Архив за 09.05.2019

RTL-SDR Discussion • Re: need help with SDRSharp TETRA plugin

Here are some versions from TSSDR

https://drive.google.com/open?id=1B6pUP ... 72VWN4336b

Almost all of them are from the forum: http://www.radioscanner.ru/forum/topic50051-39.html
Good luck

Statistics: Posted by Elmvader — Thu May 09, 2019 10:41 pm


While testing my vertical CB antenna, I stumbled upon this. Any ideas?

While testing my vertical CB antenna, I stumbled upon this. Any ideas? submitted by /u/derekcz
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Troubleshooting Help • Re: I can’t hear anything on MW and SW

How big an antenna?

I barely hear any signals at all below 30 MHz (in Q/Direct Sampling mode) with an indoor whip antenna.

But I do hear some signals if I connect the RTL-SDR up to a 20M long wire antenna in the back yard.

Statistics: Posted by hotpaw2 — Thu May 09, 2019 8:34 pm


Finally got inmarsat to work!

Finally got inmarsat to work! submitted by /u/Bobcalamarie
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Decoding meteor-m2 from GQRX IQ file

Greetings,

We've recorded ameteor pass with GQRX but have no idea how to make it work with our current software. I tried resampling it to 130k wav with sox, but lrptrx shows a square that rotates once in a while, so it doesn't generate any images. The original raw IQ file sampling rate is 2.4m so its not possible to use audacity for it.

This is all done under linux btw.

Thanks for help!

submitted by /u/EdvinasJ_LT
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Comment on Review: FlightAware 1090 MHz ADS-B Antenna and Filter by Rodney Yeo

Is FlightAware 1090Mhz Antenna electrically shorted at the center element to the outer element. I want to use RTL-SDR Triple LNA+ Filter with Bias-T and RTL-SDR version 3 dongle with it, will it work?

Что слышно в радиоэфире? Принимаем и декодируем наиболее интересные сигналы. Часть 2, УКВ…

Что слышно в радиоэфире? Принимаем и декодируем наиболее интересные сигналы. Часть 2, УКВ
Что слышно в радиоэфире? Принимаем и декодируем наиболее интересные сигналы. Часть 2, УКВ

Geostationary sat in europe

Are there any geostationary satellites to pick up in central europe (northern italy)? I've already recieved images from noaa 15/18/19 and meteor M2 but i'd like to try a geostationary satellite as a next step. I've Heard about meteosat but it shut off the image tx

submitted by /u/E440QF
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KerberosSDR • TCXO and high ambient temperatures

I know there have been discussions about heat before here, but I did not see anything that sufficiently answers my questions.

While not specifically mentioned in the info on the KerberosSDR, being based on the R820T2, I am assuming it has the same <1PPM TXCO chips to prevent frequency drift at different temperatures. These chips have limitations though and I have found them to be completely inadequate to deal with the temperatures encountered in the Arizona desert. Temperature drift quickly becomes a problem in even average mid-day heat and the dongles burn themselves out when ambient temperatures often pass 45c in the summer. I switched to a dongle from NooElec.com that has a more precise TXCO (<0.5PPM) and is a bit more tolerant of the heat. It still tends to drift without active cooling after a while when ambient temperatures really get up there, but it's flat aluminium case makes attaching a heat sink more effective.

So I have seen the discussions on the KerberosSDR that say "just blow some air through it and you should be fine", but am dubious that that would actually be effective at the ambient temperatures I deal with; given that the discrete RXs can't handle it. So I am curious if anyone has actually run a KerberosSDR in that type of environment and if so, what specific temperatures were encountered and what specifically they did to keep it from overheating. I am also curious if there is any "official specification" for what temperature range the device should be able to tolerate. I saw something that said "0-25c" somewhere, but if that is truly the case, I will need a lot more than a fan to keep the thing operational in Arizona!

Thanks-

Statistics: Posted by bobcat7677 — Thu May 09, 2019 3:02 pm


One of the stranger HF signals I’ve found…

One of the stranger HF signals I've found... submitted by /u/ErroneousShitstorm
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