Re: Back in the day
Yes, in my teens (Early 80's) repaired core memories, the only ones that had the equipment to do this in the UK. They used to hum tremendously and blow up because of resonance and blown transistors... I seem to remember. Later in 1984 at Broadcasting House, worked on repairing valve ampliers, where the gain was so high, that the valves were microphonic. Now I feel like an even older fart!
Great article though!
East to see some hackers trying this together with a whole arsenal of other vulnerabilities to supplement their hoard of stolen bitcoins, where the value of data gathered is worth LOAD$AMONEY.....again only oldies would understand Harry what-is-name punchline.