Thread: Zx81
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Old 9th Mar 2020, 9:54 pm   #4
Paul Stenning
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Default Re: Zx81

Fortunately the PSUs come apart easily, four screws under the self adhesive feet. Unregulated linear supply with, from memory, a 2200uF and a 1000uF capacitor in parallel. Regulation is by the 5V linear regulator inside the ZX81. You could perhaps try a different PSU as long as it's around the same voltage and high enough current.
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