127MHz Folded Monopole Antenna For Airband

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KA0XR

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Thanks for the insight. Sounds like a one of a kind design even though it was marketed as a ground plane. If the impedance could have been matched and main lobe angle lowered by bending the radials down at 45 degrees, I wonder what advantage this "flat" ground plane design with the long radials may have offered, if any? Unless the horizontal radial design makes for easier handling & mounting.
 

majoco

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I made this folded dipole from a cut down TV antenna - kept the balun in the orange box and fed it with RG6 - seems to work very well only about 15 feet above ground. Although it looks like there is an insulator at the boom end in fact there is a wire jumper across the screws so it is continuous.

air band folded dipole sml.jpg
 

KA0XR

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So what frequency band did you cut that TV antenna turned folded dipole for and how is it performing? Design and mounting location resembles a DB-212 style that is used for lowband VHF. Looks simple and robust.

One follow up question, if the DB-201 is different from a normal 1/4 wave ground plane due to the longer radials, what would it be called? Or was this a "proprietary design " unique to DB Products/Andrew Antenna?
 
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