Tube-number record
4557
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BrandRCA
ClassDisplay Cathode-Ray Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
Envelope12-inch Rectangular
Sections1
Filament / Heater
Heater NotesOperating range: 5.7 to 6.9 V
Absolute Maximum Ratings
Plate Voltage16000 V
Grid 2 Voltage400 V
Grid 1 Voltage-80 V
H-C Voltage180 V
Audio Performance
Key Features
- 12-inch Rectangular Faceplate
- Integral Protective Window
- 70-degree Magnetic Deflection
- Electrostatic Focus
- Aluminized Screen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Recommended | 12000 V | — | — | — | 0.1 mA |
Application Notes
For maximum cathode life, it is recommended that the heater supply be regulated at 6.3 volts. Shielding for X-radiation may be needed for anode voltages as high as 16,000V.
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