The circuit in the figure uses two operational amplifiers: an LM101A and an LM102. Diodes admit equivalents and resistors do not have to be accurate. The power supply must be symmetrical.
This conventional Hartley oscillator circuit with an audio output transformer was found in a...
In an article describing the assembly of a Tesla coil, the September 1991 issue of Radio...
This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated...