Tube-number record
GR 33
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ClassCold Cathode Relay Tube
BaseMiniature 7-pin (B7G)
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage290 V
Grid 1 Voltage137 V
Cathode Current25 mA
Audio Performance
Key Features
- Molybdenum cathode
- High stability starter breakdown voltage
- Independent of illumination
- Direct control and capacitive control
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| DC operation | 220 V | — | — | — | 10 mA |
Application Notes
Electronic timers, automatic switching, voltage monitoring and indication. Requires positive anode and starter for DC operation.
Datasheets
Datasheet: GR33.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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