@Robbin posted:Hi David, way late to this party but I am going through the same process now as you were. One thing I found very interesting (Warning, I am an engineer) was that the TMCC and Legacy are radio signals. Not at all like my DCC which was digital using the tracks to carry the signal which is picked up through the wheels. TMCC and Legacy uses the outside rail as an antenna (one half of the antenna with ground the other half) for a very low frequency radiated signal picked up by antennas in each loco. The TMCC radio frequency is somewhere around 100KHz (cannot remember exactly) which requires an enormous antenna to really radiate (3e8/1e5/2 = 1.5Km) so I suspect that it may be working like RFID which needs close proximity (you know, train on track). Neat system none the less which apparently Neil came up with working with some silicon valley pals that had helped start Nintendo and such. Who knew?
Here's a good page on how TMCC (and Legacy) work as far as track signals.
