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A306

General-purpose receiving triode for detection, amplification, oscillator, or low-power electronic service as documented by the manufacturer.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: Philips 4-pin
Socket code: B4
Base pins: 4
Nominal heater: 3 V / 60 mA

Description

Philips A306 is an early directly heated high-vacuum triode for battery receivers. The Dutch datasheet specifies very low filament current, low-voltage operation, and use as detector and amplifier.

Socket description

European 4-pin base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: Philips 4-pin
Socket code: B4
Base pins: 4
Nominal heater voltage: 3 V
Nominal heater current: 60 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Philips 4-pin - 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: 15000 Ω
Transconductance: 0.0004 S
Amplification factor: 6
Max plate voltage: 100 V

Published ratings and characteristics promoted where semantically applicable; additional values retained as section parameters.

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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Filament voltage range
2.7 to 3.3 V
Published datasheet value
Filament current
60 mA
Published datasheet value
Saturation current
10 mA
Published datasheet value
Maximum quiescent current
- to 6 mA
Published datasheet value
Amplification factor
6
Published datasheet value
Maximum transconductance
- to 0.4 mA/V
Published datasheet value
Minimum internal resistance
15000 to - Ω
Published datasheet value

Other

Anode voltage range
20 to 100 V
Published datasheet value