Tube-number record
3A/107A
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BrandStandard Telephones and Cables
ClassRepeater Triode
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Filament / Heater
MaterialOxide-coated
Absolute Maximum Ratings
Plate Voltage190 V
Audio Performance
Key Features
- Oxide-coated filament
- Directly heated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Repeater Service | 130 V | 1272.7 | 5500 | 7 | — |
Application Notes
3A/107A is for replacement purposes only.
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