Antique radios, Old Time Radios
2B21
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| Tube type: |
High-vacuum Rectifier |
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| Identical to |
2B21
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| Similar
Tubes |
Normally replaceable-slightly different:
2X2
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
Top contact with a cap.
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| Filament |
Vf 2.5 Volts / If 1.75 Ampere / Direct |
| Description |
HV rectifier. Improved version of 2X2.
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| Information source |
Tube Lore (I)
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2B21
Emilio Ciardiello
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Just Qvigstad
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