High-fidelity Tourifile Audio Signal Transmission Circuit ----- Audio Transmitter

Keywords: FM transmit circuit, audio transmission circuit High-fidelity tuning audio signal transmission circuit When watching TV late at night, you usually have to reduce the volume to avoid affecting others, this is likely to hear TV sound. If there is a circuit to transmit the TV audio signal to the surrounding space, then use the FM radio to receive this problem well. This circuit is shown in Figure 1. In the circuit, the VT1 and its peripheral circuit constitute an oscillating circuit, the oscillation frequency is about 98 MHz, R1, and CX is an audio pre-load circuit, which is used to improve the frequency response of the audio signal, and improve the sound quality. The L1, L2 are all removed from the 5 mm skeleton by 1 mm, and the length is pulled around 11 mm, as shown in FIG. If the circuit does not work normally, check whether the metader pin and the contact of the connection are good, especially the pin of the transistor cannot be soldered. The circuit has changed the circuit if the electric motor is changed by the tweezers short circuit L1. If the current does not change, it should be checked that the resonant capacitor C3 is already connected, and its capacitance is adjusted until the circuit is ivit.

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