CB Galaxy Saturn Repair: Eliminating Frequency Counter Noise
Some Galaxy Saturns tend to have a constant high pitched whine caused by the frequency counter module. Though this noise can't be heard while receiving a strong signal it is usually very prevalent while the radio is squelched. The above diagram shows a way of passing this whine to ground or at least greatly reducing it. The above filter will also greatly reduce most High-Frequency Noise and can be used on any radio for this purpose.
Next you will need to add additional shielding to the frequency counter module. Notice the opening just to the left of the wire harness plug. Although this opening isn't very large, it still allows a large amount of stray RF to be radiated from the module. The fix is to carefully cover this opening with a small piece of coax braid. Carefully solder each end of the coax braid to the metal can. Be sure that none of the braid touches any connections on the counter circuit board.