Архив за 26.02.2020

Antenna for 137MHz weather satellite

Im looking for an pre-made antenna to pick up NOAA sats. I'd like a QFH antenna but I don't want to make my own. Im looking for somewhere i can buy a reasonably priced one.

submitted by /u/Avonixis
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And this is how it starts :D

And this is how it starts :D submitted by /u/crankylinuxuser
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Repeating signal:7 seconds for 5 blips then 9 seconds pause in 2 meter band

Repeating signal:7 seconds for 5 blips then 9 seconds pause in 2 meter band submitted by /u/Superkatzo
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New to SDR world…a few questions…

Hi I am new to the SDR world and I have a few questions:

1) I am using a Raspberry Pi 3 with an attached Nooelec SDR smart dongle. The pi is running GQSR(?) I believe and everything seems to be working, but I still need to learn more about how to use the software, but for now, I am able to get a “waterfall” display and can see signals on the air.

I assume that it would be better to only have one RF dongle connected to each pi, even though it is theoretically and physically possible to connect multiple dongles to one pi?

2) Has anyone found the need for installing an RF pre-amplifier on the input to the dongle to be able to see weaker signals? I am interested in isolating sources of RF interference and my initial impression is that with the dongle/software combination that I have is not very sensitive. I may very well be wrong but I am still on the steep part of the learning curve.

Thanks for the feedback...

submitted by /u/tentoes1962
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Duchifat 3 image of Tibet -received with an RTL

Duchifat 3 image of Tibet -received with an RTL submitted by /u/Yotam_kerman
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Comment on OpenAstroTracker: 3D Printed DSLR Tracking Mount may be useful for Antennas Too by Roy

Stick a circularly polarized antenna in there. My concern is that can this rotator handle non-equatorial movement? I’ve never used an equatorial mount so I’m not really sure how they work.

В чем это выражается? Не хочу видео писать. В общем, перестройка не работает. На FM странный сдвиг на 50 килогерц после …

Voevoda пишет:
В чем это выражается? Не хочу видео писать. В общем, перестройка не работает. На FM странный сдвиг на 50 килогерц после перехода на следующие 2 мегагерца, так же на FM записанные в диспетчере станции ...
читать полностью...
Широкополосный приёмник из DVB донгла - Страница #581

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Troubleshooting Help • Re: Fix for Windows 10 unrecognized RTL-SDR

Seems right but it doesn't work under Win10. Device manager nows shows this:

win10-sdr-4.jpeg


SDR# nor CubicSDR on Win10 can see the dongle.

Any fix or am I limited to OSX only?

Statistics: Posted by impaired-driver — Wed Feb 26, 2020 8:18 pm


KerberosSDR • Re: Tracking radiosondes

I would use a Yagi Antenna when you know what the main direction is.

Statistics: Posted by Username — Wed Feb 26, 2020 7:49 pm


RTL-SDR Discussion • Re: Can I use the SDR very close to the RF source?

My SDR Antenna is next to VHF, UHF, Ghz Antenna and have no problem.

Statistics: Posted by Username — Wed Feb 26, 2020 7:29 pm


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