How to run more than 3ch with 3ch radio?

[redrocks]

I have asked some one if it is possible to run say 4-5 different channels with a 3ch radio before and they said I would need a 555 servo to keep rear steer straight when not being used and just run a manual switch to pick which feature is being used. Is this possible? I've never heard of a 555 servo but I do see I'll need a signal to keep the rear in place. I have searched google like crazy and have found may drawings on making one but I really would just rather buy one, anyone know where I can? I'm trying to run rear steer, then be able to switch to front dig, and maybe a winch just for kicks. Any info would be great, thanks!

[Timmahh]

your best option would be the PUNK RC servo stretcher. from my understanding it does just want you want, by making one channel *(say your 3rd cnl) usable on 2 things, like steering and winch or Dig.

its the only thing im aware of that will do most of what your looking to do.

[redrocks]

Where can I pick one up? Is it something that goes on the radio or the truck?

[Timmahh]

search PUNK RC here on teh forum. i dont own, have used, or seen on personally , but understand it works great. i believe it goes to the RX channel you want to "stretch" (ie use multiple things on like Dig/Winch).

[redrocks]

I found someone on here that has one and says it only lets you do right, left, and neutral. He said it wouldn't work. I have never hard wired a servo, but is there a way to say cut one wire that would keep it from getting any signal other than being on (to not move). If so I could wire a switch that would turn off the signal wire to the rear steer and turn on another servo. Just a thought would be great if it's possible but I don't know exactly how the three wires work.