JoulesperCoulomb

TEAC A-R600 Amplifier Repair. Part 1.

Experiments in Powering a Diesel Engine's Glow-Plug

ZX81 Video Conditioning

Hitachi HA-4800 Amplifier Repair. Part 2.

Hitachi HA-4800 Amplifier Repair. Part 1.

ZX Spectrum Initialisation and Investigating Initialisation & Memory Faults using a Logic Analyser

ZX Spectrum +2 Repair. (No. 7). Part 6.

ZX Spectrum +2 Repair. (No. 7). Part 5.

ZX Spectrum +2 Repair. (No. 7). Part 4.

ZX Spectrum +2 Repair. (No. 7). Part 3.

The Importance of Matching Series Wired Light Bulbs (...and why Xmas lights stay on when one fails.)

ZX Spectrum +2 Repair. (No. 7). Part 2.

ZX Spectrum +2 Repair. (No. 7). Part 1.

48K ZX Spectrum Repair. (No. 6)

Philips PM 3214 Oscilloscope Repair. Part 4.

48K ZX Spectrum Repair (No. 5)

Philips PM 3214 Oscilloscope Repair. Part 3.

Philips PM 3214 Oscilloscope Repair. Part 2.

Philips PM 3214 Oscilloscope Repair. Part 1.

ZX Spectrum Hardware Description

ZX Spectrum +2 Repair (No. 4). Plus a look at methods of improving picture quality.

Dismantling the Hitachi D-85S Cassette Deck

48K ZX Spectrum Repair (No. 3)

ZX Spectrum Power Supplies

48K ZX Spectrum Repair (No. 2)

Replacing Electrolytic Capacitors in a ZX Spectrum

Hitachi HA-4700 Amplifier Repair - Part Two

Hitachi HA-4700 Amplifier Repair - Part One

48K ZX Spectrum Repair (No. 1)