25DK3

Rectifier — Noval

General Electric

Known Equivalents & Substitutes

No known equivalents. If you know of any, use the ⚑ Report Issue button above.

Electrical Specifications

Absolute Maximum

Anode Dissipation (max)Plate Dissipation (max)9W

Heater-to-Cathode Voltage (max)Peak Heater-Cathode Voltage (heater negative)6,500V

Rectifier

Peak Inverse VoltagePeak Inverse Plate Voltage6,500V

DC Output Current (max)DC Output Current (max)400mA

Peak Anode Current (surge)Steady-State Peak Plate Current1,200mA

Heater

Heater VoltageHeater Voltage25V

Heater CurrentHeater Current0.45A

Notes

General Electric Product Information datasheet, page 3-73. T-9 glass envelope, Base E9-89 (Button 9-Pin), Top Cap C1-2 (skirted miniature). Basing diagram EIA 9SG.
Designed specifically for color TV applications requiring higher PIV than standard B&W damper diodes.
Pin 1 is heater insulation coil. Pin 6 and Pin 8 are internal connections — do not use as tie points. Pin 9 may be used as tie point for components at heater potential.
Heater-cathode voltage: heater positive max 100V DC / 300V total DC and peak; heater negative max 900V DC / 6500V total DC and peak.
Maximum bulb temperature 220 degrees C (measured by infrared thermometer).
Average tube voltage drop: 16V at 400 mA, 25V at 800 mA.
Interelectrode capacitances (without external shield): cathode-to-plate-and-heater 22 pF, plate-to-cathode-and-heater 13.6 pF, heater-to-cathode 1.10 pF.
Heater current 0.45 +/- 0.03 A. Heater warm-up time approximately 11 seconds.

Pin Layout — Noval

1Heater Insulation Coil

2Plate

3No Connection

References