Tube-number record
6221
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BrandSonotone Corporation
ClassTriode
BaseSubminiature
Filament6.3 V @ 175 mA
Construction
Primary TypeTriode
EnvelopeT-3
SectionsSingle
Filament / Heater
Warm-up Time20s
Heater NotesAC or DC
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation3.3 W
Grid 1 Voltage-55 V
Cathode Current22 mA
H-C Voltage200 V
Audio Performance
Key Features
- Reliable performance under extreme vibration and shock
- Close tolerance on filament current
- Resistance to vibration frequencies up to 2000 cycles
- Flexible Leads
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 100 V | 5800 | 4655 | 27 | 8.5 mA |
Application Notes
The Type 6221 is a medium-mu triode designed for applications where reliable performance under conditions of extreme vibration and shock is essential.
Datasheets
Datasheet: 6221.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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