Tube-number record
GM-1A
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ClassModulator Triode
Construction
Primary TypeTriode
Envelopeglass-to-metal
Sections1
Filament / Heater
Materialthoriated tungsten
Absolute Maximum Ratings
Plate Voltage6000 V
Plate Dissipation30000 W
Audio Performance
Key Features
- Directly heated carbonized thoriated tungsten cathode
- Glass-to-metal envelope
- Forced cooling (water for anode, air for leads)
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Operation Point 1 | 3000 V | 27000 | — | 4.2 | 6000 mA |
| Standard Operation Point 2 | 4000 V | — | — | — | 26000 mA |
| Cut-off characteristic | 6000 V | — | — | — |
Application Notes
Designed for use in low-frequency amplifier circuits with no current in control grid circuit, in RF equipment.
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