Tube-number record
K1664
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BrandDu Mont
ClassMultiplier Phototube
BaseFlexible / flying leads
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections10-stage
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1300 V
Plate Dissipation0.5 W
Grid 2 Voltage125 V
Grid 1 Voltage250 V
Cathode Current0.01 mA
Audio Performance
Key Features
- 10-stage multiplier
- Flat end-window
- S-11 response
- Silver magnesium dynodes
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| 105 volts/stage | 1050 V | — | — | 150000 | — |
Application Notes
The cathode current must be kept well below the maximum rating to satisfy anode current limits. Response ceases to be linear at peak cathode current due to resistance.
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