1977, can't remember exactly but I'd likely have been learning the basics (at just under 4 years old!) of electrical wiring, 4 1/2 volt batteries, lamps (I learned early they aren't called 'bulbs'), switches and wire. I remember you could buy little round switches like mini versions of the round tumbler light switches.

Trumpy, yes, I had that very book, and tried to build the radio. I had no problems building the crystal set that if I recall correctly began the radio project, but then had to add an OC71 transistor. The local radio shop chap had some, so I bought one, and broke off one of the legs in my enthusiasm to fit it. I can still feel the frustration now. But that radio DID work, so long as you poked the wire into the broken off stub of the leg [Linked Image]