I have been looking into transponders and how to get the best results for the transponder pick up and found this:-
The usual place to fit these is in the bodyshell. The post has a hole for a large R clip to secure it. The optimum angle is for the post to point up or down. Slightly off the perpendicular is OK, so a shallow angled windscreen is a popular place. The signal is very directional and if you mount it with the pin facing forwards, backwards or sideways, very little signal will get to the loop, and you will miss laps. The reason the signal is directional is so the car counts when it passes over the loop, not when it is nearby.
The transponder must be mounted with the mounting pin pointing upwards or downwards and fixed with the proper ‘R’ clip. The transponder must be able to “see” the pick up loop. A good position ie: not above receivers, servo’s, batteries and wiring will help with the number of hits (time of contact x 0,01sec) as indicated by AMB software.
From reading this I have notice some people (including me) have mounted them at th wrong angle or over electrics.
This is something to consider when determining transponder positions.
