Sinclair ZX Spectrum

Configuration

• Built: End of 1983
• Mainboard: Issue Three
• CPU: Z80A
• ULA: 6C001E-6 (date code 8341, probably made in Phillipines)
• RAM: 48KB
• Came with an original box, cables and manuals.
• Came with an original PSU with UK plug that was later changed to an EU plug (cleaned, untested, unrefurbished).

Trivia

• I bought it in a bundle with a second ZX Spectrum, two Interface1, and a RAMTurbo joystick extension.
• It came with the original box, PSU and cables. According to the price tag on the box, the system was originally bought at Harrods for £129.95.
• The PSU is an UK model that was later modified to get an Euro power plug. There is a label on it that says that the unit has been “re-checked after the recall of 26/2/83”. Actually there has been a major recall of Sinclair PSUs after some faulty units with a poor galvanic isolation were found that were potentially hazardous.
• It had a security sticker.
• My first ZX Spectrum that does not have an Issue Two board.

Restauration Works

• Restauration was carried out between February and March 2022.
• Thorough cleaning of the case. I also removed a security sticker that had been attached by the previous owner.
• The keyboard membrane was intact, but one connector heavily bent, so I replaced it with a new membrane.
• Faceplate replaced with a metallic blue one.
• Replaced 7805 with Traco Power TSR-1 DC/DC converter, removed heatsink
• Recapping, Composite Mod
• Video calibration is not required on Issue Three boards

History

• 2022-04-02
  • Replaced rubber feet (some were missing)
• 2022-03-05
  • Replaced 7805 with Traco Power, removed heatsink
  • Recapping, composite mod
• 2022-02-21: Date of purchase