GR 15
0 Tubes in archive
ClassCold Cathode Relay Tube
BaseNoval
Construction
Primary TypeCold Cathode Triode
EnvelopeGlass
Sections1
Filament / Heater
Absolute Maximum Ratings
Plate Voltage270 V
Grid 2 Voltage140 V
Cathode Current40 mA
Audio Performance
Key Features
- Cold molybdenum cathode
- Tritium preionization
- Positive starter breakdown
- DC Anode voltage supply
- Noval Base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| DC operation | 220V | - | 8000 | - | 15mA |
Application Notes
Control by photoelectric cells and resistors, ionization chambers, sensitive or high impedance contacts, induced voltages. Electronic timers, counting circuits, automatic switching.
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