Found in a 1924 publication, this 2-valve receiver has a speaker output. Power comes from several batteries. Information about the coils is given.
This circuit is from the LM101 manual. However, the configuration is valid for other operationals. The...
September 2016 - It can be obtained from Mouser Electronics a kit for developing wireless remote...
The operational amplifier of this circuit can be the 741. The circuit has very low consumption and can be...