Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren't typical however, this is what it took to get its SWR low.
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About 440 Mhz J-Pole Antenna plans
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Antennas projects for 432-440 MHz that is about Antenna for 70 cm 432-440 MHz.
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440 Mhz J-Pole Antenna plans" has been followed for a total of 20829 times. So far received 51 votes for a total score of 4.80/10
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