that is a really large helical antenna as the video thumbnail. Probably the second largest i've seen a picture of. ADS-B isn't VHF, though; and i have antennas

that is a really large helical antenna as the video thumbnail. Probably the second largest i've seen a picture of. ADS-B isn't VHF, though; and i have antennas for working satellites. Not as large as that giant slinky, but still quite large.