This circuit was found in an Electronic Design from the 90s. The integrated circuit is the LT1016, a high-speed comparator of the time.
This 1987 signal injector included the power supply from the power grid. The transformer is 6 + 6...
This amplifier was found in a 70s documentation. The product gain x bandwidth is 350 MHz. The...
This simple receiver with junction FET uses a high impedance magnetic earphone (over 2 k). Power...