At 12:00, the top horizontal capacitor (Cc?) appears to be for coupling the signal to the circuit elements to its right. But, its connection on the left is to Vcc, which ideally should be steady DC supply. Perhaps instead of connecting the left end of the capacitor to Vcc, it should be connected between the transformer primary and the collector of the last IF transistor? Or, let the capacitor remain and add a series resistance between Vcc and the capacitor connection.
