Sinclair ZX Spectrum +3 to Hitachi Monitor lead / Cable, 8-pin to 7-pin DIN male | eBay
ZX Spectrum 48k Easy Composite Mod - YouTube
Supratim Sanyal's Computing Blog | Wandering Digital Wastelands as a Geek: Powering up a British ZX Spectrum after 30 years in America - The PAL UHF Analog TV and 220V AC Challenge