Tube-number record
RS 876
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RS 876 is a tube type in the TubeDatabase archive (class: Modulator Triode). Recorded specifications: brand Siemens, construction Triode, maximum plate voltage 14000 V, and maximum plate dissipation 75000 W. The archive does not yet hold a photographed example of this type.
BrandSiemens
ClassModulator Triode
Construction
Primary TypeTriode
EnvelopeGlass/Metal
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage14000 V
Plate Dissipation75000 W
Grid 1 Voltage-2000 V
Cathode Current16000 mA
Audio Performance
Power Output200000 W
Key Features
- Vapor-cooled triode
- Coaxial grid lead-through
- Suitable for modulators of 200 kW to 250 kW transmitters
- Axis vertical, anode down mounting
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class B, push-pull (2 tubes) | 11500 V | 40000 | — | 15 | 14500 mA |
Application Notes
The temperature of the glass-to-metal seals must not exceed 170 °C. Additional air cooling of at least 2 m3/min may be required for tube terminals.
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