Tube-number record
7553
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BrandRCA
ClassHigh-Mu Triode
BasePlanar / disc seal
Filament6.3 V @ 225 mA
Construction
Primary TypeTriode
EnvelopeCeramic-Metal
Sections1
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.5 W
Cathode Current25 mA
H-C Voltage50 V
Audio Performance
Key Features
- Fast warm-up time
- Sturdy coaxial-electrode structure
- Low-noise amplifier
- Ceramic-metal pencil type
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 125 V | 13000 | 6150 | 80 | 12.5 mA |
| RF Amplifier - Cathode-Drive Service | 125 V | — | — | — | 12.5 mA |
Application Notes
For use as a low-noise amplifier tube in receiver applications up to 1000 Mc. Connections to cathode, grid flange, and plate cylinder should be made by flexible spring contacts.
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