This circuit with 10 MHz and 1.25 MHz TTL outputs was found in an American documentation from the 1980s. The used integrated circuit is uncommon today.
This configuration can be found in other articles on this site. This was obtained in 1998...
This circuit generates both white and pink noise. The transistors can be BC548 and the power...
Found in 90s Radio Electronics, this shield can control high voltage loads in the power grid....