PP3521

Indirectly heated very-low-impedance output triode for AC/DC mains receivers requiring comparatively high audio power. High transconductance and strong current capability support useful single-ended or push-pull loudspeaker output.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: 7
Nominal heater: 35 V / 200 mA

Description

Indirectly heated, very-low-impedance output triode for the output stage of AC/DC mains receivers where comparatively large audio power is required.

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: 35 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

1 physical section, each with unique specifications.

Section 1

Triode

X-ray radiationInterelectrode capacitances

Plate resistance: 600 Ω
Transconductance: 0.01 S
Amplification factor: 6
Max plate voltage: 250 V
Max plate dissipation: 5 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

1960 Mazda

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Anode voltage
200 V
Single
Anode current
70 mA
Single
Optimum load
2000 ohm
Single
Power output
2.3 W
Single
Anode voltage
200 V
PushPull
Anode current
140 mA
PushPull
Optimum anode-to-anode load
2500 ohm
PushPull
Power output
6 W
PushPull