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Author Topic: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024  (Read 314 times)

Offline Ray Lalleu

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UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« on: February 24, 2024, 1607 UTC »
on 6270.5 NBFM
1605 music, on side of AM mode here, better on KiwiSDR, non stop rock,
1627 short audio off, then back
« Last Edit: February 24, 2024, 1630 UTC by Ray Lalleu »
D/E/F/G/It/Sp : Dutch/English/French/German/Italian/Spanish
+/- : about 0.02 offset, ++/-- 0.03/0.04 offset
Balanced wire antennas, wire lines and ATU
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Offline Fisherman

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Re: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« Reply #1 on: February 24, 2024, 1658 UTC »
Still there at 1657 with heavy rock and noisy signal
Listening to Short and Medium Wave broadcasts since 1962 as a DXer. Nowadays I listen to 48 and 49 meters mainly for interesting stations. If you like to send me an EQSL my email is bkavana@yahoo.com

Offline n2avh

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Re: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« Reply #2 on: February 24, 2024, 1749 UTC »
Still there 1747, that frequency is best but not a weak signal from Dutch SDR I'm using on NBFM so not sure why it's still so distorted.  Also not sure where they would get a NBFM tx for that part of the spectrum, or who they think would be able to listen besides the SDR crowd.
Big into SWDX late 70s through early 90s, then forgot about it and when I returned via SDRs it wasn't at all what I remembered, but I'll deal with it. Grumble, grumble. All SDRs acknowledged, nothing is from my own radio.

Offline Ray Lalleu

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Re: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« Reply #3 on: February 24, 2024, 1753 UTC »
Maybe this station uses a modified amateur TRX ?
Many recent ones include NBFM, and they can be opened to operate on any frequency.

edit : with fading, the recovered audio is often replaced by strong white noise. A receiving antenna for circular polarization would be better to avoid the fading.
« Last Edit: February 24, 2024, 1809 UTC by Ray Lalleu »
D/E/F/G/It/Sp : Dutch/English/French/German/Italian/Spanish
+/- : about 0.02 offset, ++/-- 0.03/0.04 offset
Balanced wire antennas, wire lines and ATU
*** Mes pages ex-OEM : semaines des OC, radios-médias, techniques de réception, en français, demandez  les ! ***

Offline n2avh

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Re: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« Reply #4 on: February 24, 2024, 1759 UTC »
This is probably the first time I have tried to listen to an FM signal on HF since 1979-80 when there was 10m FM during the sunspot peak and I tried slope-detecting them with my FRG-7.  (Edit--sometimes it sounds pretty good, which makes me wonder if the apparent distortion is splatter from WMR or whatever is on 6295. Maybe NBFM isn't as narrow as it should be.)
« Last Edit: February 24, 2024, 1803 UTC by n2avh »
Big into SWDX late 70s through early 90s, then forgot about it and when I returned via SDRs it wasn't at all what I remembered, but I'll deal with it. Grumble, grumble. All SDRs acknowledged, nothing is from my own radio.

Offline Shortwave_Listener

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Re: UNID 6270.5 NBFM 1605 UTC 24 FEB 2024
« Reply #5 on: February 24, 2024, 1823 UTC »
If this is the same station as 6950, I don't think this is a ham TX. They usually have very clean and wide FM. This one has hum, is very narrow, and drifts in frequency (during silence you can still see the carrier move). Looks like a homebrew TX of some kind.
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