The spiral is actually cut into the stainless shaft that the antenna is
made from. The end ball and the mounting screw fitting with locktite are
then pressed on. Then it goes through a wash and pretreat and then
through a powder coat booth. Ford and Chrysler were the first to use the
spiral cut to both reduce wind noise and to reduce antenna harmonic
motion due to wind drag. GM followed VERY shortly, The only real
drawback is the spiral cut antennas are not as strong as the standard
shaft units and they make lousy window breakers ( take a course on EMS
vehicle extrication for that neat trick ) because of it.
Oh and if you own a Ford or Chrysler with a fixed antenna it was
probably made in Amsterdam NY by Ward Products. The chrome or black
spanner nut securing it was produced by Manth/Brownell near Kirkville
NY. It was also painted by either WW Custom Clad or Sumax powder
coaters. And at least 30,000 of them were scrapped after WW had a fire
that damaged the coating after they were processed.
> > "Adam" <abomb6900(zerozero)@verizon.net> wrote in message
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