Simple processing method of wireless microphone frequency off-frequency in professional stage audio

　　1. Connect the negative end of the 9V battery holder of the wireless microphone to a dense spiral with enameled wire, and fix it on the back of the tongue plate at the tail of the wireless microphone. The V segment is longer (winding to the end at a diameter of 2.5MM and then back to the starting point), and the U segment is shorter. (In the diameter of 4MM around to the head squashed).

　　2. Just connect the negative pole of the 9V battery to the battery shell, so that the transmitting antenna of the wireless microphone can be extended through the battery shell, which can increase the transmission distance and prevent the frequency band and frequency running.

　　3. Those who have the ability to disassemble the wireless microphone. . Pull out the tail more than two inches, revealing more than half an inch of circuit boards, find the position of the launch tube, solder it at the 1P capacitor (or a few P capacitors and the smallest capacitor), and wind it into a dense spiral with enameled wire, and fix it in the groove of the wireless microphone tail. , the outer diameter of the spiral is about less than the width of the slot, and it is flattened and fixed in the slot. Note: The wireless microphone with the 5th battery is not suitable for this side, because the wireless microphone with the 5th battery has used the battery shell.

　　4. If the frequency band is staggered. Please open the cover of the serial frequency receiver, keep the antenna lead-in away from the inductor and the mid-cycle, etc., and walk on the top or side to prevent the antenna signal from being directly serialized into the inductor and the mid-cycle (resulting in secondary tuning). There may be some effects, you can try it.

　　5. Sometimes it is useless to stagger the frequency points. Use multiple wireless frequency points in the same place. Two of the frequency points will produce the third frequency point, just like throwing two stones in the river, the third wave will be generated after the two waves interfere. Since the 2 waves are similar in frequency, the 3rd wave is also similar to him, and the 3rd wave will interfere with their "aunts and uncles". In general, the manufacturer will avoid this situation in advance, but there are also unavoidable ones. Therefore, through practice, we must understand which frequency points are the frequency points that can live in harmony.

　　6. When purchasing a VHF or UHF microphone, generally stagger the frequency by at least 25KHz.

　　7. The length of the antenna is inversely proportional to the frequency. The higher the frequency, the shorter the wavelength and the shorter the antenna.

　　8. The antenna lead point can be selected: 1. The negative terminal of the battery clip, 2. Or the emitter of the transmitting tube. The emitters of all transmitting circuits are connected with a minimum capacitance (1P or several P), which can be used to find the capacitance at the same time. To determine the lead point and the emitter of the wireless microphone with two No. 5 batteries, it is invalid to use this method, because it has used the battery shell to transmit the signal, so its effective distance can reach 150 meters.

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