Radio Antica e Radio d'epoca
DFA7
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Stato:
Gran Bretagna (Regno Unito)
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| Identico a |
DFA7
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| Zoccolo |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Vf 5 Volt / If 0.85 Ampere / Direct / Specified voltage AC/DC |
| Descrizione |
"Similar to the DFA6 but with a larger AC output. It may also be used as a transmitter or modulator in telephony transmitters, with voltages up to 400 on the anode dissipating not more than 10 watts." Mullard.
Va < 400; Ra 2850 ohms, 0.85mA/V at Va=100 and Vg=0
Filament current of 0.85 is a maximum figure. DFA series = Dull Filament Amplifying
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| Bibliografia |
- - Manufacturers Literature Advertisement May 1930
History of the British Radio Valve to 1940 Page 165
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DFA7: Fin Stewart
Fin Stewart
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Just Qvigstad
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Numero
totale di modelli di Radiomuseum.org che
utilizzano questa valvola:1
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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