Alternatives & variations Download PDF datasheet

AC2PEN

Mazda indirectly heated AC-mains output pentode designed for receiver power-output service. Manufacturer documentation provides ratings, characteristics, and application guidance for conventional low-frequency load-driving operation.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: M7A
Base pins: 7
Nominal heater: 4 V / 1.75 A

Description

Indirectly heated A.C. mains output pentode. 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: 1.75 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: 0.008 S
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 10 W

Indirectly heated A.C. mains output pentode.

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
250 V
Screen voltage
250 V
Grid bias
-5.3 V
Anode current
32 mA
Screen current
6 mA
Optimum load resistance
6700 ohm
Self-bias resistance
140 ohm
Maximum undistorted power output
3.5 W
Input swing RMS
3.2 V