The power supply for this 1972 circuit must be symmetrical and the BC549 transistors. Care with the layout is important to avoid capturing tinnitus.
This VCO or Voltage Controlled Oscillator uses an 8038 integrated circuit that is not very easy to...
This circuit was obtained in a 1978 publication, but it can be assembled with equivalent...
This circuit serves to reinforce the AM band signals for receivers that use an external antenna. The...