

  • Typical peak output power

    60 W

    ClassC;Unmodulated

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