Impressions from analog electronics:
My favorite picture showing the pass-bank (8 tubes 8032)
of a KEPCO BOP1000 power-supply.The power dissipated within
the tubes amounts to 150W. Look at the wonderful blue light
at the top of the tubes which is due to electron bombardment
of the glass:
Not only chemistry can be loud and odorous - this discharge (A Leydener bottle, 80KV, 10cm length of discharge) is not really silent...