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FlightAware ADS-B Flight Tracking
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Please brows these posts. You may decide to build one of these easy DIY antennas. These cost pennies.

(1) Mag-mount Antenna’s Whip Replaced by DIY V-Stub Whip

(2a) Quick Spider With V-Stub

(2b) Comparison of V-Stub Quick Spider With Benchmark Antenna (FA antenna)