Transponder Question
 

I am using a Tekno Conversion, and 3rd channel brake servo... Futaba 603FS Rx. What channel do I plug the transponder in?

You can plug your transponder into any open channel on your receiver since all it needs is power. Just be sure to plug it in with the correct polarity (positive to positive, negative to negative). The red wire is + and the black is -. Usually the outward most direction of your receiver is -. If you don't have any open channels, you can get a y-harness and split the channel into two. Traxxas makes a y-harness, not sure of the part number though.

I am pretty sure you dont have any extra spots on the receiver. Just get the Y connector that was mentioned above and you will be fine. I had to do that one day when I switched to a FM radio due to 2.4GHz antenna broke some how. Good thing I had my LST2 with me. It comes with that Y connector for 2 servo's and it work perfect for my truggy that day. Hope you have the extra room in the radio box for the extra wiring.