LF: Korea 24.1 kHz and 25.0 kHz

[Markus Vester <markusvester@aol.com>]

I looked through some stored colour-DF grabber captures. It seems that the South Korean transmittter has been alternating between 24.1 and 25.0 kHz on a monthly basis. As far as I can see, the scheme was

Month in:  ------2017------|-------2018-------
25.0 kHz:    7 8 9         | 1 2 3       7   9
24.1 kHz:  6       10 11 12|       4 5 6   8

Best 73,
Markus (DF6NM) 


-----Ursprüngliche Mitteilung-----
Von: P. W. Schnoor <pws@df3lp.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, 8. Aug 2018 22:50
Betreff: Re: LF: 24.0 kHz sig - NAA?

O.K.

Go to:
https://groups.yahoo.com/neo/groups/VLF_Group/conversations/messages/25189

Read those ITU infos.

Push: "Show message history"

Read what Markus wrote there.

May be he describes exactly what R6LDD's image shows.

Peter, df3lp

On 08.08.2018 19:01, hvanesce@comcast.net wrote:
> In the mid 60's I wished that my receiver (BC-453/4/5) would reach 24 kHz.
>
> Still works and still wish; that much stayed the same :-)
>
> Jim AA5BW
>
>
>
> -----Original Message-----
> From: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of John Rabson
> Sent: Wednesday, August 8, 2018 12:32 PM
> To: rsgb_lf_group@blacksheep.org
> Subject: Re: LF: 24.0 kHz sig - NAA?
>
> How times change. In the late 1960s I received NAA on a hot summer afternoon
> in the town of Harlow, about 30 km north-east of London. The antenna was an
> L about 80 m in length and the receiver was an ex-Navy unit which covered
> from 15 to 750kHz (B29?).
>
> 73 John G3PAI F5VLF
>
>> On 8 Aug 2018, at 17:49, DK7FC <selberdenken@posteo.de> wrote:
>>
>> Hello Genosse Roman,
>>
>> NAA should be centered exactly at 24 kHz, like DHO38 is at 23.4 kHz. It
> can have strong QSB and appears only a few hours per day. Here it appears
> arround 4 UTC these days.
>> My grabber and all webpages do not work in the moment due to a webserver
> problem which may be solved just next week...
>> These narrow traces are something else, NAA always looks like DHO, about
> 200 Hz wide.
>>
>> 73, Stefan
>>
>> Am 08.08.2018 14:15, schrieb Roman:
>>> Hello Genossen VLFers!
>>>
>>> Pse, look R6LDD screen at russian forum.
>>> What's a station? NAA or not?
>>>
>>> http://136.su/index.php?action="">
>>>
>>> The theme:
>>>
>>> http://136.su/index.php/topic,393.msg21804.html#msg21804
>>>
>>>
>>
>
>
>