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Practical Wireless Telegraphy; A Complete Text Book for Students of Radio Communication

Practical Wireless Telegraphy; A Complete Text Book for Students of Radio Communication


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...in Fig. 174, and a fundamental diagram in Fig. 175. The aerial is connected to the binding post "antenna" and the earth connection is made to the binding post marked "ground." The circuit between these two points is adjusted to resonance with the incoming signal by variation of the two transformer primary switches, the primary loading coil switch, the primary condenser, and the primary condenser switch which is marked "out" "series" and "shunt." The purpose of this switch is to connect the primary condenser in series or in parallel to the aerial or to disconnect the condenser entirely. Thus for long wave lengths the condenser is placed in shunt to the primary winding and for waves below the fundamental period of the aerial the condenser is thrown in series with the primary winding. The function of the three other primary switches is to vary the number of turns of inductance in the aerial circuit. The secondary circuit contains the transformer secondary coil, the inductance of which is varied by the transformer secondary switch, the secondary condenser, th cerusite and the carborundum detectors, the switch for connecting either of these two in the circuit, the potentiometer, and the switch marked "sent," "receive." The transformer secondary is moved in or out of the transformer primary coil by means of the handle marked "coupling." The capacity of the secondary condenser is varied by rotation of its handle, and the potential across the carborundum detector is varied by the rotation of the potentiometer handle. Supplied with this set is a mahogany box containing four dry cells having three binding posts, marked 1, 2, and 3. Nos. 1 and 2 connect to the two binding posts on the rece...


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Product Details
  • ISBN-13: 9781231064085
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 150
  • Spine Width: 8 mm
  • Width: 189 mm
  • ISBN-10: 1231064080
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 281 gr

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