Sinclair ZX80 / ZX81 / Z88 Forums

Have you replaced the keyboard with a new one? You can get them on Sell My Retro for around a tenner.

JonnyGee wrote: ↑Sun Nov 29, 2020 6:08 pm Thanks Moggy

As nobody else seems to be doing it, I'm considering supplying sets of the decals via sellmyretro in case other people want to finish off their ZX80 in the same way.

decal-set.jpg

A rather good idea. My ‘80 is in lovely condition but I would buy a set as spares.

All the modern ones do that in my experience (and I’ve fitted quite a few, from various suppliers).

One I’m currently selling:

Good luck with the resonators. When I rebuilt a zeddy from scratch (viewtopic.php?p=27533#p27533) I had endless fun with them.

From the top from a photo I took of a zeddy I desoldered and rebuilt:


Hopefully I counted the ULA pins numbers correctly.

Pretty sure looking at it the top pin is not connected. It looks like it in the photo but I think that is just a scratch.

Thanks to (a lot of) assistance from Paul Farrow one cable delicately bodged modified and I have a great picture and full sound!


Wish I had found a longer cable for the MIC socket. Ah well, cable take 2 I guess.

The middle pins goes to ground by the looks of it:

In the short term it turns out I can use my SpectraSCART with the toastrack and it produces a perfect picture.
It only produces beeper noises directly though so it looks like I need to enter the world of butchering modifying cables.

Always interesting to see another comp mod board. It also always makes me wonder how Pokemon can do such a good board for so little!

Good luck with the builds! :D If you need any Sinclair heatsinks I have quite a few! Mostly because I replace the regulators with these murata ones: https://retroleum.co.uk/spectrum-repairs-mods I’ve bought a few PSUs from here: https://www.oldskoolconsoles.com/product-page/power-supply Ask for the ...