21FDP4
0 Tubes in archive
BrandRCA
ClassPicture Tube
BaseSmall-Button Neoeightar 7-Pin
Filament6.3V @ 600mA
Construction
Primary TypeCRT
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesControlled Warm-Up Time
Absolute Maximum Ratings
Plate Voltage20000 V
Grid 2 Voltage550 V
Grid 1 Voltage-155 V
H-C Voltage200 V
Audio Performance
Key Features
- Aluminized Screen
- Short Rectangular Glass Type
- No Ion-Trap Magnet Required
- Filterglass Faceplate
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard | 16000V | - | - | - | - |
Application Notes
Heater-cathode voltage max 450V during 15s warm-up; 200V thereafter.
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