Radio Antica e Radio d'epoca
3D21B
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Stato:
USA (Stati Uniti d'America)
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| Identico a |
3D21B
= CV5355
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| Valvole
simili |
Other shape (e.g. bulb type):
3D21A
Other class quality (otherwise equal):
3D21WB
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| Prime
informazioni |
30.Sep.1957 : Electron Tube Registration List 2017
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| Sostituisce i modelli |
3D21A
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| Zoccolo |
Octal (Int.Octal, IO) K8A, USA 1935
Top contact with a cap.
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| Filamento |
Vf 12.6 Volt / If 0.85 Ampere / Indirect |
| Descrizione |
Beam power tube intended to operate as blocking oscillator for pulse modulators up to 20KW. May also be used as deflection amplifier. Specially designed to utilize high-volume materials and production techniques, typical of receiving tubes.
Centre-tapped heater; may be operated at 6.3V, 1.7A. 15W plate dissipation.
Differs from 3D21A for the tubular T-12 bulb.
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| Peso |
60 g / 2.12 oz |
| Bibliografia |
- - Manufacturers Literature
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3D21B: H.H.
Heinz Höger
Segue ...
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Just Qvigstad
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3D21B: H.H.
Heinz Höger
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Collezione di
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| Conformità dei dati |
Ulteriori informazioni |
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