Antique radios, Old Time Radios
2G412
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Country:
France
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| Identical to |
2G412
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| Similar
Tubes |
Normally replaceable-slightly different:
A441N
|
| First year |
1928
??
Saga of the Vacuum Tube, Tyne page 413
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| First Source
(s) |
Aug.1930 : Philips Bulletin R1164, p. 28
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