Originally Posted by
snoopyrc
I have just recently recieved my RC4 decoder, and tonight I have mocked it up so that I can test in in the living room. In a mockup situation just passing the PT over the loop, the RC4 is registering the MRT transponder. Will this repeat itself in racing conditions? Who knows, but it looks promising. (Note: I am not talking about updated MRT transponders. Im talking about the old ones that are not supposed to read on an RC4.
Go figure.

My rc4 decoder was shipped without the latest firmware. We used it with MRT's for a few months before upgrading It. It also came with an expiration date that would brick the decoder if you did not install the new firmware.