This circuit is from a 60's documentation. The capacitance C1 can be between 20 pF and 0.01 uF depending on the generated frequency. Equivalent transistors may be employed.
The purpose of this circuit is to eliminate RF picked up by a turntable. The circuit is from a...
This old circuit, found in a 1975 documentation, was designed to limit, and filter signals from...
This circuit can be implemented with common components operating with low-intensity signals. The...