one of my ancient desktop PC’s has a SVHS output (which will also send composite via the SCART at the same time at the expense of some chroma (colour intensity) loss)

I just happened to have this modulator hanging around 😉

if I had a long enough bit of cable it would probably reach the nearest street box; though the baldy men won’t be happy (especially if cable have reallocated the old s-channels for broadband)

https://www.youtube.com/watch?v=f8bKRQ_BY4o

BTW anyone know of some good freeware visualisation apps which will work on a old XP machine like this (especially in auto mode in time to music?)