Tube-number record
CK7570/QK411A
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BrandRaytheon
ClassRecording Storage Tube
BaseDiheptal
Filament6.3 V @ 600 mA
Construction
Primary TypeDisplay / CRT
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notes6.3 V +10%
Absolute Maximum Ratings
Plate Voltage6000 V
Grid 2 Voltage6000 V
Grid 1 Voltage-200 V
H-C Voltage150 V
Audio Performance
Key Features
- Repeating information stored for many hours up to 30,000 times
- Electrostatic focusing
- Electrostatic deflection
- Similar to CK6835/QK464A
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Prime | 5000 V | — | — | — | 0.15 mA |
| Read | 5000 V | — | — | — | 0.002 mA |
| Write | 5000 V | — | — | — | — |
Application Notes
Priming is accomplished by uniformly charging the storage surface. Reading involves using a low cathode current of about 2 uA. Erasing is performed by writing a dc signal into the tube.
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