5 Aug, 2005

Some people love valve amplifiers

7 Aug, 2005

10 Aug, 2005

It's 60 years since the first atomic bombs were used in warfare. Here's a look at two designs used and their deadly effect.

17 Aug, 2005

The impressive AWA Radiola B32 transistor portable

22 Aug, 2005

Want to build a valve stereo amplifier for your hifi system? This class-A2 triode unit produces 20W/channel and has good performance

23 Aug, 2005

It's easy to build, easy to program and can be set to give to sequential time periods of up to 99 minutes and 59 seconds. What's more, you can program it for up to 99 cycles of the time periods.

25 Aug, 2005

Carbon monoxide is an insidious poison which can - and does - kill. It's colourless, odourless and sneaks up on you! The first time victims become aware of carbon monoxide poisoning could be too late.

30 Aug, 2005

Want to control the water level in a tank, or detect a vehicle passing over a small-diameter hose? You can do both these jobs and much more, using pressure switches salvaged from old washing machines.

30 Aug, 2005

Tracking down a really rotten fault

31 Aug, 2005

This upgraded version of the Professional Sports Scoreboard now includes 2-digit fouls displays for the home and away teams.