Tube-number record
9C25
0 archive entries
BrandRCA
ClassPower Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeForced-Air Cooled Metal-Glass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage11500 V
Plate Dissipation17500 W
Grid 1 Voltage-2000 V
Cathode Current4000 mA
Audio Performance
Power Output50000 W
Key Features
- Forced-air cooled
- Grounded-grid type
- Flanged-header grid terminal
- Multistrand thoriated tungsten filament
- External radiator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Power Amplifier & Modulator - Class B (2 tubes) | 10500 V | — | — | 32 | 3500 mA |
| RF Power Amplifier - Class B Telephony (Grounded-Filament) | 10000 V | — | — | 32 | 2050 mA |
| RF Power Amplifier & Oscillator - Class C Telegraphy | 11000 V | — | — |
Application Notes
Designed for communication and industrial service. Effectively isolates the filament from the plate circuit in grounded-grid circuits, generally making neutralization unnecessary.
Datasheets
Datasheet: 9C25.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
0 results