Antique radios, Old Time Radios
U30
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Country:
Great Britain (UK)
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| Identical to |
U30
= ZA7237
= CV3752
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| Similar
Tubes |
Normally replaceable-slightly different:
U26_Hivac
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| First year |
1924
Tube leaflet collection E.Erb Analysis by original leaflets
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| First Source
(s) |
22.Nov.1935 : Wireless World (The), London (WW, 79)
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| Base |
British-7-Pin, old (M7A) (Codex=Ni)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 26 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC |
| Description |
Center tapped filament enables parallel feed 13 V / 0.6 A or series supply at 26 V / 0.3 A. Independent systems (separate cathodes). Also for voltage doubler circuit.
Text in other
languages (may
differ)
|
| Information source |
- - Manufacturers Literature Funke W18, Karte 437
Babani, International Radio Tube Encyclopaedia p. 290 & 291
History of the British Radio Valve to 1940
Taschenbuch zum Röhren-Codex 1948/49
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U30: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):37
Collection of
Collection of a member from FIN Collection of a member from D |
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