We found this circuit in the Audio Handbook of the National Semiconductor of 1977. The circuit is used to recover vinyl media for recording on other media.
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...