Архив за 08.09.2017

Comment on Outernet SDRx Clearance Sale $15: RTL-SDR with built in L-band LNA and Filter by unixpunk

There are 2 SMA ports on there, 1 bypasses the LNA+SAW and has a bias-t enabled and the other is just the LNA+SAW, no bias-t. Maybe the LNA_BYPASS port would work for your needs assuming you’re not using an antenna that is a dead-short. I don’t recall if you can disable the bias-t on the LNA_BYPASS port or not though if that were to be a complication for you. HTH

Comment on Outernet SDRx Clearance Sale $15: RTL-SDR with built in L-band LNA and Filter by AD5NL

Unixpunk, are there any mods for the Dreamcatcher? I was thinking it ought to be possible to remove the SAW filter if it is a discrete component (separate from the LNA).

Comment on Outernet SDRx Clearance Sale $15: RTL-SDR with built in L-band LNA and Filter by Max

So to have it at the excellent price of $15 it should be supplied free of charge 😀

Comment on 50 Units of a $199 Nuand bladeRF x40 for Sale: 1-Day Only by omar

thit the promotion still available?

LNA4all Bias tee mod

Can someone spoon feed me links to a 10uH SMD coil and 0 ohm SMD bridge for the LNA4all bias tee mod? I guarantee if I make the selection it will be the wrong size. US shops preferably please and thank you.

submitted by /u/notsomebody1
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Comment on Outernet SDRx Clearance Sale $15: RTL-SDR with built in L-band LNA and Filter by unixpunk

The SDRx can be modified to be a full/normal RTL-SDR by adding another SMA connector, bridging a solder-jumper and removing one other SMD component. In one test case it worked better (ADS-B tested) than a regular RTL-SDR. http://forums.outernet.is/t/sdrx-to-rtl-sdr/3927 has a link to the instructions and some test results.

rtl_fm’s output with sox is outputting just noise on wxtoimg

I'm currently using rtl-sdr + GQRX on debian on virtualbox(on osx) without issues. Yesterday I decided to use a real machine. I installed rtlsdr package. I ran rtl_fm on an fm station as well as 162.5(noaa radio) and was really shocked that audio is even cleaner. I mean it's real clean.

 

I used this command for NOAA radio

rtl_fm -M fm -f 162.5M -s 55k -l 0 -g 50 -E wav -F 0

 

and for an fm station, I used this

rtl_fm -l 0 -g 50 -M wfm -f 105.5M -s 170k -r 32000 -E deemp

 

This morning NOAA 15 APT elevation was 71degrees which is pretty good. The command I used for it was

rtl_fm -M fm -f 137.62M -s 55k -l 0 -g 50 -E wav -F 0

 

But earlier, I used the command below for NOAA 18

rtl_fm -f 137.9125M -s 55k -l 0 -g 50 -F 0

 

I processed it with sox like this

sox -t wav NOAA15fm.wav NOAA15.wav rate 11025

 

There was an error output like this too

sox FAIL formats: can't open input file `NOAA15fm.wav': WAVE: RIFF header not found

 

What's wrong with my commands? I used the params used by other people who claims it worked for them. I also remember trying last night using -t raw something, I also got WAVE: RIFF header not found.

 

I usually use ffmpeg to convert my wav to 11025 on my vm and it works great with wxtoimg. This time, the output it generated was

NOAA15fm.wav: Invalid data found when processing input

submitted by /u/Oxffff0000
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Is this some kind of overload, like overload from FM stations or is it some other noise?

Is this some kind of overload, like overload from FM stations or is it some other noise? submitted by /u/dev_arved
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Помер смертью храбрых мой хак рф,решено было не гнать коней а купить синий…

Помер смертью храбрых мой хак рф,решено было не гнать коней а купить синий донгл. Тем паче апконвертор уже был. Что хочу сказать. Пашут одинаково, донгл где то даже выигрывает, но у свистка дико плывет частота. Это у синего. Брал два, чёрный и синий сравнить. Так вот чёрный пашет почти так же но при этом не греется. Вообще. Подключил их к автомобильной врезной си Би антенне. Дальнобоев ловят одинаково. Авиа ловят тоже отлично. Конвертор ещё не подрубал, разъёмов нет пока. Так что кто стеснен деньгами берите си Би антенну, стоит моя например 1400. Всем спасибо)

Наконец то возобновил работоспособность, пришлось снести на* эту убогую и…



Наконец то возобновил работоспособность, пришлось снести на* эту убогую и глючную 10ку, поковыряться в биосе и поставить 7ку, но к сожалению тоже пришлось снести, тк на ней тачпад не работает, слава богу встала 8.1, правда синезуб не пошел, а остальное нормально заработало.
Первый снимок на обновленной системе с Метеора на автомате с привязкой
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