ACPEN

Mazda AC-mains output pentode designed for receiver power stages. Manufacturer data provide electrical ratings, characteristics, and application guidance for conventional audio-frequency output service.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: M7A
Base pins: 7
Nominal heater: 4 V / 1 A

Description

A.C. mains output pentode for receiver output service. The datasheet provides ratings, characteristics and application guidance for the intended service.

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: 4 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: 0.0025 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 8 W

A.C. mains output pentode for receiver output service.

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
200 V
Screen voltage
200 V
Anode current
24 mA
Self-bias resistance
300 ohm
Optimum load
8000 ohm
Power output
2 W
Input swing RMS
8 V