*** Sinclair ZX81 Power Supply Adapter ***

About this deal

A power supply adapter for the Sinclair ZX81, the iconic British home computer released in 1981. The ZX81 requires a 9V DC supply with centre-positive polarity , and the original Sinclair PSUs were rated at between 0.7A and 1.4A depending on the version. This used adapter is a practical solution for collectors who have acquired a ZX81 without its original power unit, which can be tricky to source. The ZX81 itself draws well under the rated current of the supply, though users running the ZX Printer or other add-ons should ensure the adapter can deliver enough current to avoid overheating. The correct polarity is positive at the tip and negative on the outer sleeve , so buyers should verify this before use. As this is a used item, it is worth checking the cable and connector condition carefully before connecting it to your machine.