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I agree with your point about waveforms but my main aim is to get them to be able to communicate all basic device modules. I do cover waveforms in my lectures but few do their assigned homework on the blocks before my main lecture.

Yes they do fault finding on my simple psu which is spread out and mounted on clear perspex and has loads of test points to do on load and off load voltage measurements and volt drop to understand bad joints etc. I even split it up so they can see what happens when you add the smoothing cap to the rectifier.

My point about carbs is that you mentioned do you teach old x-ray HT generation technology - my point was - stick to the latest HT generation techniques then when they want to understand deeper electrical theory, you can also teach them the old tricks - but this is really for dedicated x-ray engineers