This circuit, obtained from an Argentine publication in the 1960s, used a German transistor in its original version. However, it can be implemented with a silicon transistor. The transformer is obtained from a common radio transistors oscillator, but it can be improvised by wrapping the 300 high primary cables 32 and the 20 + 20 cable coils 28. You must be careful with the phase so that the circuit oscillates.
