Antique radios, Old Time Radios
7A4
Country:
United States of America (USA)
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Brand:
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Tube type: |
Triode, vacuum Universal |
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Identical to |
7A4
= VT-192
= CV1770
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Similar
Tubes |
Other class quality (otherwise equal):
XXL
Heater different:
14A4
Other base:
6J5GT
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First Source
(s) |
08.Mar.1939 : Electron Tube Registration List
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Predecessor Tubes |
6J5G
6J5
6P5G
6P5GT
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Base |
Loctal-8, B8G (Sylvania, 1938) (Codex=W)
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Filament |
Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC |
Description |
= 1 unit of 7N7
Text in other
languages (may
differ)
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Tube prices |
3 Tube prices (visible for members
only)
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Information source |
Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49
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7A4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
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7A4: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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7A4: Sylvania Technical Manual
Peter Hoddow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):131
Collection of
Collection of a member from FIN Collection of a member from D
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