Tube-number record
RS 2021
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BrandSiemens
ClassTransmitting Triode
BaseSpecial / none
Construction
Primary TypeTriode
EnvelopeGlass/Metal
Base MaterialMetal
Sections1
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage15000 V
Plate Dissipation60000 W
Grid 1 Voltage-1000 V
Cathode Current18000 mA
Audio Performance
Key Features
- Disk-shaped grid feed-through
- Available in Air-cooled (L), Water-cooled (W), and Vapor-cooled (V) versions
- Directly heated thoriated tungsten cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| HF Amplifier B (Cathode Base) | 15000 V | 60000 | 1235 | — | 7750 mA |
| HF Amplifier C (Cathode Base) | 15000 V | — | 850 | — | 9750 mA |
Application Notes
Intended for use as HF amplifier, oscillator, and modulator up to 70 MHz.
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