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Voltage Pentode ·Pentode

95108

Philips directly heated subminiature transmitting pentode designed for radiosondes. It can operate as a pentode or triode-connected oscillator around 30 MHz, combining compact RF transmission with specialized airborne meteorological service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
Subminiature
Socket code
SUBMINIATURE6
Base pins
6
Nominal heater
1.25 V / 45 mA

Description

Philips 95108 is a directly heated subminiature transmitting pentode designed for radiosondes. It is specified both as a pentode and in triode-connected oscillator service around 30 MHz.

Socket description

Subminiature 6-lead base

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
Subminiature
Socket code
SUBMINIATURE6
Base pins
6
Nominal heater voltage
1.25 V
Nominal heater current
45 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

Subminiature - 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
750000 Ω
Transconductance
0.00065 S
Max plate voltage
120 V
Max screen voltage
120 V
Max cathode current
16 mA

Published ratings and characteristics promoted where semantically applicable; additional values retained as section 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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

Pentode

Characteristics

  • Typical anode voltage

    45 V

    Published datasheet value

  • Typical screen voltage

    45 V

    Published datasheet value

  • Typical control-grid voltage

    -2.75 V

    Published datasheet value

  • Typical anode current

    0.875 mA

    Published datasheet value

  • Typical screen current

    0.2 mA

    Published datasheet value

  • Amplification factor equivalent

    9.3

    Published datasheet value

  • Anode capacitance

    2.1 pF

    Published datasheet value

  • Grid capacitance

    2.8 pF

    Published datasheet value

  • Anode-grid capacitance

    - to 0.15 pF

    Published datasheet value

  • Life expectancy

    5 h

    Published datasheet value

Other

  • Triode-connected oscillator frequency

    30 MHz

    TriodeConnection

  • Triode-connected oscillator plate voltage

    120 V

    TriodeConnection

  • Triode-connected oscillator plate current

    15 mA

    TriodeConnection

  • RF output power

    750 mW

    TriodeConnection