The Tube Map Radio is inspired by a diagram created by ... The other project called Denki Puzzles is equally remarkable. It’s a kit meant to teach electronics, using a set of snap-fit components.

According to [M Caldeira], the Blaupunkt Sultan 24300 was one of the last tube radios made in the 1960s. He’s got one but it needed some tender loving care, and you can see how he approaches a ...