We can modify your ZX81 to use composite video instead of RF (aerial). Because this modification involves fitting a "ZXVid" there are no external changes
to your ZX81 - you just plug in the supplied phono lead to your ZX81 and your television's "video in" port.
Just send us your ZX81 on its own and you'll have it back in a few days (1st class recorded postage is, of course, included), with a better video display than you've seen before. Not only that but for the first time it will display correctly on an LCD television
We will usually also change the electrolytic capacitors and the power regulator, as these parts have mostly aged and now cause interference.