Consumer Electronics

STEREO BALANCE INDICATOR

Most stereo equipment is fitted with a balance control to achieve aural equality of the two channels. Lack of sensitivity of the ear in detecting small changes in volume levels can make the operation of balancing somewhat tedious if precision is required and a visual indication that balance has been achieved will ease the task considerably.

 

 

Fig. 18.3 Stereo balance meter circuit

 

A simple meter circuit which may be used for balancing the outputs in a stereo system is shown in Fig. 18.3. Capacitors C1 and C2 damp the meter movement and resistor R1 is chosen to suit the current rating of the centre—zero moving coil ...