In the manufacture of models or devices containing frequently unscrews detail, there is often a need to do the knurling (knurled) outer surfaces of the nuts or screw heads. With this purpose usually use a special device consisting of one or two fine teeth hardened rollers in the mandrel. During rotation of the part fixed in the Chuck of the lathe, the teeth of the rollers are pressed into the surface and form therein a corrugation. With the appropriate equipment the operation is not complicated. However, if you want to make knurled at home?
THE KNURLING MAKES THE FILE…
As a hobbyist designer with years of experience and a former captain of the regional team sports radiointerview (the hunt for “foxes”) offer a development designed to significantly improve the organization and conduct of training, competition, as well as to facilitate to beginners the way to the fascinating world of radio sport. In essence, this is a homemade compact and reliable transmitter “Fox” (PL). However, it is assembled by an improved wiring diagram, with keying in the power circuit of the crystal oscillator (Fig. 1).
