Antique radios, Old Time Radios
4B4_4pin
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Country:
Belgium
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Brand:
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Ultron (tubes) |
| Tube type: |
Vacuum Pentode Power/Output |
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Ca. 1925 up to 1945 rare. |
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| Identical to |
4B4_4pin
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| Similar
Tubes |
Heater different:
C443_4pin
Other base:
4B4_Ultron
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| Base |
Sidecontact.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC |
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4B4_4pin
Peter den Boer † 2025
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