Radio Antica e Radio d'epoca
D-87722
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Stato:
USA (Stati Uniti d'America)
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| Identico a |
D-87722
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| Valvole
simili |
Altra base:
231D
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| Zoccolo |
Wires only.
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| Filamento |
Vf 3.1 Volt / If 0.06 Ampere / Direct / Battery = |
| Descrizione |
Receiving triode, 231D bulb unbased, with flying leads. Mu = 8.5, Gm 0.38 to 0.56mS. 4000 hours life expectancy; controlled microphonics. Grid and filament spring supported by glass bead from top of plate. Used in 1A Pilot Channel (telephone level regulator of the twenties).
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| Bibliografia |
Tube Lore (I)
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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