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Voltage - Triode (single) ·Triode

V99

General-purpose directly heated detector and amplifier triode.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
4E
Socket code
UV99
Base pins
4
Nominal heater
3.3 V / 63 mA

Description

General-purpose detector and amplifier triode; French source translated to English.

Socket description

Bayonet base family 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
4E
Socket code
UV99
Base pins
4
Nominal heater voltage
3.3 V
Nominal heater current
63 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

4E - 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
15500 Ω
Transconductance
0.000425 S
Amplification factor
6.6
Max plate voltage
120 V

Low-mu Class A triode.

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

1937 Raytheon Radio Receiving Tubes

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • Filament voltage

    3 V

    Published filament rating

  • Filament current

    60 mA

    Published filament rating

  • Plate resistance

    15500 ohm

    ClassA

  • Transconductance

    425 µS

    ClassA

  • Amplification factor

    6.6

    ClassA

Other

  • Maximum plate voltage

    120 V

    Published datasheet rating

  • Plate voltage

    90 V

    ClassA

  • Control-grid bias

    4.5 V

    ClassA

  • Plate current

    2.5 mA

    ClassA

  • Biased-detector plate voltage

    80 V

    BiasedDetector

  • Biased-detector grid bias

    10.5 V

    BiasedDetector

  • Biased-detector no-signal plate current

    0.2 mA

    BiasedDetector

  • Grid-leak detector plate voltage

    45 V

    GridLeakDetector

  • Grid-leak resistance minimum

    0.25 MOhm

    GridLeakDetector

  • Grid-leak resistance maximum

    5 MOhm

    GridLeakDetector

  • Grid condenser

    0.00025 uF

    GridLeakDetector

Capacitance

  • Input capacitance

    2.5 pF

    Published capacitance

  • Output capacitance

    2.5 pF

    Published capacitance

  • Grid-to-plate capacitance

    3.3 pF

    Published capacitance

Data set 02

1940 RCA

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristics

  • Transconductance

    425 µS

    Published

  • Amplification factor

    6.6

    Published

  • Plate resistance

    15500 ohm

    Published

  • Filament voltage

    3 to 3.3 V

    Published operating range

  • Filament current

    60 mA to 63 mA

    Published operating range

Capacitance

  • Grid-to-plate capacitance

    3.3 pF

    Published

  • Grid-to-filament capacitance

    2.5 pF

    Published

  • Plate-to-filament capacitance

    2.5 pF

    Published

Data set 03

1950 Sylvania

Published operating points and test conditions from this source.

SECTION 1

Triode

Characteristic

  • HeaterOrFilamentVoltage

    3.15 V

  • HeaterOrFilamentCurrent

    61.5 mA

Data set 04

195X General Electric Essential Characteristics

Published operating points and test conditions from this source.

SECTION 1

Triode

Capacitance

  • Input capacitance

    2.5 pF

  • Output capacitance

    2.5 pF

  • Grid-to-plate capacitance

    3.3 pF

Other

  • Plate voltage

    90 V

    ClassA

  • Grid voltage

    -4.5 V

    ClassA

  • Plate current

    2.5 mA

    ClassA

Characteristic

  • Plate resistance

    15500 ohm

    ClassA

  • Transconductance

    425 uS

    ClassA

  • Amplification factor

    6.6

    ClassA