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Power - Triode Single (under 10W) ·Triode

HL22

Low-current high-voltage control triode for regulated high-voltage DC power supplies.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
IO
Base pins
-
Nominal heater
2 V / 100 mA

Description

Low-current high-voltage control triode for regulated high-voltage DC power supplies.

Socket description

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
IO
Base pins
-
Nominal heater voltage
2 V
Nominal heater current
100 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
21000 Ω
Transconductance
0.0015 S
Amplification factor
32
Max plate voltage
150 V
Max plate dissipation
4 W
Max cathode current
0.75 mA

Published Ferranti ratings and characteristics promoted where applicable; additional electrical, pulse, regulator, microwave, and operating data retained as 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

1963 Ferranti

Published operating points and test conditions from this source.

SECTION 1

Triode

Other

  • Peak anode current maximum

    5 mA

  • DC anode current maximum

    0.75 mA

  • Negative grid voltage maximum

    -200 V

  • Grid circuit resistance maximum

    10 Mohm

  • Peak heater-cathode voltage maximum

    150 V

  • Cathode heating time minimum

    45 s

Characteristics

  • Cutoff grid voltage at 15 kV

    -26 V

  • Cutoff grid voltage at 20 kV

    -34 V

  • Cutoff grid voltage at 25 kV

    -42 V

  • Grid voltage for 5 uA at 15 kV

    -21.5 V

  • Grid voltage for 5 uA at 20 kV

    -29 V

  • Grid voltage for 5 uA at 25 kV

    -36 V

Capacitance

  • Anode-cathode capacitance maximum

    0.1 pF

Application

  • Application

    High-voltage stabilizer control valve