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<p>This is a problem that I have had for the last couple of years and finally gave up on.  I purchased Soundtraxx PNP Sount decoders for 3 LIfelike GP9's about  2 or 3 years ago and retrofitted them into my GP9's that had DIgitrax DH163P decoders.  They havve never worked without stopping every couple of feet.  I went through the track cleaning, checking isolation from frames, gear meshing, and any other thing I could think of.  They have been on the shelf since that time.  I thought that I had a bad decoder but find it unbelievable that all three could be bad.  I have been using my digitrax decoders during this time with no problems except I have no sound.    My control system is Digitrax Super EMpire builder system with jumpers every 4 to five feet.  The stalling happens at randoms locations.  HELP!</p><p> </p>
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