Bass control (CB8722E)

Found in a 1993 Electronics Hobbyst Handbook, this passive circuit can be used with common preamplifiers and amplifiers.

Monostable CMOS 2 (CB15922E)
The circuit in the figure trips with a negative transition of the input signal, its output...
Multifrequency Oscillator (CB15703E)
The basic frequency of this circuit is determined by the capacitor of 470 nF and the adjustment of the...
PNP Constant Current Source (CB1242E)
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...