STK4044 STK4050 PCB files. lay is the extension with Sprint-Layout you can open programs you are not using 5.0 only trace found in the file and Sprint-Layout-Viewer which is free for Print Program use: STK4044 STK4050 100 watts to... Electronics Projects, STK4044 STK4050 Amplifiers Circuits PCB "audio amplifier circuits, ic amplifier, " Date 2019/08/01