High Frequency Apparatus Page 190

190 ΑΓ 3"" HIGH FREQUENCY APPARATUS C 3 9™ B 00 ·D Fig. 5.-Details of the core with dimensions former from the liability of dangerous shock but it will prevent high tension surges of current from striking back through the remainder of the apparatus with disastrous results. The Transformer.-The transformer required for the operation of the coil described may be rated at approximately 4 k.w. It may appear to some engineers that the instrument is somewhat overrated, but in view of the fact that it is in use for periods of less than 20 minutes at a