Not a Radio but I re-wired a house that my brother had bought. It was a bit grotty but empty, relatively clean and accessible. The bathroom looked the best with a modern electric shower [not so common at the time]. In the roof space I found that the regulation [then] 30 amp feed must have run out. It was twisted on to some 2.5 ring cable going to the box and insulated with plasters. The earth hadn't been connected either
. I couldn't believe it! The IR of the elastoplast would have been zero with the shower drawing quite a few kilowatts on load. There were also some of the old style "tobacco tin" junction boxes up there as well [with very sharp edges and porcelain covers with aged twisted wires inserted-still in use!] It was a great pleasure to strip out and replace that lot. There was a choice of death by fire or electrocution
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Dave W