Re: On a mission! Screened mains?
I recall how older (valved) Sansui hi-fi kit often screened runs of internal mains wiring going to and from front-panel switch etc. by running it inside lengths of close-coil steel spring (like a bigger version of curtain wire spring) whose ends and mid-points were secured to chassis with solder blobs.No doubt other manufacturers have done this sort of thing, too.
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