Show crystal bet detector e c a T that re quires no adjustment i A depend dependable ide crystal detector rei requiring ring no Ita adjustment tan be assembled from the following materials mate two upholstery or thumb tacks tw two 0 binding posts two piece of akellie akell te or other kotlier good insulating materiality materi mitter lal alit it bength anth 0 oll hard bard drawn i loop copper p er nore nil for clips and it a dimill MI ill piece of cr crystal stal any good ery crystal stal will do but perhaps best results v will bo be obtained J the costal Is 19 of the synthetic all nr lety opp one ploce piece of bakelite should be nt at least list idt 1 inches lank and about W of nn 0 n inch square this hits piece Is drilled lengthwise t lirou sli ii tile chef center with ai a small drill of n size to snugly I 1 e tild tho t tw thumb jacks ope one tack Is I 1 s inserted I 1 I 1 in this hole cartal ge pa aj W J baselj i 1 I bif CID Q i L 1 1 form of F fixed crystal pe detector adapt j 1 I 1 ablerto abl to receivers Rec I 1 i f i about S q 10 of nn inchol inch of tile the center centera J tile crystal should now bo be p pounded bounded ol 01 fine grains and of nn an inch of f them the I 1 into tile the hole from the ost end nd the te second botond til anck 1 ek should hould now ow be a inserted ins in this roil sa 0 that the cry fill nl grains make contact between the points of both bachs A mounting far grystar detector moy mity easily be anade from froin tile the coppen and may antee tal e hie fhe forni form choin in the lie t diagram ding i al this type tipe of detector will all prove both sensitive nad and stable find and may he 1 e used fully ina tir lr cult news |