Show 01 colu MF P evictor diagram showing how to construct simple crystal set that give results result the receiver about to bo be described can be constructed with veri very little expense tile tho panel to Is a piece of 0 halt half inch wood hard rubber or bakelite tho the oil Is made of wood the panel can bo be any size we suggest seven inches by little inches ns na a convenient one the Is attached to the panel by means of no 0 wood screws one inch long the coll coil la Is wound on a cardboard tube four inches in diameter and four inches long get one quarter pound at 22 d c c magnet wire the winding start the winding and wind on one turn make a loop in tile the wire a loop about one inch long then wind on another turn and make another loop the same length continue winding on oil single turns and taking out loops until ten turns have been wound after tills wind on ten turns make a loop wind on ten en turns more make another loop looi and repeat tho the process aa continue until a total of 00 60 turps turns have been wound on the tho tube solder leads to tile the switch points long enough to reach from faoro the lie le lefthand left ft hand switch to the units taps also solder lends beadil to switch points of tile right hand switch to reach the tens tells taps in rotation solder these leads to tile the ends of p tho the loops after scraping the insulation front from the end of the loop ready to tune in connect the aerial to the post on the left and tile the ground to the post on tile the right at the top of tile the panel set tile ho line fine wire of tile detector on the crystal and turn the tens switch until a station Is heard to tune in better after tile ho station Is hoard heard turn tile the units switch tills this switch gives the alio necessary fine tuning the most operation in using tills het Is to find a sensitive point on tile lie crystal after tills this point Is found it Is necessary to vary tho the two switches to tune time in different stations cleveland news |