[RadioSvit]

One of the first mass superheterodynes in Germany is the four-tube superheterodyne Siemens 36VL of 1933. The main difference between this radio and classic superheterodynes is the intermediate frequency amplifier, detector and first low-frequency stage implemented on just one radio tube triode, which are implemented according to the scheme .... regenerator. ) It cannot be said that such a scheme greatly simplified the complexity of the design, but it allowed to reduce the number of radio tubes, and therefore the cost of the receiver. But at the same time it reduced the stability of its operation and reliability. Therefore, this radio has only two ranges Long and Medium waves, and its sensitivity is inferior to classic superheterodynes. Receivers of this type were manufactured only until 1935...36.
But... If we look at the chassis, we will see that this is a real solid Siemens...