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
http://www.mpt.go.jp/top/public-comment/public-comment000207.html
but it does not work I guess.
You might be interested in JA band plans which is available here.
http://www.jarl.or.jp/English/6_Band_Plan/JapaneseAmateurBandplans20090330.pdf
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
http://160mband.blogspot.com
On Mon, Dec 1, 2014, at 09:28 PM, JC wrote:
> Mike
>
> The DX Windows dated few decades ago, from the time US stations used to
> transmit 1800 to 1810 and listening in the DX windows 1825 to 1830 , all
> because the band was packed with LORAN signals, to work JA the DX window
> was
> 1907 to 1913. I may be wrong with some frequencies, Call CQ and tuning
> was
> actually try to find someone calling you back somewhere in the band.
>
> The original Idea is the DX (not US) to call between 1830 and 1835 but
> QSX
> down or up to RX.
>
> What is not part of the Gentlemen band is calling CQ and listen 3 seconds
> and call again and listen 3 seconds, .. There is no way to copy or to
> work
> any DX, just calling like a cw machine gun to hold the frequency . This
> kind of operational practice very common just keep the frequency busy
> with
> no QSO's and at a very low QSO rate. It is very common to hear and most
> of
> the time work DX station below those alligator's contest stations parked
> in
> the DX window.
>
> QRM the QRM'ers does not make it right as well, as we elected to be part
> of
> the Gentlemen band we should demonstrate it by example and some talk
> during
> eye ball QSO's.
>
> 73's
> N4IS
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Mike
> Waters
> Sent: Monday, December 01, 2014 10:27 AM
> To: topband
> Subject: Topband: ARRL 160m contest and DX Window?
>
> The ARRL 160 meter contest is this weekend. I know there has been a lot
> of
> controversy in the past about the 1830 to 1835 segment (the so-called "DX
> Window").
>
> I understand that if I am in the USA, the right thing to do is to NOT
> park
> in that window and call CQ (but I can answer a CQ from a DX station on
> another continent or island). The rule at http://www.arrl.org/160-meter
> simply states "*6.1. *The segment 1.830 to 1.835 should be used for
> intercontinental QSOs only."
>
> Maybe some of the more experienced Topbands could clarify this.
>
> 73, Mike
> www.w0btu.com
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