Spektrum DX3 CH3 Mod

[crazyjr]

Very nice BrianG, I never mess with the third channel. Too many bad optidrives.

[jhautz]

Excellent Work! That fixes one of the biggest drawbacks of that radio.

[BrianG]

Thanks guys!

@crazyjr: Yeah, the Optidrive is a nice idea in theory, but is prone to fail. All it is really is a reverse-lockout while the vehicle is moving. It can be removed as long as the user knows to wait until the truck fully stops before engaging reverse. Besides, the reverse gears and mechanism are really weak anyway.

@jhautz: I thought so too. I remember when I made by first BL Revo, I was going to use the shifting feature in the emaxx tranny, but decided that shifting it would be too much a PITA. So I didn't use it.

I don't know if I will ever use the third channel, but at least it is usable now.

Really, you could replace the existing switch with a toggle, but the little circuit board in my pics would have to be cut to allow clearance. Even then, you would no longer have the momentary effect if you decided you wanted it. And, if CH3 was set to either of the other two modes ("0" and "LN"), it wouldn't work right.

By the way, I tested to see what would happen if the toggle was switched one way and the existing one switched the other and nothing bad happens. So, there seems to be no danger whatsoever. The only gotcha in this mod is the placement of the switch; too high and it interferes with the circuit board - too low and it interferes with your thumb. :)