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Rectifier - Half Wave ·Rectifier

UY21

Mullard indirectly heated half-wave rectifier for 100 mA series-heater supplies. Its 50 V heater and moderate current capability suit AC/DC receiver power systems.

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

Description

The Mullard UY21 is an indirectly heated half-wave rectifier for 50 V, 0.1 A series-heater operation, rated for 250 V RMS input and 140 mA output.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
-
Socket code
-
Base pins
-
Nominal heater voltage
50 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

Rectifier

X-ray radiationInterelectrode capacitances
Rectifier nominal output current
140 mA
Rectifier max heater-cathode voltage
550 V

Half-wave rectifier.

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

1951 Mullard Valve and Service Manual

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • RMS Input Voltage

    250 V

  • Reservoir Capacitance

    60 uF

  • Limiting Resistance

    175 ohm

    Input=250V; ReservoirCapacitance=60uF

  • Limiting Resistance

    125 ohm

    Input=250V; ReservoirCapacitance=32uF

  • Limiting Resistance

    75 ohm

    Input=250V; ReservoirCapacitance=16uF

  • Limiting Resistance

    0 ohm

    Input=250V; ReservoirCapacitance=8uF

  • DC Output Voltage

    169 V

    Input=220Vrms; LoadCurrent=140mA; R=125ohm

Data set 02

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Ingangscapaciteit van het afvlakfilter . . . . Cfl‘ = max

    60 pF

    Ingangscapaciteit van het afvlakfilter . . . . Cfl‘ = max. 60 pF