This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is powered by 12 V and the power gain is 8.9 dB.
This circuit aims to digitally control several audio channels. The circuit is from American...
We found this configuration in an American 80's documentation. The circuit can be implemented with an...
This interference rejection circuit for telegraphy was found in a 1980s documentation for radio...