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United We Stand Plaque Santa's CB Gift List RCI 6900F TB Frequency & Clarifier Mods RCI 6900F TB Photo Gallery Texas Ranger SRA-158 Stock Mic Review: RCI 6900F TB 10 Meter Transceiver RCI 6900F TB Tune-up And PCB Adj. Locations UPDATE: Maverick A24 Transceiver Kenwood UBZ-LH14 November 2001 Web Edition Star November 2001 Web Edition Star
RCI 6900F TB Frequency And Clarifier Modification by Bob F
Expanding The Coverage Of The RCI-6900F 1. Remove the 100 ohm resistor on the circuit side of the PC board. 2. Turn the radio over and move the connector with three wires from J5 to J29. The HI/LO switch becomes a frequency HI/LO control, doubling the bands from 6 to 12.
Figure 1
RCI 6900FTB Channel Figure 1
Clarifier Modification (Refer To Figure 2) 1. Carefully remove diode D63. 2. Cut the black wire from the connector on J10. 3. Solder this wire to the 8-volt circuit on the PC board. Now the fine clarifier will track and change the transmitter and receiver frequency.
Figure 2
RCI 6900FTB Channel Figure 2
Expanded Frequency Pool
LO
HI
1
24.265 - 24.705
2
24.715 -25.155
3
25.165 - 25.605
4
25.615 - 26.055
5
26.065 - 26.505
6
26.515 - 26.955 
1
26.965 - 27-405
2
27.415 - 27.855
3
27.865 - 28.305
4
28.315 - 28.755
5
28.765 - 29.205
6
29.215 - 29.655
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RCI 6900F TB Frequency & Clarifier Mods