A practical Treatise on Wireless Telegraphy and Telephony, giving Complete and Detailed Explanations of the Theory and Practice of Modern Radio Apparatus and its Present Day Applications, together with a chapter on the possibilities of its Future Development
Fig. 62.—Portable pack set. The receiving outfit is contained in the left hand case; also the key and
interrupter. The tubular condenser, spark gap, and induction coil may be seen in the right hand case.
50