Data set 01
1968 General Electric Co
Published operating points and test conditions from this source.
SECTION 1
Rectifier
Other
Plate Dissipation
9 W
TVDamperService
Steady-State Peak Plate Current
1200 mA
TVDamperService
Rectifier - Damper Diode ·Rectifier
25DK3
Series-heater television damper diode intended for horizontal-deflection energy recovery, providing high inverse-voltage capability and controlled warm-up for receiver sweep circuits.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- E9-89
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 25 V / 450 mA
Description
The 25DK3 is a heater-cathode diode intended for damping-diode service in color-TV horizontal-deflection circuits and is rated for 6.5 kV peak inverse voltage.
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
- E9-89
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 25 V
- Nominal heater current
- 450 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
E9-89 - 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 cathode current
- 400 mA
- Rectifier peak inverse voltage
- 6500 V
- Rectifier peak forward current
- 1.2 A
TV damping diode. Peak inverse plate voltage 6.5 kV; 1.2-A steady-state peak plate current and 400-mA DC rating retained.
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.