The operational amplifier for this tone control found in a 1977 Signetics manual may be the 741. The power supply must be symmetrical and the signal cables short. The bass gain is 20 dB.
This circuit was found in the May 1982 issue of Radio Electronics magazine. The circuit inverts the...
This circuit must have its input connected to the collector of the last IF transistor of the FM...
The circuit shown can measure currents less than 1 uA and is powered by two 1.5 V batteries in a...