Ranger (Texas Ranger) TR-966 Service Manual

Ranger (Texas Ranger) TR-966
Documentation Project
CBTricks.com
10kc Mod

NOTE:
Exercise a great deal of care with this mod especially with cutting the trace as specified!
Due to the placement, size, and close proximity of the surrounding traces.
If done wrong you could destroy the PCB and / or the PLL chip.

If you have even the slightest doubts or the proper equipment , it would be wise to have someone else you trust perform the mod for you.

SO TAKE YOUR TIME AND DOUBLE CHECK YOUR WORK!!!!

Changing the logic level of pin 16 on the RCI 8719 PLL chip will give you a +10kc or -10kc depending on channel selector. Cut the trace at pin 16 as shown and bridge the cut with a 4.7K ohm resistor. You can then wire the center contact of a spdt on-off-on switch to the PLL pin side of the 4.7K resistor Pin16. Wire one outside contact of the switch to Pin 9 for 8 volts and the other outside contact to Pin 18 for board ground.

Disclaimer: Although the greatest care has been taken while compiling these documents,

we cannot guarantee that the instructions will work on every radio presented.