Antique radios, Old Time Radios
M474
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Country:
Netherlands
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| Identical to |
M474
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| Base |
Europe 6-Pin B6 (Hx B) 1933
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| Filament |
Vf 4 Volts |
| Description |
A tetrode with a penthode charscteristics, designed by J.H. Owen Harries.
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| Information source |
Radio-Expres, Netherlands 10-01-1936
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M474: orig. doc.
Wolfgang Holtmann
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Just Qvigstad
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Collection of
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