ZX Spectrum Power Supplies
18:44
48K ZX Spectrum Repair (No. 1)
8:39
48K ZX Spectrum Repair (No. 3)
1:12:39
Linear DC Power Supplies - Designing & Building Custom DC Power Supplies
36:05
Fixing a special ZX Spectrum
47:35
Rebuilding A Commodore 64 Power Supply
38:13
A Very Faulty ZX Spectrum!
9:57
How to test a ZX81 Power Supply
35:20