This circuit covers the bands from 1.8 to 150 MHz, with plug-in coils whose characteristics are given next to the diagram. The FET can be a BF245. We found it in old documentation.
This circuit is based on an unusual component today. It demodulates a 10.7 MHz FI signal and was...
We can also use the 4011 on this CMOS circuit that makes use of a crystal headset. The power...
This circuit is from the 1983 Intersil Databook. In it we have the use of the ICL7135 as an AD...