[TowerTalk] Ground for screwdriver antenna

[Donald Inscho]

I have a screwdriver antenna that will not tune on a 1997 Nissan Quest.  
I move the coils up and down and still receive the same swr reading for 
each ham frequency band.  For 18 meters 1.5 to 1, for 21 meters 1.8 to 1 
and the rest of the bands are all infinite swr.  The manufacturer of the 
antenna says it must be a body rf ground problem.  What are your 
opinions?  I have tried to screw the antenna rf  ground to different 
part of the car body but I have little change.

Don Inscho N3OSO