Antique radios, Old Time Radios
228R
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Country:
United States of America (USA)
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| Identical to |
228R
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| Predecessor Tubes |
228A_WE
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| Filament |
Vf 21.5 Volts / If 41 Ampere / Direct |
| Description |
Pure tungsten filament transmitting triode; mu 16, 5KW plate dissipation, 3MHz. Similar to 228A with factory-installed forced air cooling radiator. Offered by Amperex in 1938.
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| Information source |
Tube Lore (I)
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