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KD50

Very small directly heated triode designed for compact low-power equipment such as hearing aids.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 2 V / 55 mA

Description

Very small directly heated triode for compact equipment such as hearing aids. Published ratings, characteristics, operating data, capacitances, microwave/noise data, or gauge-head data were retained according to the physical device and mapped only to compatible locked-schema fields.

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: 2 V
Nominal heater current: 55 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: 7600 Ω
Transconductance: 0.00063 S
Amplification factor: 4.7
Max plate voltage: 100 V

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 E-Z

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

Plate current
0.5 mA
PlateVoltage=30V
Grid voltage
-1 V
PlateVoltage=30V
Plate resistance
13500 ohm
PlateVoltage=30V
Amplification factor
4.7
PlateVoltage=30V
Transconductance
350 uS
PlateVoltage=30V
Plate current
1.8 mA
PlateVoltage=40V
Grid voltage
-2.8 V
PlateVoltage=40V
Plate resistance
7600 ohm
PlateVoltage=40V
Amplification factor
4.7
PlateVoltage=40V
Transconductance
630 uS
PlateVoltage=40V

Other

Maximum plate voltage
100 V