hi, my radio is Sanwa MX3-X reciver rx451, question is can i plug my transponder into reciver straight? If yes where and do i need to turn on something in my radio wheel?

You plug personal transponders into an open channel in the receiver. So if you are not using channel 3 then use that spot. If you are using all 3 channels then you use the battery opening for a receiver pack.

yes but when i was trying to plug in transponder to 3 channel transponder lightwas flashing different like straight to battery, why?

i do not understand this. you plug the Transponder into the AUX plug on the receiver like you plug in your servo. make sure the wires face the same direction. its that simple.

i know what you mean. I just said when i do that my transponder starting flashing in different time like when i plug in into battery. That's all.. Falshing ebery 2 seconds 3 flashes. When is into battery straight then is flash every second. That's why i wasn't sure, i thought mayby is different voltage when is in reciver. That's all.

It shouldn't flash no matter what its plugs into... should just light solid

it should that is tc4 transponder.

I didn't "get it", I agree with AreCee. To me it sounded like you plugged it directly into a battery, not the batt. slot on the receiver...

The voltage in all the receiver slots should be the same since they are on the same bus.

Perhaps you plugged it in backwards (reversed the polarity).

BTW the new AMBrc transponders (the new tiny ones) do flash the led about every 2 seconds or so.

How do the MRT PTX-20 Transponders compare to the new AMBrc RC4's as the PTX seems a bit cheaper.

ok, now is ok, probably was changed polarity on aux2, on aux1 is ok. Thanks to everyone!

I have one of each and they both work fine at all of the tracks I go to.