Like all of my antennas, the NA-320A was hooked up to an antenna analyzer. It was Nanovna-F, tuned to scan from 144MHz to 480MHz. The SWR had a good 2:1 roll off at 145, 220 and 446. The antenna is used on the Baofeng UV5RX3 Tribander. I have a repeater that cannot be accessed with the standard antenna, so installing the NA-320A is a good test for range extension. The NA-320A made it to the repeater, so I'm happy with the upgrade.
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