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E406N

Philips directly heated audio power triode for Class A and push-pull Class AB output stages. Published operation provides about 5.3 W single-ended or roughly 15 W from a fixed-bias push-pull pair.

Directly heatedCold cathodeCommon cathodeDissimilar

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

Description

E406N is a Triode device in the supplied Philips literature. Philips directly heated power triode with Class-A and Class-AB operating data.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
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

Triode

X-ray radiationInterelectrode capacitances

Transconductance: 0.003 S
Max plate dissipation: 12 W

Philips directly heated power triode with Class-A and Class-AB operating data.

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

1938 Philips Miniwatt Vacuum Tube Catalog

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

Plate voltage
500 V
ClassA; OneTube
Quiescent plate current
24 mA
ClassA; OneTube
Grid bias
-68 V
ClassA; OneTube
Optimum load resistance
11500 ohm
ClassA
Power output
5.3 W
ClassA
Distortion
5 %
ClassA
Grid AC voltage
45 V RMS
ClassA
Maximum anode dissipation
12 W
Plate voltage
500 V
ClassAB; PushPull; TwoTubes; FixedBias
Quiescent plate current per tube
24 mA
ClassAB; PushPull; TwoTubes; FixedBias
Plate current at full modulation per tube
38 mA
ClassAB; PushPull; TwoTubes; FixedBias
Grid bias
-70 V
ClassAB; PushPull; TwoTubes; FixedBias
Load resistance plate-to-plate
12000 ohm
ClassAB; PushPull; TwoTubes; FixedBias
Power output
15 W
ClassAB; PushPull; TwoTubes; FixedBias
Plate voltage
500 V
ClassAB; PushPull; TwoTubes; CathodeBias
Quiescent plate current per tube
24 mA
ClassAB; PushPull; TwoTubes; CathodeBias
Plate current at full modulation per tube
27 mA
ClassAB; PushPull; TwoTubes; CathodeBias
Common cathode resistor
1400 ohm
ClassAB; PushPull; TwoTubes; CathodeBias
Load resistance plate-to-plate
16000 ohm
ClassAB; PushPull; TwoTubes; CathodeBias
Power output
13 W
ClassAB; PushPull; TwoTubes; CathodeBias

Characteristic

Transconductance
3 mA/V
ClassA
Internal resistance
2000 ohm
ClassA