Tube-number record
3A/107A
0 archive entries
3A/107A is a tube type in the TubeDatabase archive (class: Repeater Triode). Recorded specifications: brand Standard Telephones and Cables, construction Triode, socket 4-pin, and maximum plate voltage 190 V. The archive does not yet hold a photographed example of this type.
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.
0 results