Tube-number record
3DP1-A
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BrandRCA
ClassCathode-Ray Tube
BaseDiheptal
Filament6.3 V @ 0.6 mA
Construction
Primary TypeOther / special
Envelope3-Inch Bulb
Base MaterialMedium Shell
SectionsSingle beam with radial deflection electrode
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage2200 V
Grid 2 Voltage2200 V
Grid 1 Voltage-125 V
H-C Voltage200 V
Audio Performance
Key Features
- Radial-deflecting electrode
- High-vacuum
- Electrostatic focus
- Electrostatic deflection
- Improved electron gun
- Greenish hue fluorescent screen
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 1500V Operation | 1500 V | — | — | — | — |
| 2000V Operation | 2000 V | — | — | — | — |
Application Notes
The radial-deflecting electrode allows for polar coordinate observation. Designed so anode No. 1 takes essentially no current to allow bleeder systems requiring very little current.
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