VLF NPM 21.4 kHz with IQ video

NPM is a USA Navy VLF transmitter that operates on 21.4 kHz. It's located in Lualualei, Hawaii.

21° 25' 22" N  158° 9' 1" W

The station's current antenna was built in 1972 and consists of two guyed masts, each 458.11 meters (1503 feet) tall. The masts are configured as umbrella antennas.

Lualualei VLF transmitter

NPM is over 2,400 miles from my QTH: Camas, WA USA

KiwiSDR antenna is 39" dia. loop (49 turns of 22 AWG Magnet Wire) up 10'

73 David WA9ONY



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