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 found in a 1967 Philips publication. Transistors support equivalents and modern...
This circuit was found in the February 1991 Radio Electronics magazine. The circuit must be...
This circuit is a modification of the previous one, also found in the July 1995 Electronics Now...