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Show What You Should Know About Drilling Panels The simplest things in radio are the ones that are apt to cause the most trouble. Kor instance, drilling the panel. This is an almost insurmountable insurmount-able obstacle to some of the builders who have never constructed a mechanical me-chanical contrivance in their lives and who view the brace and bit as a tool of the master mechanic. Kirst it is necessary to lay out the position and size of (he holes to be drilled. Where an Instrument Is held in place with two or more set screws it is best to make a half-inch hole for the center shaft, if the instrument is then slightly off, It will still turn easily on its bearings without binding. In the cartons containing the Instruments Instru-ments are often inclosed templates showing the spacing of the holes to be drilled. These should be used when drilling the holes. If made of paper they can be paicd directly on the panel and the holes drilled through llieiu. The paicr is then p-moved ith a wet cloth. If it is ncesary to calculate your ; own positions, do so by in. !i;iri:i:; ! d';-;:ilice that one of the h"le is from the shaft end then the d'Matioo beioA it. 1'or install. -e. a rule i In'd again--! th" s-i:aft an 'I i..ii--'i.!is tin- ''i-screw. ''i-screw. Ti;e leading on the rab-r with one-half the lihilnet. r of the shaft, or an eighth of an itch, will be the d's-lanee d's-lanee to one side. Then by doing th's straight up al.d do v. l:. instead of side-II1S. side-II1S. the depth wih be rolllld. Voiv 'from the center iKiV-vnrk. mtiur the prop-r (iistaie c to on,- side and the proper depth from th.-r". Mar'; and I drill. The location of the other bolo I or boles may he .l.-.Ti..in-l by r.-vers- in; the procedure. |