Your story is not very clear 411A
Normally, a loop/sense antenna problem, however, on the L1011, it normally is a comparator problem. Change one box, problem solved.
Newer build aircraft and those so modified via service bulletin incorporated a comparator/resolver in the ADF system, to indicate a reversed sensing condition. It caused a flag to appear in the respective RMI indication.
What I understand you mean is that the comperator will cause a flag to appear on the respective (180 degree off) RMI.
But in that case how can replacing the comperator solve the problem of a needle pointing 180 degrees in the wrong direction? Seems like you are just trying to remove the flag.
Isn't the problem on the L1011 that the comperator is flagging an RMI, that is in fact in perfect working order?