This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz signals are now received on a medium wave radio at 1 MHz.
We found this circuit in a 90's EDN. The circuit is based on a control integrated that is still...
In the figure we have the way to use the transistors of an old-paired pair as a trigger circuit. The...
This very high input impedance JFET circuit was found in the 1995 Encyclopedia of Electronic...