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8. All being well, connect another jumper wire from the +60V rail to the PCB point marked C on Diagram 2. Check the
waveform from the output of the IGBT. To do this, monitor the middle pin of the IGBT marked F on Diagram 2. You should
have a waveform similar to that shown below.
9. Move the oscilloscope's Gnd reference to the normal ground point of the amplifier; i.e., the four black wires (shown blue in
Diagram 1). When you turn on the DC power supply, the current should have risen to about 150 mA. You should see square-
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