Eltz, George Jacob, b. 1893 · New York, N.Y. : Radio Directory and Pub. Co. · leaf 39
hi^h resistance to all frequencies above. In calculating a filter of this character two facts must be given. 1. The resistance (or impedence) of the circuit the filter worksinto. 2. The cut-off frequency. Fortunately the value of the first factor need not be exact avariation of 25% is permissible… … fwrnm
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