Tuesday, 10 July 2012

50 Watt Power Amplifier Using Maplin Kits

In about 1984 I built a power amplifier for a school project using Maplin kits, 2 of these (the link has full instructions on how to build the kits). 18 Years on I decided to take a look at them and see if they still worked - they did but the wiring inside was pretty hopeless. I re-built the rectification circuit with dual rectifiers and snubbers, sorted out the internal wiring and replaced all the poor quality ageing caps in the important parts of the boards, added and mains-loop breaker. I also replaced all the audio connectors on the front but his was after the pics below were taken. The case isn't the most beautiful creation in the world but it sounds great!

 

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