This converter has coils according to the reception and converted frequency bands. We found it in the October 1989 Radio Electronics magazine in an article that teaches its construction.
This is an old 1988 circuit consisting of a timer or time control for exposing silk-screen arrays. The...
This circuit was found in a 90s Silicon Chip documentation. The current of the transformer is 1 A maximum,...
This circuit with output powers of 2 to 3 W depending on the power supply was found in the...