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Important Update: Capacitor C4 is marked on the schematic as "NC". After the video I was checking the bags and there was a remaining SM 270pF capacitor remaining. I installed this cap in C4 and that greatly improved the signal. I'll show the new trace in the next video. In this video I complete the amplifier and do a few tests. I'll probably do some more experimentation/tests in a future video. The spreadhseet with the biasing results is here: https://drive.google.com/file/d/1WuPT... 0:00 Alternative biasing for 2SC1971 2:23 FInal stage on the board 2:55 Description of L1 and T3 on the board 3:26 2SC1971 reinstalled and FInal stage SMD components installed 4:37 220 ohm feedback resistors installed 5:32 How to wind T3 7:25 Testing continuity of T3 8:05 T3 and L1 installed 8:36 First test without heatsink 9:40 Trace on the oscilloscope 10:15 Board mounted on the heatsink 10:40 Tested with board on heatsink 11:47 Self Oscillation? with increased (3.75V) gate voltage 12:35 Testing the amp with an AM signal 13:40 Wrap up