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Retro Computer (6)

Gordon Pimblott

ZX Spectrum+

After the well known 'rubber keyed' Spectrum came the ZX Spectrum+. I never encountered one during my childhood, probably becuase they came out a little later, but also becuase I was perfectly happy with my 48K. The Spectrum+ is basically a 48K with a 'proper'…

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Gordon Pimblott

My first ZX81 (1981)

I started my computing with a ZX Spectrum 48k. I never really noticed the ZX80/81 and I don't remember any of my friends having one. But they both played a significant part in kick-starting home computing. For this reason they were next on my hit-list…

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Gordon Pimblott

Fixing the Issue 2 Spectrum (part 3)

On first inspection the Issue 2 showed a picture with the typical Spectrum coloured border and some flashing bars in the central paper area. The voltages all looked ok, with the exception of a low -5v line. Plugging in the diagnostics cartridge wasn't much help…

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Gordon Pimblott

Fixing the Issue 4 Spectrum (part 2)

After checking the power rails it was obvious that the 5v regulator wasn't working, so first action was to replace it. With the regulator replaced I hopefully tried the power again. This time all the power rails looked good, but still no picture. After checking…

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Gordon Pimblott

A Tale of Two Spectrums (part 1)

A Tale of Two Spectrum's

Over the last couple of months I have been watching YouTube channels of people fixing various retro computers, mainly Commodore 64's, BBC B's and ZX Spectrum's.   Like many others, my computing career started with the Spectrum, so armed with nostalgia,  some self taught electronics knowledge and a soldering iron I decided to take up the challenge and bring a non-working Spectrum back to its full gaming prowess.

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