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Rectifier - Damper Diode ·Rectifier

12CL3

Half-wave vacuum rectifier designed as a damper tube in television horizontal-deflection circuits, recovering sweep energy while withstanding high inverse voltage.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
9
Socket code
-
Base pins
9
Nominal heater
12.6 V / 600 mA

Description

Half-wave vacuum rectifier used as a damper tube in television horizontal-deflection circuits.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
9
Socket code
-
Base pins
9
Nominal heater voltage
12.6 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

9 - 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 peak inverse voltage
5000 V
Rectifier nominal output current
200 mA
Rectifier peak forward current
1.2 A
Rectifier warm-up time
11 s

Promoted from published ratings/characteristics where directly applicable; additional published values retained in TUBE_SECTION_PARAMETER.

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

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristic

  • Tube Voltage Drop for plate current of

    700 mA

    Published in approved 12CL3 target entry; Section1

  • Tube Voltage Drop for plate current of 700 mA

    25 V

    Published in approved 12CL3 target entry; Section1

  • # Pulse duration must not exceed 15% of a horizontal scanning cycle (

    10 microseconds

    Published in approved 12CL3 target entry; Section1

Other

  • Heater Voltage (ac/dc) 6.3

    12.6 V

    Published in approved 12CL3 target entry; Section1

  • Heater Current 1.2

    600 mA

    Published in approved 12CL3 target entry; Section1

  • Heater Warm-up Time (Average)

    11 seconds

    Published in approved 12CL3 target entry; Section1

  • Peak Inverse Plate Voltage#

    5500 V

    Published in approved 12CL3 target entry; Section1

  • Peak Plate Current

    1300 mA

    Published in approved 12CL3 target entry; Section1

  • Average Plate Current

    250 mA

    Published in approved 12CL3 target entry; Section1

  • Plate Dissipation

    8.5 W

    Published in approved 12CL3 target entry; Section1

  • Bulb Temperature (At hottest point)

    220 °C

    Published in approved 12CL3 target entry; Section1

  • Peak value +300

    -5000 V

    Published in approved 12CL3 target entry; Section1

  • Average value -j-100

    -900 V

    Published in approved 12CL3 target entry; Section1

  • Tube Voltage Drop for plate current of

    350 mA

    Published in approved 12CL3 target entry; Section1

  • Tube Voltage Drop for plate current of 350 mA

    16 V

    Published in approved 12CL3 target entry; Section1

  • # Pulse duration must not exceed 15% of a horizontal scanning cycle (

    10 microseconds

    Published in approved 12CL3 target entry; Section1

  • Heater Voltage (ac/dc)

    6.3 V

    Published in approved 12CL3 target entry; Section1

  • Heater Current

    650 mA

    Published in approved 12CL3 target entry; Section1

Capacitance

  • Plate to Cathode and Heater

    6.5 pF

    Published in approved 12CL3 target entry; Section1

  • Cathode to Plate and Heater

    9 pF

    Published in approved 12CL3 target entry; Section1

  • Heater to Cathode

    3 pF

    Published in approved 12CL3 target entry; Section1

  • Grid No.l to Plate

    0.12 pF

    Published in approved 12CL3 target entry; Section1

  • and Internal Shield

    11 pF

    Published in approved 12CL3 target entry; Section1

  • and Internal Shield

    5.5 pF

    Published in approved 12CL3 target entry; Section1