Late to the game I know. I wrestled with this years ago when I had a banjo signal. I ended up going the B-U route when A-U was being used to power the track. There were other ideas that I considered but did not get around to trying: 1) Use a relay off the track in conjunction with the C-D terminals; 2) Tapping into the track bus line (since I was operating conventional, typically in the 10-14 volt range) and 3) wiring the banjo in series with one on the other side of the track. Anyone try any of these?
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