E418

Early Philips indirectly heated hexode for oscillator-modulator and frequency-changing service. Its multi-grid structure allows oscillator and signal voltages to interact for conversion or modulation in early European receiving equipment.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 4 V / 1.2 A

Description

E418 is a Hexode device in the supplied Philips literature. Philips indirectly heated hexode for oscillator-modulator service.

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: 1.2 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

Hexode

X-ray radiationInterelectrode capacitances

Transconductance: 0.00058 S
Max plate voltage: 200 V
Max screen voltage: 120 V

Philips indirectly heated hexode for oscillator-modulator service.

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

Hexode

Other

Plate voltage
200 V
OscillatorModulator
Plate current
3 mA
OscillatorModulator
Grid 1 bias
-1.5 V
OscillatorModulator
Screen voltage
120 V
OscillatorModulator
Screen current
8.5 mA
OscillatorModulator
Oscillator anode voltage
200 V
OscillatorModulator
Oscillator grid bias
-4 V
OscillatorModulator

Characteristic

Conversion transconductance
0.58 mA/V
OscillatorModulator
Internal resistance
150000 ohm
OscillatorModulator