4043-A / 4043-B
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BrandStandard Telephones and Cables
ClassTriode
Base4043-A: American medium 4-pin; 4043-B: Standard British 4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Sections1
Filament / Heater
MaterialOxide coated
Absolute Maximum Ratings
Plate Voltage600 V
Plate Dissipation35 W
Cathode Current110 mA
Audio Performance
Power Output60 W
Key Features
- Oxide coated filament
- Constant voltage type filament
- Directly heated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Constants @ 50mA Anode Current | - | 2285.7 | 3500 | 8 | 50mA |
| Class B A.F. Amp. and Mod. (Zero Signal) | 600V | - | - | - | 12mA |
| Class B A.F. Amp. and Mod. (Max Signal) | 600V | - | - | - | 90mA |
| Class B Telephony (Modulated Carrier) | 600V | - | - | - | 87mA |
| Class C Telephony (Anode Modulation) | 400V | - | - | - | 131mA |
| Class C Telegraphy (Unmodulated) | 600V | - | - | - | 130mA |
Application Notes
For replacement purposes only. Replaced by 4043-C and 4043-D valves.
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