UR3C

Indirectly heated full-wave rectifier with two diode sections and a 200 mA series heater for transformerless AC/DC amplifiers and receivers.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 2
Base: -
Socket code: -
Base pins: -
Nominal heater: 30 V / 200 mA

Description

Indirectly heated full-wave rectifier with two diode sections and a 200 mA series heater for AC/DC amplifiers and receivers.

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: 30 V
Nominal heater current: 200 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

2 physical sections, each with unique specifications.

Section 1

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 120 mA
Rectifier max heater-cathode voltage: 350 V
Rectifier warm-up time: 75 s

Promoted values are mapped from the supplied datasheet; additional published ratings, characteristics, capacitances and operating points are retained in TUBE_SECTION_PARAMETER.

Section 2

Rectifier

X-ray radiationInterelectrode capacitances

Rectifier nominal output current: 120 mA
Rectifier max heater-cathode voltage: 350 V
Rectifier warm-up time: 75 s

Second physical rectifier section; electrical properties populated from applicable published ratings.

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

1963 Mullard

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

RMS anode voltage per plate maximum
250 V
FullWave;2x250V
Rectified current maximum
120 mA
FullWave
Heater-to-cathode voltage maximum
350 V
Reservoir capacitance
8 uF
SeriesResistancePerAnode=50Ohm
Reservoir capacitance
16 uF
SeriesResistancePerAnode=75Ohm
Reservoir capacitance
32 uF
SeriesResistancePerAnode=125Ohm

Characteristics

Heating time
75 s

SECTION 2

Rectifier

Other

RMS anode voltage per plate maximum
250 V
FullWave;2x250V
Rectified current maximum
120 mA
FullWave
Heater-to-cathode voltage maximum
350 V
Reservoir capacitance
8 uF
SeriesResistancePerAnode=50Ohm
Reservoir capacitance
16 uF
SeriesResistancePerAnode=75Ohm
Reservoir capacitance
32 uF
SeriesResistancePerAnode=125Ohm

Characteristics

Heating time
75 s