. Elementary and dental radiography / by Howard Riley Raper . Fig. 32. A, iron core. B, iron core with primary winding. C, iron core, primary winding and , iron core, primary winding, insulation and secondary winding. Now let us consider the high-frequency )iflb-Trequency (Figs. 14 and 35.) In mechanical construction theColl. high-frequency coil may be considered a kind of double coil with the secondary of the first coil act-ing as the primary of the second coil. The primary current of the firstcoil should be 34 ELEMEXTARY RADIOGRAPHY From the supply wire the current pas
. Elementary and dental radiography / by Howard Riley Raper . Fig. 32. A, iron core. B, iron core with primary winding. C, iron core, primary winding and , iron core, primary winding, insulation and secondary winding. Now let us consider the high-frequency )iflb-Trequency (Figs. 14 and 35.) In mechanical construction theColl. high-frequency coil may be considered a kind of double coil with the secondary of the first coil act-ing as the primary of the second coil. The primary current of the firstcoil should be 34 ELEMEXTARY RADIOGRAPHY From the supply wire the current passes through the primary wind-ing of a step-up transformer (first coil) at the usual commercial ioo to125 volts. 60-cycle. (Fig. 35.) An alternating current of the samefrequency as the primary, but higher in voltage and lower in amperageis generated in the secondary of the transformer, and passes into thecondenser, which acts as a reservoir. As the current leaves the condenserand jumps the regulating spark gap. it is oscillating at a frequency of
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