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.
We found this circuit in a year 2000 documentation. It must be powered by a voltage of 5 V as it...
This circuit found in the February 1992 issue of Radio Electronics magazine is designed to adapt an...
The LM109, which is not common today, was manufactured by many semiconductor companies. This...