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N727

Marconi beam-output tetrode equivalent to 6AQ5 for compact audio power service, suitable for Class-A and push-pull output stages in radio and general audio equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 6.3 V / 450 mA

Description

The Marconi N727 is a beam output tetrode equivalent to 6aq5 for audio power service.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
Base pins: 7
Nominal heater voltage: 6.3 V
Nominal heater current: 450 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

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 52000 Ω
Transconductance: 0.0041 S
Amplification factor: 10
Max plate voltage: 250 V
Max screen voltage: 250 V
Max plate dissipation: 12 W
Max screen dissipation: 2 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

1955 Marconi

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Other

Heater voltage
6.3 V
Heater current
450 mA
Maximum plate voltage
250 V
Maximum screen voltage
250 V
Maximum plate dissipation
12 W
Maximum screen dissipation
2 W
Triode-connected dissipation
14 W
TriodeConnection

Application

Primary application
Beam output tetrode equivalent to 6AQ5 for audio power service.