This 90s Motorola circuit from, has current limiting foldback. The power transistor is from the era, and equivalents can be used. The output is 250 V.
This circuit in a receiver that allows the capture of distant stations with short waves. The...
This simple circuit of low power with an LM386 includes the highly sensitive audio preamplifier...
This circuit is from old documentation but can be applied to modern equivalent components. The...