TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas
TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas
TRAFFIC CONTROL TELEPHONE SYSTEMS Circuit - Sam Hallas
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Where satisfactory operation cannot be obtained through a single Repeating<br />
coil, two or more may be connected in series-aiding as shown in Fig. 3.<br />
Branch <strong>Circuit</strong><br />
Intermediate Telegraph Station<br />
Fig. 5.<br />
When it is required to operate selectors on a branch circuit and part of the main<br />
circuit without metallic connection between the two circuits, a transformer connected<br />
as in Fig. 4 may be used between the main circuit and the branch circuit. The capacitor<br />
C is then 10 μF plus 1 μF for each selector on the branch circuit and branch circuit<br />
selector sets have their tuning capacitors short circuited, sets on the main line remaining<br />
normal. Again, if the branch line is too long for satisfactory working through one<br />
transformer or repeating coil, two or more Repeating coils may be connected in<br />
series-aiding.<br />
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