Antique radios, Old Time Radios
2A7S
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Country:
United States of America (USA)
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Brand:
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| Tube type: |
Pentagrid-Converter (Heptode) Frequency converter Controlling (mu) |
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| Identical to |
2A7S
= CV787
= Ut-2A7
= PH2A7
= PH2A7
= Ut2A7
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| Similar
Tubes |
Other shape (e.g. bulb type):
2A7
; G-2A7-S
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| Base |
7-Pin-Base U7A = small, old, USA (Codex=Mh)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.5 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Which differences of characteristics between 2A7S and 2A7 ?
Babani's International Radio Tube Encylopedia gives a different Ig2 current as a 2A7, but Brans Vademecum 1945 and 1961 gives as electrical equivalent.
The shield on this tube is metallised paint. Replacement tubes made by National Union, Raytheon and Sylvania utilised a sheet metal shield.
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
x 116 x 38 mm / x 4.57 x 1.50 inch |
| Weight |
39 g / 1.38 oz |
| Tube prices |
1 Tube prices (visible for members
only)
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| Information source |
Taschenbuch zum Röhren-Codex 1948/49
Babani, International Radio Tube Encyclopaedia
-- Collector info (Sammler)
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2A7S
Emilio Ciardiello
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Just Qvigstad
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2A7S: Babani 1949-1951
Patrice Zeissloff
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2
Collection of
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