Tube-number record
4438
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BrandRCA
ClassPhotomultiplier Tube
Construction
Primary TypeOther / special
EnvelopeT-12
Base MaterialSemi-flexible leads
Sections10-stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1250 V
Grid 2 Voltage200 V
Grid 1 Voltage300 V
Cathode Current0.75 mA
Audio Performance
Key Features
- Sturdy structure
- 10-Stage
- Head-On Type
- Adverse Environmental Conditions
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| DC Supply Voltage E = 1000V | 1000 V | — | — | 600000 | 0.000016 mA |
Application Notes
The 4438 is supplied with semi-flexible leads. Electrostatic shielding required and must be connected to cathode.
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