In fact, because it uses 3 tubes, 2 of which are double, it works like a 5-tube radio powered directly by the power grid. It was a receiver that in Brazil came to be known as a hot tail, as the resistance to reduce the network voltage for the filaments was built into the power cable (line cord resistor) as shown in the diagram. Thus, due to the fact that the power cable works slightly heated, it received the nickname “hot tail”. The circuit was for the medium wave band.
