File:EB1911 Telegraph - Duplex Working - differential method.jpg
EB1911_Telegraph_-_Duplex_Working_-_differential_method.jpg (557 × 468 pixels, file size: 50 KB, MIME type: image/jpeg)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:55, 22 February 2016 | 557 × 468 (50 KB) | Library Guy | {{Information |Description ={{en|1=The “differential” method for duplex working of a telegraph line: B is the sending battery, B<sub>1</sub> a resistance equal to that of the battery, R a rheostat and C an adjustable condenser. Suppose the key t... |
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