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

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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R20 vacuum tube outline illustration

Tube-number record

R20

0 archive entries

R20 is a tube type in the TubeDatabase archive (class: High voltage, half-wave rectifier). Recorded specifications: brand BRIMAR, construction Rectifier, base B9A, socket Noval (B9A), and maximum plate voltage 22000 V. The archive does not yet hold a photographed example of this type.

BrandBRIMAR
ClassHigh voltage, half-wave rectifier
BaseNoval (B9A)
Filament2 V @ 350 mA

Construction

Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialB9A
SectionsSingle

Filament / Heater

Heater NotesHeater current: 0.35A (350mA)

Application Notes

X-ray shielding is advisable for protection against possible danger of personal injury at PIV in excess of 16 kV. Pins 3 and 7 may be connected to points in the heater circuit only and must not be earthed. No low potential circuits should be connected to any base pins.

Datasheets

Datasheet: R20.pdf

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

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    Absolute Maximum Ratings

    Plate Voltage22000 V
    Cathode Current0.8 mA

    Audio Performance

    Key Features
    • Television line flyback EHT rectifier
    • B9A Base
    • CT1 Cap