Traditional Chinese Indirect Frequency Electrotherapy Apparat (Workshop Practice) — Circuit, Wiring & Debug Guide

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In short: Traditional Chinese Indirect Frequency Electrotherapy Apparat (Workshop Practice) — Circuit, Wiring & Debug Guide. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 2552 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.

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Interfrequency electrotherapy instrumentWhen audio current passes through the human body, it has a regulating effect on the nervous system. Under certain conditions, it can promote blood circulation, expand blood vessels, lower blood pressure, improve metabolic capacity, and improve tissue nutrition. If appropriate drugs are added to the electrodes, they can also reduce inflammation and analgesia. Based on the above principles, an audio electrotherapy instrument was developed.The circuit principle of the audio electrotherapy instrument is shown in Figure 49. It consists of resistor-capacitor oscillator, preamplifier, push-pull power amplifier and output current indicator. It is actually an audio signal generator with a large output power. …

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