Sean Thomas Thanks for the clarification on the vane. I have been using lvdts with on end of both the primary and secondary coils attached to ground. I think because of this the core had to be isolated from ground. I haven't noticed any particular problems and the calibration was quite linear. I did this by providing a acrylic tube break in the core brass extension shaft. I think if I provided a floating excititation and output condition I would have been able to ground the lvdt core. I will try this condition when I receive the transformers from Mouser next week and construct the vrdt Barry _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>