Surgery was a success! The ZX81 now has composite video! Shame most of the keys don’t work (probably the shitty ends on the connectors to be fair) but in all honesty I was planning on replacing it outright with a complete front patio remodelling if you know what I mean.
That and the 32K internal ram mod and first round of renovations is done!
@wolf480pl yes and yes :)
It was crazy simple, I just snipped the video and 5V in just inside the case for the modulator (okay, ended up doing video in just *outside* because the wire was jammed in between a resistor and a capacitor) and the video out from the output jack and wired all three into a TheFutureWas8Bit Atari 2600 composite mod, along with ground to the modulator casing.
Basically just followed this http://blog.tynemouthsoftware.co.uk/2016/11/zx81-composite-video-modification.html
grimmwa.re
Wolf480pl