Metal detector TX-850 with 30.875Mhz quartz. Output frequency is 19.8Khz not 59khz.
Very short video where testing the operating frequency after the change of the original quartz 10.000kHz with one from 30.875khz on tianxun TX850. The operating frequency does not increase to 59khz as claimed by many, but is around 19.8khz. By measuring the frequency emitted by the oscillator, then you notice that it is not to 30MHz, as you would expect, but it is only 10,3mhz, so very similar to the frequency emitted by the original quartz...
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