ZX81TS100 From Old to New: Part 1 Intro regulator replacement

I know Ive done a few videos on these before but I thought it might be interesting to do one from start to finish. So heres a Timex Sinclair 1000 the US version of the Sinclair ZX81 going from unknown state built in 1982 to modern 2022 state. This first part is a quick comparison and then replacing the 7805 regulator with a modern one. I already have a video about converting to composite video output but Ill do another ... better ?? ... one for this particular machine: Other parts to come: replacing the RAM replacing the keyboard replacing capacitors maybe replacing the ULA. Inventory of this machine: 1 Board version is Issue 3 2 ULA is 2C210E datecode 8241 socketed 3 Z80 is a genuine Zilog Z8400A datecode 8233 socketed 4 ROM is a D2364C 8KB datecode 8242 socketed 5 RAM is an NEC D4016D 2KB Static RAM soldered Modern voltage regulators - highly recommended - ask Daniel to leave the header pins off so you can mount it anyway you need: ZX81 ROMs: ZX81 ULA versions: ,

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