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Tube Database (7,341 tube types · 1,270 archive entries)

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1B29 vacuum tube outline illustration

Tube-number record

1B29

0 archive entries

1B29 is a tube type in the TubeDatabase archive (class: Spark Gap Modulator Tube). Recorded specifications: brand Western Electric, construction Other / special, socket Special / none, and maximum plate voltage 1500 V. The archive does not yet hold a photographed example of this type.

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

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Triggered Gap1400 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

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Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.

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    Audio Performance

    Key Features
    • Hydrogen argon filled
    • Triggered gap modulator
    • Any mounting position
    • Series operation for higher voltages