The inventor of BrickRknowledge about this book: BrickRknowledge allows in a simple way, with small modular construction-stones electronic Know-how and experiments. In this book, which is being extended by its own building blocks are developed so that certain functions can be realized. For this purpose, the term was introduced ify "brick". By Adding a few new elements can be a variety of additional experiments performed. You put the Knowledge in a small Container. Through the Design of new Bricks, the correct handling electronic components can be quickly and easily implemented, without, as usual, the whole circuit has to be laboriously soldered together. So you come from a simple measuring instrument up to applications with processors that control the developed System. The tube technology is not in this book short. It is today used only in the case of nostalgic tube amplifiers, but also in industrial applications, when it comes to performance. Tubes for radio Amateurs in amplifiers are very popular. In this paper tubes are used, which are operated with a battery voltage that is perfect for the Brick-System fit. Straight tube circuits with the Bricks is particularly easy to reproduce, understand, and modify. All in all, a successful factory that offers many electronics enthusiasts a large and interesting circuit collection, but also many of the experiments that are suitable for the deeper understanding of the technology.