Originally Posted by
616jim
thanks to all who offered solutions etc. i rented the degaussing tool from Skyranch. it comes with a field meter. i got the area where the compass is located down to one small mark on the meter. i would hold the tool about 4' away, turn it on and then bring it up to the suspect area, then pull it away. the key is to diminish the field gradually. (i have heard of degaussing tools that turn off gradually, -- this one just had a switch). i've installed the PA 700 and after adjusting the N/S and E/W screws, got it to within 10 degrees. now i/ve got to find a compass rose. local airports have been seal-coated and covered the compass roses. (lots of federal money for airports in MN.)
again thanks. ps: I have found John at Skyranch to be most helpful and knowledgeable.