We found this circuit in a 1987 documentation. It is a multi-tester with neon lamp and LEDs operating with both low continuous voltage and high alternating voltage.
Although it is a common configuration today, this circuit was taken from an old publication. The...
This synthesized generator circuit was found in an article in October 1980 Radio Electronics...
This amplifier is specifically designed for portable radio and recorders with a 4 ohms load....