We find this circuit in an American 80's documentation. No further information about the transformer is given. The circuit serves as a reference for any repair work.
Using old germanium transistors like the CK722, this circuit has good gain. We found it in a...
With the values of the components used in this circuit, the signal produced is 800 Hz rectangular with...
We found this circuit in an American brochure from the 90s. In it we have the way to implement a 4-input...