Sell 1969 Class A PCB Full Range HIFI Stereo Power 2.0 Channel Amplifier Board Kit best price

Description: Two M3 screw holes are specially designed on the bottom of the heat sink to fix the amplifier in the chassis, which is not only firm but also more conducive to heat dissipation. The motherboard supports TIP41C and TTC5200 output power tubes respectively, and supports both horizontal and vertical installation methods. All famous brand capacitor and transistor, FR-4 good PCB, easy to solder and long life,it is still beneficial to sound quality. 1969 is a more powerful power amplifier, very special current negative feedback circuit, unlike common voltage feedback, no high frequency compensation, wide frequency response, and very high stability. Tips: It is diy kit,need assemble to work.Please take full consideration to buy. Specification: Product name: Amplifier board kit Color: Blue+ blue Material: Metal + plastic Size: (About)13.1 x 5.0 x 2.3cm Debugging method: 1. Pre-adjust the on-line resistance of the quiescent current adjustment potentiometer before power-on is about 930 ohms. This is also our recommended working current. The fans can also adjust to their favorite position. The higher the current, the more heat is generated; 2. Then power-on adjustment of the key potentiometer, and test the ground voltage of the two midpoint test voltage points, until half of the power supply voltage, replace the use of different power supplies, it is recommended to readjust the midpoint voltage; 3. Quiescent current regulation can also be carried out by using the circuit in series with the ammeter, which will be more accurate; 4. When power-on debugging, please be careful, do not touch the pen tip of the multimeter, so as not to damage it! Package included:  1PC *Amplifier board kit Note: Transition: 1cm=10mm=0.39inch  1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement. #Amplifier #Board #Kit #High #Fidelity #DIY #2.0 #Channel #PCB #Full #Range #Audio #Heatsinks #Components #Stereo