Using the NE5205 integrated circuit this circuit was found in the May 1987 issue of Radio Electronics magazine. It can amplify signals up to 450MHz.
The timing steps of this circuit are indicated by a 7-segment display. The circuit was found in...
We found this circuit in a 90s Radio Electronics. The secondary current of the 110 or 220 V...
We found this circuit in a book on espionage from the 90s. The circuit has a counterphase...