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  • Loksound question

    just installed a select micro v4. everything works but the loco stutters like the track is dirty. I cleaned rails and wheels, but still the same, however when I cancel the prime mover sound the loco purrs along at nice slow speeds. Am I crazy?
    Mark Dewalt

  • #2
    On many older layouts, and locomotives, the current pick up of locomotives is not very reliable with added sound. Therefore, power interruptions may cause a stop or jerky movement when the locomotive travels over turnouts at low speeds, or over the track at spots. This can be overcome with buffer capacitors (100 mF / 25V or higher show the desired results). If needed you may connect them to the LokPilot V4.0 or LokPilot micro V4.0. Also, Locomotives like Bachmann and Marklin have capacitors that need to be cut off the motor. When connecting DC and Coreless Motors, you may use all DC motors commonly used for model trains provided they do not exceed the current limit of the decoder.

    Like I said before, in some cases with the 5-pole High Performance Drives like by Marklin, you may find three anti-interference capacitors. The two capacitors connected directly to the motor leads and the motor housing must be removed for proper performance.

    I don't know what Locomotive you added the Loksound to, but if the Locomotive ran good before, than it is the added sound pulling away at the supplied power.

    The two capacitors that need to be cut out are pictures below. There are two capacitors across the motor circuit that drastically affects the speed curve when using a Quiet Drive decoder. It causes speed problems. They must be removed from the circuit. Do this by simply cutting the capacitors out . The capacitor is typically yellow and has a marking of 105.

    Does the Locomotive smooth out when more power is applied?




    Louis L&R Western Railroad
    Pacific Northwest Logging in the East Coast

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    • #3
      I have 8 or 9 Loksound equipped locomotives, all that I've installed aftermarket, and found out that with less than 100% perfectly clean track act the same as described. I added keep alive circuits to them and the difference is just amazing. I used TCS KA circuits, average $22 each. They are terrific and save your sanity by using them.
      Karl Scribner-Curmudgeon

      Cedar Swamp
      SW of Manistique, MI

      Avatar image by Savannah Lyn Burgess 7-15-2022

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