I have a Rivarossi "Red Box" DCC-Ready FEF-3 that has an NMRA 8-pin socket in the locomotive. The space for the decoder is not very big so I probably need a "micro" (N-Scale) size decoder. The problem is how to add sound. I took off the boiler and looked at everything but it is so tight that it would be almost impossible to even get wires out of that area. So I was thinking that one way to do it would be to put a non-sound decoder in the space provided and then add a sound-only decoder in the tender.
Does anyone have any suggestions on a combination of decoders that will "play well together" to do the dual decoder thing (and what would be the least expensive way to do it? Or does anyone have any ideas on how to get a couple of speaker wires out of the area of this locomotive where the decoder plug is located? I prefer LokSound decoders but I don't think they have a non-sound decoder so that might be a more expensive way to go.
You may want to move your question the Model Railroader forums.>
And if you get an answer from those good folks at MR pass it on to Union Pacific. Who knows, it might prove useful on 844!
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