I installed the output fets and the when I power up the amp , it draws 20 amps of current . Plus I was rereading this thread, the 640s gate pins had +6 volts not -6 volts . This has to be why the amp goes red line full amps . Bad drivers but they look good ? Oh and Perry like you said about lnductors the power supply transformer was making a high pitch noise but stopped. I tryed powering the amp and twisting on all inductors but no good , fuse would short out still . Power supply fets heat up and only 640s not 9640s .
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Perry found the problem , it was one 9640 output fet that was getting hot check the gate resistor 8,500 ohms lol open. Put in 22 ohm resistor good to go , thanks Perry . Just one thing I get a small high pitch noise from two of the inductors on the output side , is that normal ?
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