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

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Tube-number record

4A21

0 archive entries

BrandGeneral Electric Co.
ClassBallast Tube
BaseSpecial / none

Construction

Primary TypeOther / special
EnvelopeGlass
SectionsSingle

Filament / Heater

MaterialIron Wire

Absolute Maximum Ratings

Cathode Current1700 mA

Audio Performance

Key Features
  • Current regulation ±2%
  • Iron wire element
  • Mounting position Any

Datasheets

Datasheet: 4A21.pdf

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

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