3BW2

High-voltage television damper diode for horizontal-deflection circuits, combining very high inverse-voltage capability with low average current for repetitive sweep pulses.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 12HY
Socket code: IO
Base pins: 12
Nominal heater: 3.15 V / 480 mA

Description

3BW2 is a DamperDiode 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

International Octal

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 12HY
Socket code: IO
Base pins: 12
Nominal heater voltage: 3.15 V
Nominal heater current: 480 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

12HY - 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: 38000 V
Rectifier nominal output current: 2.2 mA
Rectifier peak forward current: 110 mA
Rectifier forward voltage drop: 70 V

Promoted from printed flyback-rectifier maximum ratings and average characteristics.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Peak inverse voltage, DC component
30000 V
FlybackRectifierService
Heater voltage absolute maximum
3.65 V
Heater voltage absolute minimum
2.65 V
X-radiation output maximum
25 mR/hr
At published maximum-rated operating conditions

Capacitance

Plate to heater/cathode/internal shield capacitance
1.6 pF

Data set 02

1971 RCA HB3 Binder 4 of 7

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Characteristics

Designed to minimize X-Radiation — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Designed to minimize X-Radiation — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage, ac or do — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage, ac or do — published value 2
3.15 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage, ac or do — published value 3
0.5 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Current at Eh = 3.15 V — published value 1
3.15 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Current at Eh = 3.15 V — published value 2
0.48 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Directlnterelectrode Capacitance:a
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Plate Current (ib) = 7 mA — published value 1
7 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Plate Current (ib) = 7 mA — published value 2
70 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Inverse Plate Voltaged
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute min.) — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute min.) — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute min.) — published value 3
2.65 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
a Measured without external shield in accordance with the current — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
a Measured without external shield in accordance with the current — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
b As defined in the current issue of EIA Standazd RS-239A — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
b As defined in the current issue of EIA Standazd RS-239A — published value 2
-239
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
d This rating is applicable when the duration of the voltage pulse — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
d This rating is applicable when the duration of the voltage pulse — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
d This rating is applicable when the duration of the voltage pulse — published value 3
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Measurement of Heater Voltage. It is recommended that a — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Measurement of Heater Voltage. It is recommended that a — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Measurement of Heater Voltage. It is recommended that a — published value 3
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
thermocouple rms voltmeter be used to measure heater — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
thermocouple rms voltmeter be used to measure heater — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
thermocouple rms voltmeter be used to measure heater — published value 3
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
voltage. The meter and its leads must be insulated to — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
voltage. The meter and its leads must be insulated to — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
circuit during this measurement, stray capacitances to ground — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
circuit during this measurement, stray capacitances to ground — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation Characteristic
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
changes in the X-radiation characteristic of the tube. Equip — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
changes in the X-radiation characteristic of the tube. Equip — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation from Receiving Tubes", and controlled in — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation from Receiving Tubes", and controlled in — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation from Receiving Tubes", and controlled in — published value 3
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
mended Practice for Quality Control of X-Radiation Emitted — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
mended Practice for Quality Control of X-Radiation Emitted — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
mended Practice for Quality Control of X-Radiation Emitted — published value 3
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
from High Voltage Rectifier and Shunt Regulator Receiving — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
from High Voltage Rectifier and Shunt Regulator Receiving — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
from High Voltage Rectifier and Shunt Regulator Receiving — published value 3
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages associated with the 3BW2 result in — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages associated with the 3BW2 result in — published value 2
3 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages associated with the 3BW2 result in — published value 3
2 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
production of X-Radiation which may constitute a health — published value 1
0 mA
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
production of X-Radiation which may constitute a health — published value 2
0 mA
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
production of X-Radiation which may constitute a health — published value 3
0 mA
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages at which the 3BW2 is operated can be — published value 1
3 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages at which the 3BW2 is operated can be — published value 2
2 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
The high voltages at which the 3BW2 is operated can be — published value 3
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
adjustment of, any high voltage circuit — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
adjustment of, any high voltage circuit — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
voltage output terminal is properly grounded while inserting — published value 1
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
voltage output terminal is properly grounded while inserting — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
voltage output terminal is properly grounded while inserting — published value 3
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 1 -Heater, Cathode, Internal Shield — published value 1
1
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 1 -Heater, Cathode, Internal Shield — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 2 -Heater, Cathode, Internal Shield — published value 1
2
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 2 -Heater, Cathode, Internal Shield — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 5 •Heater, Cathode, Internal Shield — published value 1
5
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 5 •Heater, Cathode, Internal Shield — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 8 •Heater
8
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 9 -Heater, Cathode, Internal Shield — published value 1
9
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 9 -Heater, Cathode, Internal Shield — published value 2
0
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Pin 12 -Heater
12
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Instantaneous tube voltage drop
70 V
Explicitly published rectifier rating/characteristic.

Other

MAXIMUM RATINGSb —High Voltage Rectifier
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute max.) — published value 1
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute max.) — published value 2
0 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Heater Voltage (absolute max.) — published value 3
3.65 V
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation, Maximum — published value 1
0 mA
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
X-Radiation, Maximum — published value 2
25 mA
Published datasheet value; multiple numbers on a row represent separate source limits or conditions.
Peak inverse plate voltage
38000 V
Explicitly published rectifier rating/characteristic.
Peak plate current
110 mA
Explicitly published rectifier rating/characteristic.
Average plate current
2.2 mA
Explicitly published rectifier rating/characteristic.

Data set 03

1975 RCA RC30

Published operating points and test conditions from this source.

SECTION 1

Rectifier

Other

Heater Voltage (ac/dc)
3.15 V
Heater Voltage (ac/dc) 3.15 volts
Heater Current
480 mA
Heater Current 0.48 ampere
Peak Plate Current
110 mA
Peak Plate Current 110 mA
Average Plate Current
2.2 mA
Average Plate Current 2.2 mA
Tube Voltage Drop (Approx.), for plate current of
7 mA
Tube Voltage Drop (Approx.), for plate current of 7 mA 70 volts
Heater Voltage (ac)
3.6 V
Heater Voltage (ac) 3.6 volts
Heater Current
225 mA
Heater Current 0.225 ampere
Peak Plate Current
100 mA
Peak Plate Current 100 mA
Average Plate Current
2 mA
Average Plate Current 2 mA
Tube Voltage Drop for plate current of
11 mA
Tube Voltage Drop for plate current of 11 mA 60 volts
Peak inverse plate voltage
38000 V
Published rectifier rating
Average output/plate current
2.2 mA
Published rectifier operating/rating value

Characteristic

Heater voltage
3.15 V
Rated heater/filament condition
Tube voltage drop
70 V
Published instantaneous characteristic