Tube-number record
5FP7-A
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BrandRCA
ClassOscillograph Tube
BaseOctal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage8000 V
Plate Dissipation6 W
Grid 2 Voltage700 V
Grid 1 Voltage-180 V
H-C Voltage125 V
Audio Performance
Key Features
- Long-persistence
- Cascade two-layer screen
- Magnetic focus
- Magnetic deflection
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 4000 V | — | — | — | — |
| Typical Operation 2 | 7000 V | — | — | — | — |
Application Notes
The 5FP7-A is particularly useful where either low-speed non-recurring phenomena or high-speed recurring phenomena are to be observed. Operation below 4000 volts will not give persistence of useable brightness.
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