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Voltage Pentode or Tetrode (under 100V) ·Pentode

CK5910

Directly heated subminiature pentode designed specifically for low-power radiosonde electronic service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
8YA
Socket code
-
Base pins
8
Nominal heater
1.4 V / 50 mA

Description

Pentode intended for radiosonde service at low heater power.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
8YA
Socket code
-
Base pins
8
Nominal heater voltage
1.4 V
Nominal heater current
50 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

8YA - 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

Pentode

X-ray radiationInterelectrode capacitances
Plate resistance
1500000 Ω
Transconductance
0.0009 S
Max plate voltage
90 V
Max screen voltage
90 V

Promoted only from clearly identified printed electrical values; additional values retained in TUBE_SECTION_PARAMETER.

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

195X Raytheon Special Purpose Tubes

Published operating points and test conditions from this source.

SECTION 1

Pentode

Other

  • Plate voltage

    90 V

    Radiosonde

  • Control-grid voltage

    0 V

    Radiosonde

  • Screen voltage

    90 V

    Radiosonde

  • Plate current

    1.6 mA

    Radiosonde

  • Screen current

    0.45 mA

    Radiosonde

Characteristic

  • Plate resistance

    1.5 MΩ

    Radiosonde

  • Transconductance

    900 µS

    Radiosonde