Thank you, Petr. Some of this is mentioned at http://www.pacificdxpedition.com/download/160m-frequencies.pdf 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 www.w0btu.com On Tue, Dec 2, 2014 at 3:52 AM, Petr Ourednik <indi...@xsmail.com> 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 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 > _________________ Topband Reflector Archives - http://www.contesting.com/_topband