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Rectifier - TV Line Scan Boost ·Rectifier

3A2A

High-voltage vacuum rectifier for television flyback and picture-tube power supplies. Its specialized pulse-voltage construction supports CRT accelerating-voltage generation.

Directly heatedCold cathodeCommon cathodeDissimilar
Sections
1
Base
-
Socket code
B9A
Base pins
9
Nominal heater
3.15 V / 220 mA

Description

3A2A is a Rectifier vacuum tube documented in the RCA Receiving Tube Manual. The supplied excerpt was reviewed for heater or filament data, physical section arrangement, maximum ratings, electrical characteristics, capacitances, and stated application.

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
-
Socket code
B9A
Base pins
9
Nominal heater voltage
3.15 V
Nominal heater current
220 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 peak inverse voltage
20000 V
Rectifier nominal output current
1.5 mA
Rectifier peak forward current
80 mA
Rectifier forward voltage drop
70 V

Rectifier section; published ratings/characteristics promoted where clearly attributable.

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

Other

  • Heater Voltage (ae/de)

    3.15 V

    Heater Voltage (ae/de) 3.15 volts

  • Heater Current

    220 mA

    Heater Current 0.22 ampere

  • Peak Plate Current

    80 mA

    Peak Plate Current 80 mA

  • Average Plate Current

    1.5 mA

    Average Plate Current 1.5 mA

  • Tube Voltage Drop for plate current of

    7 mA

    Tube Voltage Drop for plate current of 7 mA 70 volts

  • Peak inverse plate voltage

    20000 V

    Published rectifier rating

  • Average output/plate current

    1.5 mA

    Published rectifier operating/rating value

Characteristic

  • Heater voltage

    3.15 V

    Rated heater/filament condition

  • Tube voltage drop

    70 V

    Published instantaneous characteristic