This Japanese radio is from the 60s, presenting excellent sensitivity and an output power of 100mW with 6 V power from ordinary batteries. The circuit is of the superheterodyne type.
This simple calibration circuit consists of a crystal oscillator that generates an accurate 100 kHz...
This circuit produces a low frequency magnetic field used in old inductive remote controls with a...
We found this circuit in a European publication from the 1970s. The transistor is made of...