This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This circuit using current components was found in an old documentation. It is a sequential circuit...
This circuit of the 1970s uses Germanium transistors. Changes can be made to use silicon...
Found in a 1970 documentation this circuit makes use of components still common in the market. The...