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Thread: ESU LokSound Select Direct Micro into an N Scale GP15-1

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    Default ESU LokSound Select Direct Micro into an N Scale GP15-1

    I used to own an GP15-1, but got rid of it. I have a hankering for it again, but this time with DCC and sound. I am going to purchase the ESU LokSound Select Direct Micro and install it into the GP15-1. I will let you know how it goes.

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    So I installed the decoder, and it cuts out every once in a while. I'm guessing this is a direct result of the way the chassis sits on the trucks.

    On normal Atlas locomotives, there is a spring above each truck that contacts the nubs on the truck for rail pickup. The nubs contact that springs at all times.

    On this locomotive, there are no nubs, only a flat surface that directly contacts the chassis. There are no springs. What I will do is solder magnet wire to the truck to see if that makes a difference.

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    Quote Originally Posted by gatrhumpy View Post
    What I will do is solder magnet wire to the truck to see if that makes a difference.
    Excellent idea.

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    Funny thing. I ran the locomotive the other way, and it ran well with no interruptions. Weird.

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    Quote Originally Posted by gatrhumpy View Post
    Funny thing. I ran the locomotive the other way, and it ran well with no interruptions. Weird.
    Mine acts oddly as well sometimes. I've noted that the trucks shift fore/aft depending on locomotive direction. Perhaps that's what causes the connectivity issues. At any rate, your magnet wire solution should sort that problem.

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    So I soldered on the micro wires directly to the trucks of the GP15-1, and it ran a lot better. I will also added 880uF of capacitance to the decoder as well on Wednesday when I'm in Salt Lake City for the National N Scale Convention.

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    I’ve seen some current keepers use both a capacitor and a resistor, e.g. the one shown in the ESU instruction manual. Is the resistor necessary?

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    Quote Originally Posted by danb View Post
    Is the resistor necessary?
    Yes, it is. It protects against in-rushing current to the current keeper from shutting down your DCC system when first starting up. Slows the flow of current into the capacitors.
    Last edited by Paul Schmidt; 19th Jun 2018 at 12:07 PM.

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    Anyone know how to hook up capacitors to the ESU Loksound Select Direct Micro by any chance (the board decoders)?

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    July issue of MR has something on that, IIRC.

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    Thanks Paul. I asked Rick at the National N Scale Convention and he helped me out.

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    gatrhumpy,

    I meant to ask you how hard it was to install and if any mods had to be done to the engine frame? Am asking as I am contemplating putting this exact decoder into a Kato SD70M.
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    I did not have to modify the frame at all. I did have to add Kapton tape between the motor tabs and the frame. I also had to add a drop of solder on the right and left rail solder tabs on the board so they made better contact with the frame. With this engine being as short as it was, I had to modify the speaker enclosure a bit to grind it down a little so it would fit under the board. I also found space for 660uF of capacitance on this engine as well.

    You should have no problem installing this on your Kato. Just follow directions and test the continuity between the motor wires/tabs and the frame and any light hookups.

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    Any pictures to share?

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    Gatrhumpy,

    Thanks for that, it gives me more confidence for the install. As danb asked, did you take any pics of the install you could share?
    Cheers Tony

    "Knowing what to do is one thing ... being able to do it is another"
    "It is easy to criticize ... a lot harder when you have to justify it"

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    I just finished one for a friend of mine. I like how it sounds but on the others I am going to try constructing a enclosure after milling a little of the back end!
    Attached Images Attached Images
    GM50 4164
    Benjamin H

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    Nice job!!!!

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    Quote Originally Posted by GM50 4164 View Post
    I just finished one for a friend of mine. I like how it sounds but on the others I am going to try constructing a enclosure after milling a little of the back end!
    What speaker was that you used?
    Also looks like you soldered on new LEDs?

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    Quote Originally Posted by DasBok View Post
    What speaker was that you used?
    Also looks like you soldered on new LEDs?
    I used a 9x16 for the first one I installed. This speaker comes with a adhesive gasket that I just affixed some styrene to. I did end up doing several more and with those I milled what I could from the rear of the frames and built a speaker enclosure. I also added ditch lights to one of these! GP15-1a.jpgGP15-1b.jpg
    GM50 4164
    Benjamin H

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