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 was suggested by Linear Technology in a 1980s documentation but can be implemented with...
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...
Unlike the previous circuit, this circuit has a low impedance input. The components can be changed to...