Data set 01
1971 RCA HB3 Binder 5 of 7
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Peak Inverse Voltage
5000 V
DC Output Current
175 mA
Peak Forward Current
800 mA
Maximum Heater-Cathode Voltage
900 V
Rectifier - Damper Diode ·Rectifier
25CT3
Television damper rectifier rated for approximately 5 kV peak inverse voltage and 1.2 A peak current, providing energy recovery in horizontal-deflection circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 25 V / 300 mA
Description
Half-wave vacuum rectifier used as a damper tube in horizontal-deflection circuits of television receivers.
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
- 25 V
- Nominal heater current
- 300 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
- Max plate dissipation
- 4.75 W
- Rectifier peak inverse voltage
- 5000 V
- Rectifier nominal output current
- 250 mA
- Rectifier peak forward current
- 1.2 A
- Rectifier forward voltage drop
- 16 V
- Rectifier max heater-cathode voltage
- 900 V
- Rectifier warm-up time
- 11 s
damper rectifier
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 02
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Heater Warm-up Time {Average)
11 s
Other;PublishedValue1
Heater Warm-up Time {Average)
11 s
Other;PublishedValue2
Heater Warm-up Time {Average)
11 s
Other;PublishedValue3
Peak Inverse Plate Voltage*
5000 V
MaximumRating
Peak Plate Current
1200 mA
MaximumRating
Average Plate Current
250 mA
MaximumRating
Plate Dissipation
4.75 W
MaximumRating
Peak value
800 V
MaximumRating;PublishedValue1
Peak value
-5000 V
MaximumRating;PublishedValue2
Average value -(
-100 V
MaximumRating;PublishedValue1
Average value -(
-900 V
MaximumRating;PublishedValue2
Peak Inverse Plate Voltage
5000 V
Section1;Promoted
Peak Plate Current
1.2 A
Section1;Promoted
Capacitance
Plate to Cathode and Heater
12 pF
Capacitance
Cathode to Plate and Heater
9.5 pF
Capacitance
Heater to Cathode
2.8 pF
Capacitance
Characteristic
Tube Voltage Drop for plate current of
350 mA
Characteristic;PublishedValue1
Tube Voltage Drop for plate current of
16 mA
Characteristic;PublishedValue2