Tube-number record
GR 15
0 archive entries
GR 15 is a tube type in the TubeDatabase archive (class: Cold Cathode Relay Tube). Recorded specifications: construction Triode, socket Noval (B9A), and maximum plate voltage 270 V. The archive does not yet hold a photographed example of this type.
ClassCold Cathode Relay Tube
BaseNoval (B9A)
Construction
Primary TypeTriode
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 | 220 V | — | 8000 | — | 15 mA |
Application Notes
Control by photoelectric cells and resistors, ionization chambers, sensitive or high impedance contacts, induced voltages. Electronic timers, counting circuits, automatic switching.
Datasheets
Datasheet: GR15.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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