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.
Found in Motorola documentation from the 1980s, this circuit employs an integrated device from...
This input circuit for an oscilloscope was found in Radio Electronics from the 90s. The operating...
This circuit was found in Motorola documentation from 1968, using high power transistors and...