HD2IOA

HD2IOA is the callsign of a time signal radio station operated by the Navy of Ecuador.^[1] The station is located at Guayaquil, Ecuador and transmits in the HF band on 3.81 and 7.6 MHz.^[2]

The transmission is in AM mode with only the lower sideband (part of the time H3E and the rest H2B/H2D) and consists of 780 Hz tone pulses repeated every ten seconds and voice announcements in Spanish.

While sometimes this station is described as defunct, reception reports of this station on 3.81 MHz appear regularly at the Utility DX Forum.^[3]

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^ Instituto Oceanográfico de la Armada, Casilla 5940, Guayaquil, Ecuador
^ Gerd Klawitter (1980). List of Time Signal Stations (9th ed.). p. 22.
^ Recently, logs of HD2IOA appeared at the UDXF in March 2008.

v t e Time signal stations
Longwave	BPC BPL BSF Beta DCF77 JJY RBU RTZ TDF time signal Time from NPL WWVB
Shortwave	BPM CHU HD2IOA HLA JN53DV ROA Time RWM WWV WWVH YVTO
VHF/FM/UHF	Radio Data System
Satellite	BeiDou DORIS GLONASS Galileo Global Positioning System IRNSS Quasi-Zenith Satellite System
Defunct	BSF HBG NAA OLB5 OMA Radio VNG WWVL Y3S

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This page was last edited on 24 November 2023, at 13:45

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