[RTTY] JA RTTY frequencies

[Bill Turner]

The Japan Amateur Radio Teleprinter Society (JARTS) contest is coming
this weekend. The JA band assignments for 80 and 40 meters changed a
few years ago and if you have not operated recently you may not be
aware of them. Here is a recent email from Hisami-san, 7L4IOU.

US stations please note that the upper 80 meter assignment overlaps
the US assignment by only one kHz. Be careful to keep both Mark and
'Space tones below 3600 kHz, and if you want JA's to answer on your
frequency, keep both tones above 3599 kHz. To be safe I would suggest
operating on a Mark frequency of 3599.5 to 3599.7 kHz.  With the
actual bandwidth of a 170 Hz shift signal being about 300 Hz, that
will allow a small "cushion" on either side.   

73, Bill W6WRT


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Hi Salvo-san, Bill-san,

Thank you for the kindly comments.
and We have some questions about JA Bandplan.
so I hope putting some info to guys who need low band QSO.

=== about JA Bandplan ===
We can QRV for DX QSO on 
 80m 3,520 - 3,575 and 3,599 - 3,612kHz
 40m 7,030 - 7,200kHz

you will found JA bandplan at 
http://www.jarl.org/English/6_Band_Plan/JapaneseAmateurBandplans20150105.pdf

with some note 
https://dl.dropboxusercontent.com/u/86270207/JA_Bandplan_w_memo.pdf
https://dl.dropboxusercontent.com/u/86270207/JA_New_BandPlan_2015.pdf

What is the sweet spot on these band?

=== about JA Sunrise ===
JA Sunrise and Sunset is 

QTH             Sunrise   Sunset (UTC)
-------------   -------   ------
East    (JA8)    20:51    07:45    
Tokyo   (JA1)    20:50    08:04
West    (JA6)    21:26    08:46
Okinawa (JR6)    21:29    09:00

73, Hisami 7L4IOU