Using ZX Spectrum +2A/+2B/+3 power supplies | ByteDelight.com
Replacement PSU for +2A or +3 Machines - Spectrum for Everyone
Amazon.com: New 19.5V 11.8A 230W 7.4 x 5.0mm Charger Compatible with Chicony A12-230P1A AC Adapter for MSI GT72S G752VY GE63VR ADP-230EB T A230A006L A230A011L Adapter Power Cord : Electronics
ZX Spectrum PSU OLED Digital Black US - Replacement ZX Spectrum Power Supply, US Plug