Power - TV Horizontal Output (sweep) ·BeamPower
Compactron beam-power pentode designed for television horizontal-deflection amplifier service, with high sweep-pulse voltage capability.
21HB5A is a beam-power tube for television deflection or power-amplifier service. The supplied RCA manual excerpt was reviewed for heater data, physical sections, maximum ratings, electrical characteristics, capacitances, and stated operating conditions.
Duodecar 12-contact
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Promoted characteristics use the published 130 V average-characteristics column; amplification factor is for triode connection. MaxPlateVoltage is the published DC plate-supply design maximum; pulse limits are parameters.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Peak Positive Pulse Plate Voltage
6000 V
HorizontalDeflection
Peak Negative Pulse Plate Voltage
1500 V
HorizontalDeflection
Peak Cathode Current
800 mA
HorizontalDeflection
Heater Warm-up Time
11 s
Plate Current
46 mA
Plate=130V;Screen=130V;Grid1=-20V
Screen Current
1.8 mA
Plate=130V;Screen=130V;Grid1=-20V
Data set 02
Published operating points and test conditions from this source.
0.45; warm-up time (average),
11 s
0.45; warm-up time (average), 11 seconds; maximum
amperes, 0.45; average warm-up time,
11 s
amperes, 0.45; average warm-up time, 11 seconds;
Plate Supply Voltage
770 V
Plate Supply Voltage 770 volts
Peak Positive-Pulse Plate Voltage*
6500 V
Peak Positive-Pulse Plate Voltage* 6500 volts
Peak Negative-Pulse Plate Voltage
1500 V
Peak Negative-Pulse Plate Voltage 1500 volts
DC Grid-No.3 Voltage, Positive-bias value
70 V
DC Grid-No.3 Voltage, Positive-bias value 70 volts
Grid-No.2 Voltage
220 V
Grid-No.2 Voltage 220 volts
DC Grid-No.l Voltage, Negative-bias value
55 V
DC Grid-No.l Voltage, Negative-bias value 55 volts
Peak Negative-Pulse Grid-No.l Voltage
330 V
Peak Negative-Pulse Grid-No.l Voltage 330 volts
Peak Cathode Current
800 mA
Peak Cathode Current 800 mA
Average Cathode Current
230 mA
Average Cathode Current 230 mA
Plate Dissipation*
18 W
Plate Dissipation* 18 watts
Grid-No.2 Input
3.5 W
Grid-No.2 Input 3.5 watts
Grid-No.l-Circuit Resistance
1 Mohm
Grid-No.l-Circuit Resistance 1 megohm
# Pulse duration must not exceed 15% of a horizontal scanning cycle (
10 us
# Pulse duration must not exceed 15% of a horizontal scanning cycle (10 microseconds).
Maximum plate/supply voltage
6500 V
Published section value
Maximum screen-grid voltage
770 V
Published section value
Maximum plate dissipation
18 W
Published section value
Plate Voltage 5000 50 130
130 V
Plate Voltage 5000 50 130 130 volts
Grid-No.2 (Screen-Grid) Voltage 130 130 130
130 V
Grid-No.2 (Screen-Grid) Voltage 130 130 130 130 volt*
Plate Resistance (Appiox.) — —
9900 ohm
Plate Resistance (Appiox.) — — 9900 ohms
plate current of
1 mA
plate current of 1 mA —64 — —32 — volt*
Plate Voltage 13) 5000 50
130 V
Plate Voltage 13) 5000 50 130 volts
Grid-No.2 (Screen-Grid) Voltage — 130 130
130 V
Grid-No.2 (Screen-Grid) Voltage — 130 130 130 volts
Plate Resistance (Approx.) — — —
9900 ohm
Plate Resistance (Approx.) — — — 9900 ohms
Plate Current — — 450
46 mA
Plate Current — — 450 46 mA
Grid-No.2 Current — — 29
1.8 mA
Grid-No.2 Current — — 29 1.8 mA
current of
1 mA
current of 1.0 mA — —64 — —32 volts
Plate resistance
9900 ohm
Published section value
Amplification factor
4.8
Published section value