Tube-number record
5FP15-A
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BrandRadio Corporation of America (RCA)
ClassOscillograph Tube
BaseOctal
Filament6.3 V @ 0.6 mA
Construction
Primary TypeDisplay / CRT
EnvelopeD-39-1/2 Clear Glass
Base MaterialMedium Shell Octal 8-Pin
SectionsSingle
Filament / Heater
Heater Notesac or dc volts
Absolute Maximum Ratings
Plate Voltage8000 V
Grid 2 Voltage700 V
Grid 1 Voltage-180 V
H-C Voltage125 V
Audio Performance
Key Features
- Magnetic focusing
- Magnetic deflection
- Spherical faceplate
- P15 Phosphor with Near-Ultraviolet radiation
- Very short persistence
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation (4000V) | 4000 V | — | — | — | — |
| Typical Operation (5000V) | 5000 V | — | — | — | — |
Application Notes
The ultor voltage should not be less than 4000 volts for general application to maintain brilliance and definition. Effective resistance of the ultor supply should limit input power to 6 watts.
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