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I've overhauled about a dozen or more LW transformers including a whistle diode upgrade but this one has me stumped. I have fixed voltage from the C and B posts, variable voltage to about twenty volts from the U post, the fixed posts will move a locomotive but the variable post won't move a locomotive. Can't find anything loose or a poor solder point. 

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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