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I have a ten inch section of atlas straight track that has been giving me problems.  I had trouble with engines stopping there in the middle of the track section.  I took it out of the main.  Using my vom I could not get a constant O reading on the ohm meter.  I would put one end of the probe on the center rail and then the other probe on the other end.  The meter would flash different numbers constantly and as I slowly moved the probe towards the other end of center rail it would never stop on a number steady.  I tried the outside rail and it would show 4 ohms solid as I slid the prob along and did this on each rail.

Suspecting the black rail had something to do with this I lightly sanded the center rail top until shinny.  Now same meter test again and still did the same thing.  I cleaned the top of the shiny steel rail with acetone and tried again and same thing.

I then checked another straight section of atlas track and the same thing, good outside rails and bad center rail.  Will call atlas and see what they say as I have quite afew of that track, some good but most bad.  It has been in the box for about 4 years.

Any ideas? 

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I really can't imagine anything is wrong with the track itself.  I tested one of my Atlas tracks it tested okay.  The center rail was a little irratic but I still obtained zero running one probe (with some downward pressure on it) along the entire surface, I did not clean the black off either.  Try the alligator clips as Earl suggested.  I would suspect the rails are not entirely clean as they should be?

 

Ken

It sounds like you sanded the entire center rail down to bare metal. If you did only a section, do the whole rail and check again. If you do not get any continuity with both probes touching bare metal, hook the transformer up to the section of track using alligator clips, and use the voltmeter function to check for voltage along the center rail. If you find any variations, that will pinpoint the section that is bad.

 

Larry

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