Thanks for the comments thus far. I have bought an MRC decoder (I hope it's going to work OK, because I have seen a lot of unhappy comments about them), for my Atlas Dash-8. When I compare the two frames (The SD40 & Dash-8) they look very similar. The only defference I can detect is the length of the LED legs on the DCC board compared to the DC board. Do you think I could use the same decoder in the Intermountain SD40 as I have for the Atlas Dash-8 (once I get that one going), and just replace the LED's with the one on the DC Board (I am very good at soldering and I have a good, fine iron). Would this work? Any thoughts
Now that you have the decoder you have to find a small enough speaker to match.
Springfield PA
Does anyone know of a sound decoder for an N-Scale Intermountain SD40-2T? I have searched this forum and the net without success. The engine is DCC ready but I can't find any decoder that says it is made for it. If not, are the Intermountains compatible with any other makes (Atlas, Athern, etc)? Any help would be most appreciated.