This circuit can generate signals up to 100 kHz. Found in documentation from the 1980s, it makes use of operatives of the time.
This circuit was found in Radio Electronics magazine from June 1961. The distance between stations is...
We found this circuit in a European publication from the 1970s. The transistors are made of...
This circuit is from a factory manual from the 80s. The circuit can be implemented with more...