OCR Text |
Show Novel Detector Can Be Built for Small Sum I A new detector stand. The control , is universal and when once adjusted will stand quite a jar. The principal j feature of this detector is the small , J sum for which It can be made. The I pencil, which is of the ever-sharp type, j can be purchased for 10 cents and the , rest of the parts are found in nearly every amateur's junk box. The lead from the pencil is removed and a cat whisker is soldered to the bar that runs through the center. If the type of pencil you purchase has j no bar through the center, but jus-' a 1 clutch, use a' piece of copper wire the j size of the lead that Is used in the , pencil and solder the cat whisker to It. ; Next a one-half-inch ball-bearing Is I soldered about one and three-quarter j Inches from the blunt nd of the pen- , I ell ; this can be done very neatly by heating tbe ball with a gas flame and putting a drop of solder on It. A little 1 flux Is put on the pencil where it is to I unite with tbe ball, and the pencil H applied to the ball while the solder is : still soft. You will then have a good ! j joint. Next make two little angles of : sheet brass, through which drill a hole j three-quarters of an inch and two holes 1 one-eighth of an inch. The former hole ! is to form a socket for the ball, which j sets between these two angles of brass when mounted on the base. i The crystal cup which is soldered or riveted to another brass angle Is then 1 i A Crystal Detector Using an Ever, sharp Pencil for Adjustment. made with two small holes for mounting mount-ing ft to the base. A knob for adir.st- j Ing the pressure is made by using a composition finding post. Solder a' small screw to the end of the pencil - ' an old battery terminal Is verv good for the purin.se. Screw on the 'comp.v ' sitlon tin, ling post and assemble and mount the parts on a base, which can ' be made of bakelite, rubber or a piece ! of hard w ood. j Kirn one wire from lu. ervstal cup to 1'inding post ami one from one ol the sockets to the other binding post ' which can he placed to suit the build--r. and yo then have a detector n,. can be adjusted i even- wav. IMinen slons of ail the parts are not given but are left to the discretion of the builder st'-eet and morning wear. There Is n.i . dissension about this. u ,. ,,,. Hers being agic-d. even 1'nul 1'oltvt 1 whose creations differ so strikingly from all others. The Ugh, Huvnnn 1 brown claims a certain popularity d ay and beige are very good for tbe ' tadleiirs and drenses deseed to bo ! won, the summer. These are the leading colors. l,lu. k having Vl.rt. ,,, place in this class of garment. " p.irk i blue In combination with widely varying vary-ing detail diners according "to th, house which shows 1 1, |