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Author Topic: 5690KHz Japanese/English voice tx  (Read 1072 times)

Offline Looking-Glass

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5690KHz Japanese/English voice tx
« on: September 20, 2019, 0003 UTC »
At 1244z I happened upon two Japanese men on 5.690MHz USB in broken English and Japanese giving what appears to be a weather report, figures given were in mixed Japanese/English and also heard "QNH" mentioned.

Cannot find any relation to aviation on this frequency, found reference to European marine though in the past on this one.

Maybe this is a Japanese airline LDOC frequency? Then again marine?  However, the term "QNH" is used almost exclusively by the aviation sector and not marine. No Selcal check heard, both stations were in the order of 5X5 to 5X8 reports.

Maybe someone on HFU has reference to this one, especially the HF aviation diehards? ;)
Trundle, NSW.

Grid Square:  QF37ub

Yaesu FT-1000D, Yaesu FT-2000D, ICOM IC-736 HF/50MHz, ICOM IC R75 & Tecsun S-2000 to 450 feet of wire, 27MHz 1/2 wave CB antenna converted to 21MHz & a multi band vertical of dubious reliability.

Offline Exo

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Re: 5690KHz Japanese/English voice tx
« Reply #1 on: September 22, 2019, 2032 UTC »
This is an international standard "Aero Off Route" channel.

Generally open Aeronautical freq, but usually not LDOC or RDARA or MWARA.
It can be utilized by all types of aircraft and air-ground or aero comms orderwire (private, corporate, mil) entities.
Most of the "Aero Off Route" channel allocations are well known for mil air.

Other standard "Aero OR" channels may be found at 3.0 kHz intervals up from this channel.
etc.
5680 international AERO SAR channel with Maritime SAR interoperability (+/-4 kHz protection)
5684 "Aero Off Route"
5687 "Aero Off Route"
5690 "Aero Off Route"
5693 "Aero Off Route"
5696 "Aero Off Route"
5699 "Aero Off Route"
5702 "Aero Off Route"
etc.

« Last Edit: September 22, 2019, 2106 UTC by Exo »
Exo
HF aficionado. On the coast of northern California.
Various receivers, transceivers, and broadband antennas.
kiwiSDR receiver on private LAN for multi-freq HF monitoring.

Offline Looking-Glass

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Re: 5690KHz Japanese/English voice tx
« Reply #2 on: September 24, 2019, 2336 UTC »
Thanks EXO, much appreciated and mystery solved for me... 8)
Trundle, NSW.

Grid Square:  QF37ub

Yaesu FT-1000D, Yaesu FT-2000D, ICOM IC-736 HF/50MHz, ICOM IC R75 & Tecsun S-2000 to 450 feet of wire, 27MHz 1/2 wave CB antenna converted to 21MHz & a multi band vertical of dubious reliability.