Brand: Sinclair Research Ltd.
Model: QL (Quantum Leap)
Country of origin: United Kingdom
Manufacturer: Thorn-EMI Datatech (Feltham, Middlesex)
Launch date: 12 January 1984
Board design: David Karlin
Software: Tony Debby (firmware/OS), Jan Jones (Basic)
Case design: Rick Dickinson
Dimensions: 475 × 139 × 46.5 mm (feet adds 2 mm)
Height with optional legs (included in box): 65 mm
Weight: 1478 g
Codenamed “ZX83” as can still be seen on the motherboard of early models after being called “Son of Spectrum” in a 1982 interview with Clive Sinclair.
For its serial and controller ports it used a 6-pin plug that looked similar to those of British Telecom phones, which could also be found on the ZX Spectrum 128: the ‘BT 631W’ for the serial port and ‘BT 630 W’ for the joystick. Samsung-made QL’s however used industry standard ports.
