This amplifier stage without an output transformer was found in Radio Electronics magazine from October 1963. The supply is 12 V, and the output is 8 or 16 ohms.
We found this circuit in the August 1970 issue of Radio Elecronics magazine. It uses the CA3018...
This circuit was found in a 1997 documentation. The signals are adjusted in a double 555 (556) and the...
This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a...