7264
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BrandRCA
ClassMultiplier Phototube
BaseAlden No. 220FT with 20 contacts
FilamentV @ mA
Construction
Primary Type14-Stage Head-On Photomultiplier
EnvelopeT16
Base MaterialSmall-Shell Bidecal 20-Pin (JETEC No.B20-102)
Sections14 dynode stages
Filament / Heater
Absolute Maximum Ratings
Plate Voltage2800 V
Grid 2 Voltage500 V
Grid 1 Voltage400 V
Cathode Current2 mA
Audio Performance
Key Features
- 14-Stage dynode structure
- Head-on type
- Spherical faceplate
- Semitransparent photocathode
- S-11 spectral response
- Very short time-resolution capability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Very-Low-Light-Level (Column A) | 2000V | - | - | 12500000 | - |
| High-Output-Pulse (Column B) | 2800V | - | - | 12500000 | - |
Application Notes
Average anode current should be kept well below 2 mA for stability; recommended to stay below 250 microamperes for maximum stability. Exposure to strong UV may increase dark current.
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