This audio mixer was found in an old American documentation. The potentiometers are 1M and the input capacitors are 100 nF. The circuit requires power supply voltages from12 to 18 V.
September 2016 - can be found at Mouser Electronics the new amplifiers with digital variable gain...
This receiver was found in an article in Electronics Now magazine in March 1994. The coils are...
This alarm circuit has a trigger delay system. The circuit was found in a Popular Electronics of the 90s....