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 setting is valid for other transconductance operational amplifiers. The circuit is from...
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
This interesting multivibrator was found in an Italian magazine that no longer exists. This is...