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Tube Tinker — Electron Tube Database
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Voltage - Triode (single high frequency) ·Triode

4HK5

No short description is recorded for this tube.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
4 V / 300 mA

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
300 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
5000 Ω
Transconductance
0.015 S
Amplification factor
75
Max plate voltage
200 V
Max plate dissipation
2.3 W
Max cathode current
22 mA

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

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Plate Voltage

    135 V

  • Grid Voltage

    -1 V

  • Plate Current

    12.5 mA

  • Grid To Plate Capacitance

    0.29 pF

  • Input Capacitance

    4.4 pF

  • Output Capacitance

    2.6 pF