This dual-gate FET RF signal mixer circuit was found in a 1980s documentation. The circuit is intended for applications in superheterodyne receivers of the time.
This circuit is from an American magazine that no longer exists, Modern Electronics, in a February...
Found in a 90s Popular Electronics, this circuit aims to find the voltage of a zener diode up to...
Found in a Popular Electronics from the 90s, this circuit is suitable for testing and tuning...