Tube-number record
7664
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BrandAllen B. Du Mont Laboratories, Inc.
ClassMultiplier Phototube
BaseDiheptal
Construction
Primary TypeMulti-section
EnvelopeFused Silica
Base MaterialMedium shell diheptal
Sections10
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1800 V
Plate Dissipation0.5 W
Grid 2 Voltage200 V
Cathode Current0.02 mA
Audio Performance
Key Features
- End-on multiplier phototube
- Ultra-violet sensitive cathode
- Fused silica envelope
- Transmission down to 1800 Angstroms
- Focusing electrode for optimum collection efficiency
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 105 volts/stage | 1050 V | — | — | 215000 | — |
| 150 volts/stage | 1500 V | — | — | 2000000 | — |
Application Notes
The focusing electrode (shield) voltage should be adjusted between cathode and 1st dynode potentials for optimum photoelectron collection efficiency. This is usually several volts more positive than the cathode.
Datasheets
Datasheet: 7664.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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