This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s documentation. CN is the neutralizing capacitor.
The battery is charged by the photocell that keeps the low consumption beacon in the dark. The...
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
This is the typical circuit of an FET amplifier stage in the common source configuration. The circuit is...