Tube-number record
RS 1021L
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BrandSiemens
ClassTransmitter Power Triode
Construction
Primary TypeTriode
EnvelopeMetal-Glass
Base MaterialMetal
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage5000 V
Plate Dissipation3000 W
Grid 1 Voltage-400 V
Cathode Current2500 mA
Audio Performance
Key Features
- Disc-shaped grid lead-through
- Suitable for TV transmitters up to 220 MHz
- Thoriated tungsten cathode
- Integrated air cooling radiator
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| RF Amplifier B-Operation (Grounded Grid) 30 MHz | 5000 V | 30000 | 1933 | 58 | 1550 mA |
| RF Amplifier B-Operation (Grounded Grid) 220 MHz | 2200 V | 30000 | 1933 | 58 | 1150 mA |
| TV Modulation (Grounded Grid) Peak Synchronous | 2200 V | 30000 | — | 58 |
Application Notes
Vertical mounting position required. Axis vertical, anode up or down. Air flow must be monitored; plate and heater voltage must be interlocked with cooling air supply.
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