Increasing the frequency of quartz. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Nodes of amateur radio equipment
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The frequency of quartz can be increased by 15-20 kHz in a few minutes. This requires a constant voltage source of 1.5-2.5 V, an alligator clip, 150-180 mm of silver-plated wire with a diameter of 0,8-1,5 mm and a glass of water. The wire is bent in half and connected to it minus the voltage source. The quartz plate is placed in the crocodile clip and connected to it plus a voltage source. Both electrodes are immersed in a glass of water. With this inclusion, the silver coating of the plate is partially etched off.
The quartz frequency should be controlled as often as possible, since the entire quartz coating with a frequency of about 12 MHz is etched in 15-7 minutes. At 3-5 kHz, the frequency rises in a few seconds. A rectifier, a galvanic cell, a battery bank can serve as a source of constant voltage.
Author: V. Shuklin, Kursk; Publication: N. Bolshakov, rf.atnn.ru
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