High Frequency Apparatus Page 82

82 22 HIGH FREQUENCY APPARATUS 1 Condenser 2 Large coil 3 Shunting switch Gull coil 5 Ground terminal 6 Interruptor 7 Main switch 8 Occillatior transformer 9 Variable oc nection to primry Fig. 8. Suggestion for assembly of apparatus upon a common base board permitted to contract within the coil. While the winding is being treated, the worker may build the box that is to contain the oscillation transformer. The case may be square and deep enough to permit of an inch of wax above and below the coil. It is obvious that the box must be wax-tight for the molten compound is to be poured into this container. Assembly. For experimental purposes, the component parts of the apparatus may well be mounted upon a common base board. For portable purposes such as upon the lecture platform or with the physician, a cabinet totally enclosing the outfit will be found more satisfactory. The method of mounting is optional with the individual and, for the sake of simplicity, the apparatus is shown ready for use on a base board in the appended drawing. The connections will be clearly understood on refer