 Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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I have an analog 3106 steam locomotive that I want to convert to digital. I’ve already upgraded the motor but I bought a 60975 sound decoder to put into it but unfortunately it is too big. Can anyone recommend a smaller decoder (preferably with sound but not absolutely required) that might fit into this loc. The 60975 was a bit too tall. Thanks
Jeff
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 Joined: 04/12/2013(UTC) Posts: 2,261 Location: Hobart, Australia
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Originally Posted by: Mjn2ts  I have an analog 3106 steam locomotive that I want to convert to digital. I’ve already upgraded the motor but I bought a 60975 sound decoder to put into it but unfortunately it is too big. Can anyone recommend a smaller decoder (preferably with sound but not absolutely required) that might fit into this loc. The 60975 was a bit too tall. Thanks
Jeff Hi Jeff, The 3106 was the last steam loco in my collection that I converted from a previous 6080 decoder to a more modern digital decoder last year. I have converted many of my previous 6080s to more modern digital, usually using LokPilot with a 21MTC adaptor board but in this locomotive that arrangement was too tall, as you have also found with the 60975. I ended up using an ESU LokPilot v4.0 54616, removed the plug and wired direct to the various elements. Current equivalent would be the v5 59616. Regards, PJ 
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Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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Thanks, will I need a programmer with this one or will a mobile station 2 be able to find it?
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 Joined: 01/05/2016(UTC) Posts: 623 Location: Athens
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You can use the Marklin 60985. No base is needed and definitely there is enough space for the decoder and the small speaker. Also there is no need for programming
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 3 users liked this useful post by ktsolias
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Joined: 03/06/2007(UTC) Posts: 169
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I think you will find that the motor fits in the frame but the body doesn't fit over the motor. In mine, I remove some of the magnet with my milling machine. Rick 
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1 user liked this useful post by owidgie
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Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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Originally Posted by: ktsolias You can use the Marklin 60985. No base is needed and definitely there is enough space for the decoder and the small speaker. Also there is no need for programming Awesome thank you, I like that this one is prewired over the other that was suggested. Jeff
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1 user liked this useful post by Mjn2ts
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Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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Originally Posted by: owidgie I think you will find that the motor fits in the frame but the body doesn't fit over the motor. In mine, I remove some of the magnet with my milling machine. Rick The motor went in fine, the little diode/resistor on the top of the motor cover was a bit tight but a little filing on the inside of the body solved that. Jeff
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2 users liked this useful post by Mjn2ts
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Joined: 04/12/2013(UTC) Posts: 2,261 Location: Hobart, Australia
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Originally Posted by: owidgie I think you will find that the motor fits in the frame but the body doesn't fit over the motor. In mine, I remove some of the magnet with my milling machine. Rick Hello Rick and Jeff, I opened my 3106 today. My recollections were a bit of a "senior moment" in that I did not find the LokPilot/ 21MTC adapter too high, it was too wide, hence my change to a direct wired ESU LokPilot v4.0 54616 without the 21MTC adapter, splicing onto the previous wiring. I also now recollect that when initially fitted, the "motor" did appear too high to fit the plastic shell (but this was due to the brushplate and attachments being too high) and after inverting the motor unit (as can be seen from the side images below), it was an exact height to the frame and fitted fine. (I owe the idea of inverting the motor unit to fit in some steamers to Bigdaddynz) Koll's indicates only one version of the 3016, interestingly I see your frame is painted grey whilst mine is red. I seem to recall comments on this group before (I think perhaps from HO ?) noting that despite Koll's data, there are at times several variations in the locos of a seemingly unique catalogue number over time. Rick and Jeff, may I ask what is the running number of your loco?         Regards, PJ
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1 user liked this useful post by PJMärklin
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 Joined: 28/09/2019(UTC) Posts: 119 Location: Rogaland, Haugesund
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Hi
Depending on how you run your trains… (my trains ar set up permanently… same loco, same cars)
Then I put the decoder in the car behind the loco and exteded the wires as necessary..
Thor
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1 user liked this useful post by Tie
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Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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PJ,
Mine is also 78-355, although yours looks to be in better shape cosmetically. I didn’t realize you could mount the motor cover upside down but it must be difficult to get the brushes in.
Jeff
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1 user liked this useful post by Mjn2ts
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Joined: 04/10/2021(UTC) Posts: 56 Location: Maine, Lewiston
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Originally Posted by: ktsolias You can use the Marklin 60985. No base is needed and definitely there is enough space for the decoder and the small speaker. Also there is no need for programming Thank you for recommending this decoder, I was able to fit it in along with the small speaker with a very tight fit. This is my first steam loc with sound, is it normal for the 'coal dumping' sound to play randomly when the loc is running around the track??
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