This control for bass, midrange, and treble was found in the March 1995 issue of Electronics Now magazine. The circuit requires a dual power supply.
The output transistor used in this amplifier must have Vce of at least 200 V and Ic of 1 A and...
Found in a 1968 US documentation, this circuit shows how to use the resistance-scale multimeter to...
This filter is inserted between the interfering device and the interfering device. The coils are...