Specification► In this post I make a High pass filter for High frequency driver using 4558D ic. you can also use here TL072, TL082, NE5532 ic. Frequency response 5khz - 20khz. For power supply you can use 12-0-12V 500mA/750mA transformer.
How to make pcb by ironing mathod► For make pcb you need pcb layout. download the pcb layout and print it by laser printer on photo paper. Then cut the pcb layout. Then press the pcb layout by iron on copper clad board. Press the iron 10-15 munites. Then leave the pcb for cool down 10 munites. when the pcb was cool, put the pcb in water and move the pcb layout to copper clad board. Then put the pcb in ferric chloride [FeCl3+H2O] for etching 10-15 munites. when etching was end, clean the pcb by water. Then make hole on pcb. And then press the upper side print of pcb. Now your pcb is ready, mount components by instruction.
How to test this High pass filter► After complete this board don't forget to series light test. After connecting the series light, make sure that the series light does not turn on. If the series light not turn on, then check the voltages. output voltage = 0.0 volt input voltage = 0.0 volt if you get same voltages, then connect this preamp to amplifier.
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Good work
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