This amplitude modulated (AM) oscillator was found in an Electronic Design from 1965. The circuit uses components from that time.
This circuit can use NTCs from 200 to 680 ohms, just change P2. For 200 ohms use 330 ohms, for 250...
This circuit was found in an Electronic Design from the 90's. It makes use of components from the...
This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no...