Hi Maxx,

Back When I got my rc decoder I noticed the loop spacing in the manual was a little close... (amb 20 manual says 20" - 24"). I emailed them about it and David wrote back saying it was incorrect, and should be 20" - 24". ... One of my other race directors uses 21", so I've matched his.. as we share tracks. .. but I've seen post about all different widths...

Really don't think thats your problem though... usually high background noise comes from the COAX, splitter,.. or could be the BNC connector...(I have to replace one now). Check the resistance of the COAX at both ends. Should be 100K ohms + - 5%. Could even be the BNC on the decoder... have cleaned them with a q tip and contact cleaner.

If your BG noise is that high, you must be pulling your hair out!!! 20 to 25 is the norm... above 80 they usually stop counting.