Miroslav Najman
@miroslavnajman.bsky.social
Analog electronics, Sun, Ionosphere, Propagation of radio waves, Beacon OK0EN, SID monitor, Doppler monitor. Electronic freak and radio amateur since childhood.
Pinned
I provide 24/7 service of Central Europe observation of ionospheric D-Region irregularities (Sudden Ionospheric Disturbance Monitor => Solar flare detection on Very Low Frequencies): ok1dub.cz/sid
Intense sporadic E layer traveling over Czechia yesterdays (07.01.2026) nigth (Doppler Monitor).
(ok1dub.cz/okxx/one_day...)
(lgdc.uml.edu/ionoweb/iono... )
(lgdc.uml.edu/ionoweb/iono... )
(ok1dub.cz/okxx/one_day...)
(lgdc.uml.edu/ionoweb/iono... )
(lgdc.uml.edu/ionoweb/iono... )
January 8, 2026 at 10:32 AM
Intense sporadic E layer traveling over Czechia yesterdays (07.01.2026) nigth (Doppler Monitor).
(ok1dub.cz/okxx/one_day...)
(lgdc.uml.edu/ionoweb/iono... )
(lgdc.uml.edu/ionoweb/iono... )
(ok1dub.cz/okxx/one_day...)
(lgdc.uml.edu/ionoweb/iono... )
(lgdc.uml.edu/ionoweb/iono... )
New beacons:
7017.2 kHz CW
RW6MHC
0.3 W
GP (1/4 wave)
LN17CM
H24
qrz.com/db/RW6MHC
10144.9 to 10145.4 kHz CW
SM7IGV/B
0.5 W
WIRE 5 m
JO76JU
H24
See: ok1dub.cz/ok0en/List_o...
7017.2 kHz CW
RW6MHC
0.3 W
GP (1/4 wave)
LN17CM
H24
qrz.com/db/RW6MHC
10144.9 to 10145.4 kHz CW
SM7IGV/B
0.5 W
WIRE 5 m
JO76JU
H24
See: ok1dub.cz/ok0en/List_o...
January 8, 2026 at 10:13 AM
New beacons:
7017.2 kHz CW
RW6MHC
0.3 W
GP (1/4 wave)
LN17CM
H24
qrz.com/db/RW6MHC
10144.9 to 10145.4 kHz CW
SM7IGV/B
0.5 W
WIRE 5 m
JO76JU
H24
See: ok1dub.cz/ok0en/List_o...
7017.2 kHz CW
RW6MHC
0.3 W
GP (1/4 wave)
LN17CM
H24
qrz.com/db/RW6MHC
10144.9 to 10145.4 kHz CW
SM7IGV/B
0.5 W
WIRE 5 m
JO76JU
H24
See: ok1dub.cz/ok0en/List_o...
Gander Radio on 11279 kHz / Long Delayed Echo
Reception of Gander Radio (ATC) on 11279 kHz.
Long Delayed Echo is presented on ATC transmission. Delay in first video is 620 msec. Delay in second video is 700 msec. Shortly before end of second video is ATC signal suddenly without any echo.
Reception of Gander Radio (ATC) on 11279 kHz.
Long Delayed Echo is presented on ATC transmission. Delay in first video is 620 msec. Delay in second video is 700 msec. Shortly before end of second video is ATC signal suddenly without any echo.
January 8, 2026 at 10:11 AM
Gander Radio on 11279 kHz / Long Delayed Echo
Reception of Gander Radio (ATC) on 11279 kHz.
Long Delayed Echo is presented on ATC transmission. Delay in first video is 620 msec. Delay in second video is 700 msec. Shortly before end of second video is ATC signal suddenly without any echo.
Reception of Gander Radio (ATC) on 11279 kHz.
Long Delayed Echo is presented on ATC transmission. Delay in first video is 620 msec. Delay in second video is 700 msec. Shortly before end of second video is ATC signal suddenly without any echo.
RSGB 2025 Convention - Travelling Ionospheric Disturbances: effects on HF propagation
(youtube.com/watch?v=CARl...)
(youtube.com/watch?v=CARl...)
January 8, 2026 at 10:09 AM
RSGB 2025 Convention - Travelling Ionospheric Disturbances: effects on HF propagation
(youtube.com/watch?v=CARl...)
(youtube.com/watch?v=CARl...)
NEW FORMAT of SSN file / VOAProp
Dear HAMs,
important information about funcionality of VOAProp software in new year you can find here: (ok1dub.cz/wwv)
Best 73 de Mirek OK1DUB
Dear HAMs,
important information about funcionality of VOAProp software in new year you can find here: (ok1dub.cz/wwv)
Best 73 de Mirek OK1DUB
January 8, 2026 at 10:07 AM
NEW FORMAT of SSN file / VOAProp
Dear HAMs,
important information about funcionality of VOAProp software in new year you can find here: (ok1dub.cz/wwv)
Best 73 de Mirek OK1DUB
Dear HAMs,
important information about funcionality of VOAProp software in new year you can find here: (ok1dub.cz/wwv)
Best 73 de Mirek OK1DUB
I provide 24/7 service of Central Europe observation of ionospheric D-Region irregularities (Sudden Ionospheric Disturbance Monitor => Solar flare detection on Very Low Frequencies): ok1dub.cz/sid
January 8, 2026 at 8:50 AM
I provide 24/7 service of Central Europe observation of ionospheric D-Region irregularities (Sudden Ionospheric Disturbance Monitor => Solar flare detection on Very Low Frequencies): ok1dub.cz/sid