Sinclair ZX81 Kit

The Sinclair ZX81 was the third of Sir Clive Sinclair's commercially available computers. Sir Clive was one of the UK's great innovators, having created (amongst other things) the Sinclair of Cambridge MK14 microcomputer, the success of which lead to Sinclair Research and the ZX80 in 1980, available in kit form by mail order from popular electronics hobbyist magazines.

The success of the ZX80 lead Sinclair to create the ZX81 in 1981 with a larger memory and improved mathematical functions. It was extremely popular due to its low cost and relative power, and hence well supported with software and peripherals by both Sinclair and other companies. The ZX81 was also extensivly used in schools and colleges for educational purposes, many people working in the computer industry today had their first computer experiences with the ZX81.

The ZX81 was available in kit and pre-built forms until the Sinclair ZX Spectrum (with hi-res colour graphics and sound!) outdated it. The ZX81 however was not forgotten and continues to provide its users with simple computing fun 20 years later as a look through our links page, or a quick search on the internet will show.

The kit contained 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. 

Sinclair ZX81 Personal Computer kit(s). Price includes ZX81 BASIC manual, excludes mains adaptor. £49.95
Mains Adaptor(s) (600 mA at 9 V DC nominal unregulated). £8.95
Post and Packing. £2.95

Our kit is pristine in that it is in the original unopened packlaging.

 

Manufacturer: Sinclair
Date: 1981

Other Systems Related To Sinclair ZX81 Kit:

Item Manufacturer Date
Science of Cambridge MK14 + Original Keyboard Sinclair 1977
Science of Cambridge MK14 Sinclair 1977
Science of Cambridge MK14 - Original Kit Sinclair 1977
Science of Cambridge MK14 + Memory Expansion in wooden case Sinclair 1977
Sinclair ZX80 Updated to ZX81 Sinclair 1980
Sinclair ZX80 Sinclair 1st June 1980
Sinclair ZX81 Issue One Sinclair 5th March 1981
Sinclair ZX81 (Signed) Sinclair 5th March 1981
Sinclair ZX81 with Custom Case/Keyboard Sinclair 5th March 1981
Sinclair ZX Spectrum Console Sinclair 1982
Timex Sinclair 1000 Sinclair 1982
Early Sinclair ZX Spectrum Computer Sinclair 1982
Prototype Issue 2 ZX Spectrum Sinclair 1982
Sinclair ZX Spectrum Console Sinclair 1982
Sinclair TS2000 Sinclair 1982
Timex Sinclair 1000 Sinclair 1982
Sinclair ZX Spectrum 48k Sinclair 1st March 1982
Sinclair ZX Spectrum 16K Sinclair 1st March 1982
Sinclair ZX Spectrum Case (Signed) Sinclair 1st March 1982
Sinclair QL Sinclair 1984
Sinclair QL + SchÖn Keyboard Sinclair 1984
Sinclair QL (Property of Sinclair) Sinclair 1984
Sinclair QL (Signed) Sinclair 1984
Sinclair QL (US) Sinclair 1984
Sinclair ZX Spectrum+ Sinclair 1st June 1984
Sinclair ZX Spectrum +2 Sinclair 1986
Sinclair ZX Spectrum 128 Sinclair January 1986
Sinclair ZX Spectrum 128 Sinclair 1st June 1986
Cambridge Z88 Sinclair 1987
Sinclair ZX Spectrum +3 Sinclair 1st June 1987
Sinclair ZX Spectrum +3 (Currys Box) Sinclair 1st June 1987
Sinclair PC200 Sinclair 1988

This exhibit has a reference ID of CH21611. Please quote this reference ID in any communication with the Centre for Computing History.

 

Sinclair ZX81 Kit


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