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WARNING! Mechanical alterations on the Tactic TTX850 radio requires opening the transmitter case. Failure
to follow all instructions below can result in permanent damage to the transmitter and void the warranty. Contact
Hobby Services if you do not feel comfortable that you can safely and
accurately perform these steps.
Case Separation and Disassembly
1. Make sure to fi rst disconnect the battery from the battery
compartment! Failure to do so could result in permanent damage
to the radio and void the warranty.
2. Remove the six screws from the back of the Tx case. Put the screws in a safe
place for later use.
3. Carefully separate the case rear away from the case front and note exactly how
all wires are routed inside the case. Taking a picture of the wires in place may
be helpful for re-assembling the case later. Do not disconnect wires from the
pc board.
4. Carefully lay the radio face-down on a soft non-abrasive surface, with the case
rear opened to expose the inside of the radio.
Throttle Ratchet Bar
1. A long metal bar will be installed vertically across the rear of one gimbal.
This bar provides resistance and a ratchet feel for the throttle control. Note
the small detent at the end of the bar. The tip of this detent points towards
the gimbal. Two mounting screws hold the bar into place. Remove both
screws and the ratchet bar from this gimbal.
2. Position the throttle ratchet bar onto the mounting post for the opposite
gimbal, making sure the detent in the bar points at the gimbal.
3. Insert both mounting screws. Do not over-tighten or cross-thread the screws.
Elevator Arm and Spring Removal
The gimbal now with the metal throttle ratchet bar will still have a plastic arm and spring for the vertical movement of the
stick. The arm and spring must be removed from this gimbal and moved to the other gimbal.
1. With a pair of hemostats or needle-nose pliers, carefully grasp the loop end
of the spring and slide it off the spring tension lever.
2. Lower the spring to slide the opposite loop end off the black plastic elevator
arm located downward inside the gimbal assembly. Set the spring aside.
MECHANICAL STICK MODE CHANGE
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