Power - TV Horizontal Output (sweep) ·BeamPower
Beam-power television deflection tube with high positive and negative pulse-voltage ratings explicitly tied to the horizontal scanning cycle.
21KA6 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
Functional section details are deferred by supplied sheet to 16KA5.
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.
Heater Voltage
21 V
Heater Current
450 mA
Heater Warm-up Time
11 s
Electrical Characteristics Reference
16KA5 text
SuppliedSheetStatesSimilarExceptHeaterCharacteristics
Data set 02
Published operating points and test conditions from this source.
Heater Voltage
21 V
Heater Voltage 21 volts
Heater Current
460 mA
Heater Current 0.46 ampere
Heater Warm-up Time
11 s
Heater Warm-up Time 11 seconds
DC Plate Supply Voltage
770 V
DC 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
Grid-No.3 Voltage, Positive-bias value
70 V
Grid-No.3 Voltage, Positive-bias value 70 volts
Grid-No.2 Voltage
220 V
Grid-No.2 Voltage 220 volts
Grid-No.l Voltage, Negative-bias value
65 V
Grid-No.l Voltage, Negative-bias value 65 volts
Peak Negative-Pulse Grid-No.l Voltage
330 V
Peak Negative-Pulse Grid-No.l Voltage 330 volts
Average Cathode Current
230 mA
Average Cathode Current 230 mA
Peak Cathode Current
800 mA
Peak Cathode Current 800 mA
Plate Dissipation
18 W
Plate Dissipation 18 watts
Grid-No.2 Input
3.6 W
Grid-No.2 Input 3.6 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).
Heater Voltage 21.5
29 V
Heater Voltage 21.5 29 volts
Heater Current 0.45
300 mA
Heater Current 0.45 0.3 ampere
Maximum plate/supply voltage
770 V
Published section value
Maximum screen-grid voltage
770 V
Published section value
Plate Voltage 6000 60 60
130 V
Plate Voltage 6000 60 60 130 volts
Voltage 0 0 25
0 V
Voltage 0 0 25 0 volts
Grid-No.2 (Screen-Grid) Voltage 130 130 130
130 V
Grid-No.2 (Screen-Grid) Voltage 130 130 130 130 volts
Grid-No, 1 (Control-Grid) Voltage 0 0 —
20 V
Grid-No, 1 (Control-Grid) Voltage 0 0 —20 volts
Plate Resistance (Approx.) — — —
11000 ohm
Plate Resistance (Approx.) — — — 11000 ohms
plate current of
1 mA
plate current of 1 mA —66 — — —33 volts
Plate resistance
11000 ohm
Published section value
Amplification factor
4.7
Published section value