This circuit was obtained from an American technical manual from the 80's. The integrated circuit is an operational of the time that can be replaced by a modern equivalent.
This 1995 circuit uses an audio amplifier that is no longer common today. However, other...
This circuit was found in the National component manual which is not currently simple to obtain....
April 2017 - Mouser Electronics already has the MAX4007 from Maxim Integrated in its inventory, an...