Found in a 90s Elektor, this mixer makes use of integrated circuits of the time. The supply must be symmetrical at 15 V.
This circuit was found in a 1963 publication. Its purpose is to convert sinusoidal signals from...
Found in a 1967 Electronics World, this preamplifier uses an integrated circuit from that time,...
Found in a documentation from the 90's, this circuit already includes an amplification stage. The...