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I own a Legacy CNJ F3 B-Unit (38760) that I am running with the A-A set of CNJ F3's.  When I ran the unit for the first time on our club layout yesterday, the coil coupler on the B-unit would occasionally open up.  This might occur every 10 minutes or so.  Is this a factory design error in the circuitry, or might there be a weak knuckle spring causing the coupler to open up?  Has anyone else ran into this issue with their Legacy B-units?

Last edited by Lionel16
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Originally Posted by Lionel16:

I own a Legacy CNJ F3 B-Unit (38760) that I am running with the A-A set of CNJ F3's.  When I ran the unit for the first time on our club layout yesterday, the coil coupler on the B-unit would occasionally open up.  This might occur every 10 minutes or so.  Is this a factory design error in the circuitry, or might there be a weak knuckle spring causing the coupler to open up?  Has anyone else ran into this issue with their Legacy B-units?

had a similar issue.  open the coupler by the remote and manually close the coupler as hard as you can.  re-open the coupler by remote and repeat.  do this several times.

I was told that this was the fix for TMCC locomotives and not legacy.I have a legacy engine in the shop right now for the same exact problem.I will let you guys know what happens.NickOriginally Posted by cjack:

There was a fix of installing a 1uF non polar capacitor across the leads to the coil...implying that they opened from brief electrical noise. Is that still the case?

 

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