QP230

Matched high-efficiency double pentode designed for quiescent push-pull audio output in battery receivers, reducing standing current while providing useful loudspeaker power.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: 7
Nominal heater: 2 V / 300 mA

Description

Two accurately matched high-efficiency pentode sections in one envelope for quiescent push-pull audio output operation in battery receivers.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 7
Nominal heater voltage: 2 V
Nominal heater current: 300 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

2 physical sections, each with unique specifications.

Section 1

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.003 S
Max plate voltage: 150 V
Max screen voltage: 150 V

One representative section row for two matched electrically identical pentode sections.

Section 2

Pentode

X-ray radiationInterelectrode capacitances

Transconductance: 0.003 S
Max plate voltage: 150 V
Max screen voltage: 150 V

Second physical pentode section; added to align rows with SectionCount.

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

Pentode

Other

Anode voltage
120 V
PushPull
Screen voltage
120 V
PushPull
Total quiescent anode current
46.5 mA
PushPull
Anode-to-anode load
17000 ohm
PushPull
Power output
0.85 W
PushPull