Tube-number record
1B29
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BrandWestern Electric
ClassSpark Gap Modulator Tube
BaseSpecial / none
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1500 V
Cathode Current60 mA
Audio Performance
Key Features
- Hydrogen argon filled
- Triggered gap modulator
- Any mounting position
- Series operation for higher voltages
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triggered Gap | 1400 V | — | — | — | 30000 mA |
Application Notes
Best suited for triggered gap circuits. Two 1B29 tubes constitute the minimum number for a triggered gap. Overload relay in the d-c supply should be set to trip at 60 mA. Trigger voltage should be applied before d-c power supply voltage.
Datasheets
Datasheet: 1B29.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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