This circuit for a frequency of 40 kHz was found in an old Electronic Design. There were no constructive data for the transformer used in the output.
This setting appears other times in this section from other sources. This is from an 80's American...
This circuit, from a 1977 publication, allows to know if a bipolar transistor of general use is...
We show only one of the channels of an excellent audio preamplifier with the LM382 integrated...