Quote from: Ralph S on July 06, 2025, 12:30:42 PMI wish to add a few $ cents to this topic. I have wrestled with this decoder issue for the few locomotives that I have purchased.
The manufacturers of locomotives, including Bachmann may be starting to add the type of decoder but few, if any, actually place the type of decoder plug installed on their packaging. What is meant by that is whether it's an 8-pin plug or 21-pin plug or even hardwired. I for one really don't look at the manufacturers catalog at the moment of purchasing to determine if the decoder in the locomotive has an 8-pin or 21-pin decoder.
When you examine the box (packaging) the locomotive is in, I haven't found any wording or indication as to what type of decoder plug is installed. The packaging only states whether it is DCC ready (requiring a decoder as an extra purchase). As for Bachmann's packaging it's DCC Ready and the packaging states (Sound Value, Wow or TSU2). Other manufacturers only state DCC control (no indication as to what type of decoder pin arrangement).
In conclusion, in my book of intermediate knowledge of DCC operated locomotives, all the manufacturers are very deficient in informing all hobbyist of the internal working of DCC and non-DCC components in the packaging of their respective locomotives.
With regard to Bachmann packaging...
If the box label says (DCC Ready) the chances are good it has an NMRA 8-pin
The 21-pin boxes are clearly marked on the front of the box in the top right corner "NMRA 21-pin plug"