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The Timex Sinclair 1000 (TS1000) was the first computer produced by Timex Sinclair a joint-venture between Timex Corporation and Sinclair Research. It was launched in July 1982.The TS1000 was a slightly-modified Sinclair ZX81 with an NTSC RF modulator instead of a UK PAL (Units sold in Portugal have a PAL RF modulator) device and the onboard RAM doubled to 2K. The TS1000’s casing had slightly more internal shielding but remained the same as Sinclair’s including the membrane keyboard.