This small audio amplifier uses an uncommon integrated circuit today. The circuit is from a documentation from the 70s and is indicated for portable receivers of the time.
Found in a Raytheon manual from the 1960s, this simple amplifier uses a metal rod attached to a...
We found this circuit in a publication for radio amateurs in 1977. The circuit allows the...
With this voltage regulator we can build a source of 1.7 to 17 volts and a maximum current of 1.5 A. The...