Blending in beautifully with this month’s focus on all things Audio I’d like to take you back to September 1975 when Elektor magazine published an audio amplifier named ‘Edwin’. 1975 was the first full year the English-language version of Elektor was published. Not surprisingly, the then editors looked at designs that had already proved extremely popular in the German and Dutch editions of the magazine, which had been on the market for some years already. ‘Edwin’ was a beefed-up version of an even older design which I have been unable to dig out of the archives. Compared to the earlier design, Edwin doubled the output power from just 20 to a mighty 40 watts (maximum).