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Each kit contains all the necessary parts, including keyboard, case, printed circuit board, resistors, capacitors, connectors, integrated circuits, power supply, cables etc. When completed the computer can be used on UHF Channel 33 of any Black & White or Color TV. It is possible to use the computer on UK (50 hertz) and US (60 hertz) televisions by setting a 'jumper' on the circuit board.

All parts are high quality and the glass epoxy PC board has a clearly silk screened parts legend.

Each kit contains all the necessary parts, including UK keyboard, case, printed circuit board, resistors, capacitors, connectors, integrated circuits, power supply (110v), cables etc. Assembly instructions are included in with your ZX81 kit , and are also available in the Kits Assembly Instructions section online here as well should you need them.

When completed, the ZX81 computer can hook up to Channel 33 on any black & white or color TV for its video display (UK (PAL) and US (NTSC) Compatible - selectable by jumper when the kit is being assembled). It has a complete (English) BASIC language interpreter in ROM memory, and it can save and load programs on standard cassette tape recorders (these are available from Retro-Trader.com if you need one). The kit's five Integrated Circuits make clear the architecture of a typical computer. Processor (1) , ROM (1), RAM (2) , and Glue Logic (1).

As the kits were originally intended for the South American market, we currently have no UK / European power supplies or manuals available. Generic 9v 0.7A power supplies are available are available cheaply from retailers such as Tandy or Maplin and also from Retro-Trader.Com . Searching the internet often turns up such items at surplus electrical disposal stores. Also checkout out the Retro-Trader web site for spares , software , and more for the ZX81,  plus a raft of other formats !

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