Tube-number record
6953
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BrandRCA
ClassGas Phototube
BaseOctal
Construction
Primary TypeOther / special
EnvelopeT9
Base MaterialIntermediate-Shell
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage90 V
Cathode Current0.006 mA
Audio Performance
Key Features
- Side-on type
- Unobstructed photocathode area
- Semicylindrical cathode
- S-1 response
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Median Luminous Sensitivity | 90 V | — | — | — | 0.2 mA |
Application Notes
Light source is typically a tungsten-filament lamp operated at 2870 K. Gas amplification factor is the ratio of luminous sensitivity at 90V to that at 25V.
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