Singapore

●The latest version of TDA7297 pure power amplifier board spare parts and kits, plus anti-reverse circuit, effectively prevent chip burnout caused by reverse power connection, and re-layout of components. The lead hole spacing is standard 3.96mm, which is convenient for direct lead welding Or add standard terminals on the board. The included components, such as the finished drawing, need to be soldered by yourself.

DIY must-see: Recently, very few customers say that the board is noisy. We have analyzed the following reasons: 1. It is powered by a commercial rectifier power supply; 2. No potentiometer is added. Solution: 1. A potentiometer must be added. If the potentiometer is not added, two 47K resistors must be connected in parallel to the left and right channel audio input terminals. 2. If the mains voltage step-down rectifier is used for power supply, the filter capacitor of 100uf must be replaced with more than 1000uf (the battery power supply does not need to be changed). Some customers also say that the heat is large. Most of the reason is that the radiator is not added or the radiator used is too small. A radiator must be added. The recommended radiator size is 100x30x45mm (length x width x height). This part does not include a radiator. .

◆Advantages of this board: no current impact sound when starting up, high signal-to-noise ratio, almost no noise can be heard when the ear is close to the speaker when there is no input; the sound quality is superb-the treble is delicate, soft, transparent, without obvious harshness, and the bass is strong and full , Powerful, and freely retractable. Recently I have seen a small number of customers say that the heat generation is large, which may be the reason why the radiator is not added or the radiator is small. I would like to advise customers: This board needs to be equipped with a radiator of appropriate size (larger than small)



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