Thanks, I have my ground under the overhead tracks. Its just one for 3 tracks. There is a 1/2" plywood and 1/2" foam and 1/4 inch roadbed plus the gargraves ties under the rails which is probably 1.5 to 1.75 inches to the middle track it is under. So is that far enough not to trigger attenuation? Is one ground wire sufficient for all 3 tracks? I will have the signal buffer as soon as it arrives with your modifications.
Thanks,
GREG.