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Old 06-11-2018, 11:35 AM
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jhooten jhooten is offline
Join Date: Mar 2004
Location: Paige, Republic of Texas
Posts: 1,357

Once upon a time I took a yard sale cb, hooked it to the antenna, rubber banded the ptt switch, then walked a 500 foot diameter circle around the truck with a field strength meter in hand. The needle barely moved the entire time. So, I don't believe the mounting location on a pick up sized vehicle has as much effect on the pattern as cb legends would have you believe.

At HF frequencies the body of the vehicle acts as one plate of a capacitor insulated from the other plate, the ground below it, by the tire rubber. So, the vehicle body and the ground below it are all part of the RF ground system and have an effect on the radiation pattern.

I read it on the internet, so it must be true.
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