RCI 2950DX Clarifier Modification
The clarifier is quite simple also. Remove D63 located near VR8 TX Frequency pot. At J28 cut the black wire close to the connector and solder it to point marked 8V on J29. See photos below.
D63 Removed And Black Wire Cut
Black Wire Connection
Removing D63 disconnects the TX Frequency potentiometer from the clarifier circuit. Cutting the black wire removes the receiver 8 volts from the clarifier potentiometer. And connecting the black wire to J29 8V applies 8 volts constant to the clarifier potentiometer.