Radio Broadcast (Nov 1923-Apr 1924)

Record Details:

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In the R. B. Lab. same time. Four small blades with fine teeth for metal work, and two larger blades, with coarser teeth, for working hard wood, rubber, and bakelite, are desirable. Any material with which the electrical experimenter has to deal can be cut by the hack-saw. It is particularly convenient in metal work, and it saves much time and labor on pieces too large for filing. It is also handy in cutting panels to size, and, on some woodwork, it makes a much neater job than the ordinary cross-cut saw. In the usual position, with the teeth of the blade facing down, the hacksaw is unable to cut more than 111 ! i AMI s\ X \ \ \ \ \ JAPS. \\\w r\\\\ I I 1 i i ii1 \ \ 1 \ i 'i. } FIG. 9 How the extra coil is mounted on the plate variometer. The use of three taps, one for eliminating the coil altogether, is sometimes desirable, but not necessary four or five inches before the motion is obstructed by the frame of the saw. However, the blade may be turned at right angles to the ordinary position (Fig. io), and a cut of any length may be made with the blade in this position (providing, of course, that you do not saw so far from the edge of the material, that the frame is again in the way) . The vise described last month is just the thing to use when working with the hack-saw. FIG. IO Making a long cut with a hacksaw, the blade turned sideways