I got all 3 of them out today, and was trying to recall the history of how I ended up with 3?,...and which ones had what modifications??
If I recall correctly, I purchased 2 of them from Peach Creek Shops when they were closing. They were both brand new, and came with the stock 'DCC installed',.....just motor control, not sound.
I burned one of these up when it stalled out on a Shinohara double crossover during some turnout experiments I was working on Subsequently I was visiting with a gentleman south of me who promised to show me some introductory work on DCC installations,...and to sell me a few of his surplus (used) TSU 1000 decoders at a very attractive price. We replaced the burned out 4-8-4 Bachmann with one of those TSU 1000.
While we were at it I replaced the second new loco I had with a TSU decoder as well.
That left the 3rd one of those engines that I believe I bought thru the mail (craiges list or something) a few years ago. It came all packaged up as a new one would be, so I'm now thinking I must have never removed it from it box and done a thorough inspection?...strange??. Why do I say this? I unpacked it today and noticed it was missing the one, rear most wheelset on the tender. I then decided to open up the tender and do an inspection on its interior. This is what I found.
It appears as though the previous owner installed some sound capability, and perhaps changed the motion decoder?? The motion decoder I am assuming is the Digitrax DH-163. Is this original equip from Bachmann?
The sound decoder appears to be the Digitrax SFX-0416?
My question at this point is can I run this engine on a DC track (not DCC) without problems, or burning something up? In other words is this a dual mode decoder setup??