PENDD4021

Combination valve integrating a beam-power audio-output section with two detector diodes for compact receiver detection, AVC, and loudspeaker-driving functions.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 3
Base: -
Socket code: -
Base pins: -
Nominal heater: 45 V / 200 mA

Description

Beam-power output valve incorporating a double-diode section for AC/DC receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 45 V
Nominal heater current: 200 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

3 physical sections, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Transconductance: 0.012 S
Max plate voltage: 200 V
Max screen voltage: 200 V
Max plate dissipation: 10 W

Section 2

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Section 3

Diode

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this 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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Typical Plate Voltage
160 V
Typical Screen Voltage
175 V
Power Output
3.75 W

Capacitance

Anode Earth Capacitance
9.25 pF
Grid Earth Capacitance
18 pF
Anode Grid Capacitance
1.1 pF

SECTION 2

Diode

Capacitance

Diode1 Earth Capacitance
4 pF
Diode2 Earth Capacitance
4 pF
Diode1Diode2Capacitance
0.1 pF