Sinclair ZX81 Composite Mod : Part 1

Released in early 1981 (so now 39 years ago, as of 2020), the ZX81 is known for having quite a weak RF signal output. I have been very kindly sent a new miniaturised version of a Composite mod, to install and test on behalf of Ricky ElQasem Please join me, as I attempt to fit this mod to my "Zeddy" and test it out!

As mentioned in the video, Ricky has turned his attentions to fabricating PPE for the NHS in the UK. To date (2/5/2020) he has made between 700-800 face shields made, 400 aprons, about 600 surgical masks and 200 gloves! Amazing work Ricky!
Rickys Retro Gadget website : https://www.youmakerobots.com/

JoulesperCoulomb in-depth analysis of the problem and his proposed solution to it : https://youtu.be/1irH3KuGyl0
A document containing the circuit diagrams and strip-board layout can be downloaded at : http://zx.zigg.net

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Видео Sinclair ZX81 Composite Mod : Part 1 канала Chris's Retro Corner