Matching antenna (CB7458E)

The coil and sockets of this circuit found in a QST depend on the frequency band that is intended to be tuned.

AC and DC Full Wave Rectifier LM741 (CB25221E)
This circuit with two operating modes was found in the September 1989 issue of Radio Electronics...
Event Detector (CB16936E)
This circuit was suggested by old French documentation, but it can be used as a shield, in which...
Who is the fastest Game with SCR (CB3857E)
This well-crafted speed game setup for two competitors was found in a 1998 Poptronics. The circuit...