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Voltage - Triode (single) ·Triode

WD11

Raytheon directly heated low-voltage triode for detector or amplifier service in battery-operated equipment.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
UV4
Base pins
4
Nominal heater
1.1 V / 250 mA

Description

WD11 is a Raytheon directly heated triode intended for detector or amplifier service.

Socket description

WD/UV 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
UV4
Base pins
4
Nominal heater voltage
1.1 V
Nominal heater current
250 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
15000 Ω
Transconductance
0.00044 S
Amplification factor
6.6
Max plate voltage
135 V

Published Class-A, detector-service and interelectrode-capacitance data reviewed.

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

    1.1 V

    Published filament rating

  • Filament current

    250 mA

    Published filament rating

  • Plate resistance

    15000 ohm

    ClassA

  • Transconductance

    440 µS

    ClassA

  • Amplification factor

    6.6

    ClassA

Other

  • Maximum plate voltage

    135 V

    Published datasheet rating

  • Plate voltage

    135 V

    ClassA

  • Control-grid bias

    10.5 V

    ClassA

  • Plate current

    3 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