Signal Service (France) Technical Instructions No. 7 Wireless Trench Set, DC 50 Watts, April 1918

Signal Service (France) Technical Instructions No. 7 Wireless Trench Set, DC 50 Watts was issued by the Signal Service (France) during the First World War.

Contents are

I - Description of Apparatus

II - Stores required

III - Erection of Station

IV - Tuning-up and preparation for work

V - Overheauling and testing a set

VI - Common faults

VII - Transport

VIII - Ranges

IX - General Notes

Pages Gallery

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  Figure 1 - Primary Circuit

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  Figure 2 - Closed Transmitting Circuit

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  Figure 3 - Aerial Circuit

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  Figure 4 - Closed and Detector Circuits for Reception

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  Figure 5 - Transmitting Key - Short-circuiting Contact

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  Figure 6

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  Figure 7 - Transmitting and Receiving Circuits

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  Figure 8 - Arrantement of Instrument

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  Figure 9 - Relative positions of sets of two stations

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  Figure 10 - Arranement of Insulators

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  Figure 11 - Arrangement of "earths" when nets are not available

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  Figure 12 - Battery Connections - Transmitting

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  Figure 13 - Arrangement of Trembler Blade

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  Figure 14 - Ebonite Board

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  Figure 15 - Platinum Contacts

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  Figure 16 - Height of Crystal