Originally Posted by indikator
a newbie question,
why is it danger working with tubes and high voltage?
isn't it disconnected from wall socket when we build it?
It isn't when you are using it.
If you make an error you could have +400V or more on a volume knob, headphone jack or other exposed component.
If it doesn't work, you may need to troubleshoot it with the power on. Also dangerous if you don't know what you are doing or make a mistake.
By dangerous I mean potentially fatal.