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Tube Tinker — Electron Tube Database
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Rectifier - Damper Diode ·Rectifier

12BR3

Indirectly heated high-current television damper diode, electrically equivalent to 6BR3 except heater rating. Its controlled-warm-up construction is intended for horizontal-deflection energy-recovery service.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
E9-11
Socket code
B9A
Base pins
9
Nominal heater
12.6 V / 600 mA

Description

Electrically identical to 6BR3 except heater rating; controlled heater warm-up.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base
E9-11
Socket code
B9A
Base pins
9
Nominal heater voltage
12.6 V
Nominal heater current
600 mA
Parallel heater voltage
-
Parallel heater current
-
Series capable
No

E9-11 - 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
Max plate dissipation
6.5 W
Rectifier peak inverse voltage
5500 V
Rectifier nominal output current
200 mA
Rectifier peak forward current
1.2 A

Same electrical ratings as 6BR3 except heater rating.

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

1982 Toshiba

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

  • Peak Inverse Plate Voltage

    5500 V

    TVDamperService

  • Peak Plate Current

    1.2 A

    TVDamperService

  • DC Plate Current

    200 mA

    TVDamperService

  • Plate Dissipation

    6.5 W

    TVDamperService

Characteristics

  • Tube Voltage Drop

    19 V

    Ib=250mA DC

Capacitance

  • Heater-Cathode Capacitance

    3 pF

  • Cathode-to-Plate-and-Heater Capacitance

    10.5 pF

  • Plate-to-Cathode-and-Heater Capacitance

    8.5 pF