We found this circuit in a 1976 documentation. The FET can be BF245 or MPF102 and the power supply need not be symmetrical. The FET in the feedback acts as an automatic gain control.
This 5-transistor receiver for the medium wave range was described in an article in Radio...
This circuit is from an American publication from 1978 and can currently be assembled with minor...
Although ECL logic is rare (no longer used), this circuit from a 1992 documentation shows how to...