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Old 06-21-2018, 7:55 PM
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jonwienke jonwienke is offline
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Quote:
Originally Posted by jhooten View Post
You have to scrape away the paint down to the bare metal for the magnet base to make good ground contact.
No. The sheet metal and the base of the magnet form the plates of a capacitor, which is designed into the tuning of the antenna. Scraping the paint off the roof defeats the whole point of a magnet mount antenna, and can actually detune the antenna.
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