第34回1エリアAMコンテスト 結果 ― 2019年09月15日 17時39分44秒
JTDXにFT4 ― 2019年09月15日 17時04分39秒
ハムフェア参加しました ― 2019年09月02日 17時19分36秒
遂に負けました〜〜 ― 2019年08月28日 14時13分19秒
今年のハムフェアは ― 2019年08月26日 23時03分09秒
それではQSOできないです 2 ― 2019年08月26日 22時57分34秒
JTDXのFT4搭載について ― 2019年08月12日 12時43分12秒
we monitoring statistics and have not seen more than 10% FT4 spots at peak from FT8 activity. Taking in account twice shorter FT4 interval FT4 activity did not exceed 5% at it's peak of FT8 activity levels.
Assuming FT8 HF bands are being saturated, there is a great chance to get 50% more FT8 spots if FT8 bandwidth increased twice.
So far there is no reason to invest time in FT4 implementation in JTDX as similar to JT65->FT8 transition we will have to interrupt FT8 decoder development while FT8 now has greater usage.
It has taken almost two years of team work to bring FT8 decoder to current sensitivity&efficiency in JTDX, do not expect FT4 decoder will be shortly improved and could compete with FT8 one. Also keep in mind that communication radius in FT4 also depends on the activity level, once bands are overcrowded the radius could decrease to intra-continental communication.
73, Igor UA3DJY
6m 夏至 冬至付近のアクティビティー ― 2019年07月22日 19時24分37秒
6m band activity during the summer solstice and winter solstice seasons ― 2019年07月22日 19時16分06秒
Amazing propagation. 6m band EU - VK opened.
S59A S58J DK8NE reported in VK3.
Maybe there is a path between Japan and South Africa. It seems that no one is operating in South Africa.
In the Northern Hemisphere, the number of operating stations increases near the summer solstice (June July), but not so much near the winter solstice (December January).
In the Southern Hemisphere, there will be more operational stations in December and January, but not much in July.
In June-July and December-January, If activities increase in both the northern and southern hemispheres, there may be more chances to QSO.
This summer June - July, we have had many opportunities to QSO with VK and ZL from JA.
If the activities of ZS and other African stations go up, there may be QSO possibilities not only for Europe but also for Far East Asia.
The same goes for South American stations. In fact last July I have received HK3W.
As it has always been said, the season for the 6m band is not only a summer. Winter is the second season.
If 6m band enthusiasts around the world raise activities during the summer solstice and winter solstice seasons, we may enjoy some special propagations, I guess.