Fig 1.—Output filter circuit for magnetic speaker. C1, 4 mfds.; C3 4 mfds.; C2, 01 mfds.; R, 5000-10,000 ohms. Fig. 2.—The elements of the filter circuit mentioned in the article. In this simplified circuit the plate current flows round the speaker windings. Condenser approx. 01 mid. Resistance approx. 5000-10,000 ohms.
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Radio Record, Volume IV, Issue 36, 20 March 1931, Page 18
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50Fig 1.—Output filter circuit for magnetic speaker. C1, 4 mfds.; C3 4 mfds.; C2, 01 mfds.; R, 5000-10,000 ohms. Fig. 2.—The elements of the filter circuit mentioned in the article. In this simplified circuit the plate current flows round the speaker windings. Condenser approx. 01 mid. Resistance approx. 5000-10,000 ohms. Radio Record, Volume IV, Issue 36, 20 March 1931, Page 18
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