European Ham radio portal

Antennas, radio stations and amateur broadcasting and reception

European Hamradio portal
DXbulletin LF+HF 

Conditions for the spread of KV according to the season

om0aao

I now have a chance at a DX QSO? It pays to call me on the band “CQ DX”? And on what band? To have a little idea of ​​your options in amateur radio bands, or you are currently planning tactics for the upcoming race, it pays to know what's going on in the ionosphere. The reach table by season and frequency can also help.

Typical spread during the spring and summer months
Frequency kHz 4000 4000 8000 8000 12000 12000 15000 15000
Hours after sunset Min Max Min Max Min Max Min Max
1 80 400 300 1500 800 5500 1200 10000
2 160 1000 400 2500 800 5500 1200 10000
3 160 1000 400 3000 800 5500
4 160 1280 400 4000
5 160 1500 400 4000
6 160 2500 650 5000
7 160 2500 800 5500
8 400 3000 1200 6500
9 400 4000 1200 6500
10 400 4000 1200 6500
11 400 1500 800 4000
Hours after sunrise Min Max Min Max Min Max Min Max
1 160 800 650 3000
2 0 160 650 3000
3 0 160 400 2500
4 0 160 400 2500 800 1500
5 0 160 400 2500 800 2500
6 0 160 400 2500 800 4000 1200 6500
7 0 160 400 2500 800 5500 1200 6500
8 0 160 400 2500 800 5500 1200 6500
9 0 160 400 2500 800 5500 1200 6500
10 0 160 400 2500 800 5500 1200 6500
11 0 160 800 800 800 5500 1200 10000
12 0 300 800 800 800 5500 1200 10000
13 80 400 1200 1200 800 5500 1200 10000
Directional antenna at 10m
Directional antenna at 10m

 

Typical spread during the autumn and winter months
Frequency kHz 4000 4000 8000 8000 12000 12000 15000 15000
Hours after sunset Min Max Min Max Min Max Min Max
1 160 1000 650 3000 800 5500 1200 10000
2 160 1280 650 3000 800 6500 1200 10000
3 160 1500 650 3000 800 6500
4 160 1500 650 4000 800 6500
5 160 1500 650 5000 800 6500
6 160 2500 650 5500
7 400 3000 650 6500
8 400 4000 800 6500
9 800 5000 800 6500
10 800 6500 800 6500
11 800 5000 1200 8000
12 400 4000 1200 8000
13 400 2500 800 4000
Hours after sunrise Min Max Min Max Min Max Min Max
1 160 1500 650 3000
2 160 800 650 3000
3 0 160 650 3000 5500 1200 6500
4 0 160 650 3000 800 5500 1200 6500
5 0 160 400 2500 800 5500 1200 6500
6 0 160 400 2500 800 5500 1200 6500
7 0 160 400 2500 800 6500 1200 8000
8 0 160 400 2500 800 6500 1200 8000
9 0 160 400 2500 800 6500 1200 10000
10 0 160 400 1500 800 5500 1200 10000
11 0 400 400 2500 800 5500 1200 10000

You can read about the spread on KV, for example, in the article by Milan OK1IF You want to win in contests? You just have “paddle”? How to choose racing categories? , In addition to the usual single and multi categories, IARU HQ stations also compete Monitoring of dissemination conditions whose SW for propagation conditions on KV , How to measure antenna quality? a Unpleasant prediction of dissemination conditions

You could take another look

Anténny tuner OM1AQA

OL Party results 2013

admin 0
Vývojové prostredie SP9UOB

The Polish stratospheric balloon starts on Saturday

admin 0
Anténny tuner OM1AQA

Evaluation of the OTC SARA Memorial – CW – 2017

admin 0