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Re: Topband: ARRL 160m contest and DX Window?

To: topband <>
Subject: Re: Topband: ARRL 160m contest and DX Window?
From: Mike Waters <>
Date: Wed, 3 Dec 2014 14:45:32 -0600
List-post: <">>
Thank you, Petr. Some of this is mentioned at which I have
hanging next to my radio. The 1830-1835 DX Window is on that chart, and
that's one of the reasons I had this stuck in my head. :-)

73, Mike

On Tue, Dec 2, 2014 at 3:52 AM, Petr Ourednik <> wrote:

> Hi all,
> the split JA operation schema for decades ago was:
> JA TX > 1907.5 - 1912.5kHz and listen for rest or worls in between 1820 -
> 1825kHz.
> This "JA window" 1907.5 - 1912.5kHz has been not used in contests from
> 1999 by JARL because the band was too narrow. The SSB was not permitted.
> I worked several JA topbanders over there split down to 1820 - 1825kHz.
> According to the Ministry's announcement, effective April 1st 2000,
> additional 15kHz, i.e. from 1810 kHz to 1825 kHz, has been allocated for
> amateur radio use. The announcement was available in the Japanese language
> at but
> it does not work I guess.
> You might be interested in JA band plans which is available here.
> Some additional notes to the figure:
> NB Phone = SSB, AM
> NB Image = SSTV
> NB Data = RTTY, PSK31, JT modes etc
> (but no RTTY on 2200 and 160m)
> WB Phone = FM
> WB Data = Packet
> (tnx to Rin, JG1VGX)
> Regarding the DX window down on TB I am trying simply not calling CQ in
> between 1825 - 1835kHz from EU. In fact my CQ is even not so effective from
> my fixed QTH as my receiving performance is not the best so I would not
> like to bother on the band when I am not able to
> hear weak sigs coming back.
> In general calling CQ with just few sec of hearing to repeat CQ again is
> terrible technique which is not applicable on TB I guess. When I am calling
> CQ I am trying to listenning with switching between all of my RX antennas
> combination to ensure that nobody is calling me... so in
> my case I need to listenning between each CQ at least 30-45sec I guess.
> Also there are bad spots (forbidden QRG) on TB which should be avoided for
> CQ.
> 1820 is often jammed by radar from China in JA
> 1818 strong QRM from local GPS correction on 1818 in ZL
> To keep the Gentlemen band (better to say > give it back to the old ages
> Gentlemen shape) we should
> strictly observing basic gentlemen agreement...
> My 2c...
> 73 - Petr, OK1RP
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