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 is from the Linear Applications Handbook of the National Semiconductor of 1994. The...
We found this circuit in the National Semiconductor Linear Applications Handbook of 1994. The...
This Japanese commercial medium and short-wave radio uses 7 transistors and tunes the range from...