I did everything according to your instructions. Jumpers J3, J4, J8 installed (240 volts). The rest of the jumpers have been removed. After setting the jumpers to 240 volts, the resistance between the contacts C2 increased from 0.5 to 2.1 Ohms. Connected power through a 100 watt light bulb. At first, the light bulb burns brightly, then gradually the glow decreases. At the same time, the VU meters light up. Didn’t notice a burning smell. I recorded a video, please watch. Is this a normal reaction? Is it possible to turn on the amplifier directly without a light bulb?