High-frequency self-excited high-frequency oscillator for blister equipment

The above two types of high-frequency machines belong to self-excited high-frequency oscillators, which are characterized by the fact that the power output tube itself is an oscillating tube, so the output frequency is not a single, but a frequency band, and the oscillating output of one frequency is the most The stronger one is called the fundamental wave, and the rest are called harmonics. The author has measured the fundamental frequency of 3 ordinary machines as 32.50MHz, 32.80MHz and 33.65MHz respectively. The harmonics are distributed on both sides of the fundamental wave, and the total frequency band of ordinary machines is about 20~38MHz.