Over time, the cork in the thermos like shrinks, it decreases in diameter and tightly stops clogging his throat. To restore the dimensions of the tube is possible by drilling it from the top blind hole and entering the back benches of thorn — wood truncated cone.
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QUARTZ CALIBRATOR
To calibrate, to establish or verify the performance of the radio equipment in the frequency range of 1-75 MHz allows this device. His scheme (Fig. 1) comprises a generator-the"type"...
NOT TO DIG, DRILL…
Many people, especially those who live in rural areas, had to build, and those who had, perhaps still have, because man by nature loves to build is not only a necessity but a pleasure...
