Antique radios, Old Time Radios
B507
Country:
France
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Identical to |
B507
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Similar
Tubes |
Normally replaceable-slightly different:
1560
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First year |
1928
Saga of the Vacuum Tube, Tyne page 413
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First Source
(s) |
Aug.1930 : Philips Bulletin R1164, p. 29
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