File:EB1922 Telephone - Telephone repeater circuit.jpg
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EB1922_Telephone_-_Telephone_repeater_circuit.jpg (781 × 466 pixels, file size: 64 KB, MIME type: image/jpeg)
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Summary
| Description |
English: A modern telephone repeater for insertion at an intermediate point in a long telephone line consists essentially of two thermionic tube amplifiers, one for the up and one for the down side of the line circuit, associated with apparatus for balancing the line circuits for duplex working, the telephone circuit being necessarily a duplex circuit. The general arrangement is shown in the figure. |
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| Date | published 1922 | |||
| Source | “Telephone,” Encyclopædia Britannica (12th ed.), v. 32, 1922, p. 709, fig. 6. | |||
| Author | William Noble | |||
| Permission (Reusing this file) |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:22, 13 January 2020 | | 781 × 466 (64 KB) | Bob Burkhardt | {{Information |description ={{en|1=A modern telephone repeater for insertion at an intermediate point in a long telephone line consists essentially of two thermionic tube amplifiers, one for the up and one for the down side of the line circuit, associated with apparatus for balancing the line circuits for duplex working, the telephone circuit being necessarily a duplex circuit. The general arrangement is shown in the figure.}} |date =published 1922 |source =“Telephone,” ''En... |
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