This circuit is suitable for the calibration of old analog oscilloscopes. It was found in documentation from the 1970s and could be useful if someone is recovering an oscilloscope of the time.
We found this project in a 2002 documentation. The transistor amplifier has a power of a few watts...
This circuit is from 1995 documentation. In the original, the source is symmetrical at 12 V, but...
Here we have a transceiver for the amateur radio range, which operates in the 40 m band (7 MHz),...