RTL-SDR - an SDR receiver from a cheap DVB-T tuner on a USB connector

This is the first time I hear this type of modulation and it seems to me that it is something local because, for example, in the vicinity of Poznań, you do not hear anything like that.
Radar, alarm systems, monitoring ...?

The only disadvantage of this equipment is the remote control, because the glued button layout is this:

And the actual keyboard layout of the remote is this:

So the remote has to be programmed from scratch, but the button No. 8 will not work anyway.
If someone uses the tuner only for SDR, no problem

Such a converter "Precision HF Up Converter for RTL2832U E4000 R820T RTL SDR DVB-T tuner" is still a bit expensive, because $ 60 with shipping is not cheap ...
How is it connected? Tuner for usb-b cable, then to the converter and then to the computer?
What is the minimum frequency going to pick up with this set? 1.8MHz mentioned there or lower?

USB is only for powering this converter. It is connected via SMA connectors to the tuner. The 1.8MHz frequency is not its lowest operating threshold, but the 160m band that is received by the tuner at 101.8MHz (quartz in a 100MHz converter) and similarly for other bands, e.g. 80m - 3.5MHz, is converted to 103.5MHz.
What's the bottom line? This is a question for the author of the project.

I suspect that the lower limit depends on the lowest frequency at which the mixer operates.

Exactly, and it is not necessary to buy expensive converters right away. For example, I used the LA1186 chip from an old car radio + a few small elements. Zero cost but enough for starters.

It just so happens that I made a NOAA converter for an ordinary radio on LA1186, how to convert it now to receive below 24MHz?

Look for an upconverter on the chip, eg TA7358AP. Compare TA7358 to LA1186 applications. They are a bit different, but if you were doing a NOAA converter, you will definitely handle it. I will just add that the TA7358AP performs worse than the LA1186.

Did you mean this layout?
The author writes that LA1186N can be used instead of TA7358, but nothing says about any modifications, so what, I just put LA instead of TA and that's it?

The second thing is the antenna, you (zabex) use Discone also for the range below 25MHz?
Do you use a filter or just the FP6L 5-2400MHz amplifier, because I can see that you have a very clean signal, for example:

Yes that's the pattern. You can substitute LA1186N without any modifications. I have it a bit changed because I didn't like the original one (in the sense of his work). So far, I have only put the filter on the input of the system. Antenna - Filter - Gain - LA. The antenna is a makeshift Long Wire (about 20m of wire stretched behind the house). I use the Discone with the amplifier above the HF band.

I noticed that when using an upconverter on the LA1186 chip, the frequencies are raised by 31MHz, and with the R820T tuner, the lowest frequency on which it works is about 27MHz, so when you have a dongle with R820T and an upconverter on the LA1186, you can get frequencies up to 0hz, which in practice gives nothing but interesting I'm down to low frequencies such a duo is doing reasonably well. Maybe some online video?

I think that there is no point in going down lower than those 100kHz. Because it will be nonsense and abstraction ...

A VLF i ELF

VLF - Low frequency reception

I would try on 15.625kHz "The strength of this signal can provide information about the number of TV sets working in the vicinity (this is the frequency of deflection in the cathode ray tube)".

The last thing I hear in low frequencies is the PR1 at 226KHz.

Or maybe try with a long wave magnetic antenna? 171KHz should be receiving, and if not, it's really between 225 and 171KHz

I had done a loop before, but I connected it again because I did not check the received frequencies so low and unfortunately no effect. It turns out that the lower limit is around 200KHz.

lysy1980
Great advice. Some time ago, when I was trying to do it, I got fixated on the e4000 and the R820T somehow I was pushed out of my head. But I already have the R820T and I am having fun with time

I'm glad I use it myself sometimes.
I listen to the air band on the wave field of the open dipole and I can listen to it much better than on the box antenna.
Unfortunately NOAA linden. Neither in vertical nor horizontal polarization of the dipole.

I tried to listen to the SP DX RTTY Contest today but on the frequencies available to me either nobody works or the antennas are quite up to ... ;)

As for asd-b, I was playing with the dump1090 program
I use an ubunciak
I do not send to FL so it is one thing for me to decode. In fact, distance is the most effective for me at the moment because I am playing with the antennas.
I saw a mod for rasbery pi on the web that counted the distance to the plane because I did not find this mod anywhere, I had to breed it myself

If anyone is interested, you need to modify the interactiveShowData (void) function



my modification is

+ display

This is not done as it should, but it does provide basic functionality in interactiv mode by modifying only in one place easy for anyone to repeat.
The program requires our coordinates to be compiled in, but adding it as a command line parameter would complicate the life of someone who would like to quickly implement this mod.

The box antenna is bad
Fortunately, I had a few of these antennas and changed one by adding counterweights at the bottom.
So the base with the mustache counted on 1090 + the box antenna shortened a bit and we have a GP. But it's best to do this
http://sp7pki.iq24.pl/default.asp?grupa=3534&temat=157203
with counterweights.
Interestingly, the maximum range greater in the direction I have exposed is in the case of the whip itself, but the added counterweights improve the characteristics because it improves the "visibility" of the planes from the covered side.
I can already see that the weather has a big influence because yesterday evening the maximum distances were up to 230 km and today 170-180 km

In fact, I could give the antennas one floor higher, i.e. to the roof, but on the one hand, I will probably lose what I will lose on a longer antenna cable. And knocks, which is a little bit more, so to switch the antenna to the roof, it would be a little out of my way.

Such a chint fits a standard magnetic stand with a screw thread at the com / lpt / vga port. And so you can do interchangeable "whips"

To calculate the distance to a still plane and to add the range, for example, to the Planeplotter or Basestation program using the * .out file, the Sbsplotter program is used.

Hello gentlemen!

I also started playing with SDR based on a DVB-T to USB adapter. In my case, I have an EZCAP R820T with RTL2832U. So far everything is flickering well, I'm using SDR Sharp. However, I have a question about "up converter", specifically about this project: http://code.google.com/p/opendous/wiki/Upconverter Has anyone made / bought it ready and could write if it is worth bothering about it?

lysy1980
Well, only I prefer ubuntu on a daily basis and a dump after modification meets my expectations. What's more, it is more flexible from my point of view, because if it came to my mind to throw the toto together with some machine on the roof, it will be toto under Linux control anyway.

I use 2 receivers, one works on Debian Server without X on a disc with VIA EDEN C7 600Mhz (IGEL ThinClient), for decoding I use dump1090 (CPU load max 50% without aggressive option), the other works elsewhere under Windows XP Embedded, decoding using ADSB #, dene from both receivers to the TCP HUB and from here to VRS and FR24, the last ones work under Windows, among others because the mono platform needed to run VRS under Linux does not have to work.

I am proud of my results. I ordered such a contraption straight from China (About PLN 30)

This is some modified clone of the E4000 (Based on RTL2832U) and to be honest it works great. I listen to CB, uniformed services, FM radio, remote controls, etc. without any problems. It's well over 1Ghz. I recommend this dongle.

Software is SDRSharp for elevator and GQRX for linux.

@DjExit, what distribution did you install GQRX on? Have you had problems with the installation? On Mint Mate I can't deal with installing any software for this sdr, librtlsdr is still missing.

librtlsdr is not part of the distribution

Xubuntu in the latest version, after installing aptem, all if it already had on board.

RTL-SDR / HackRF Live DVD.
Maybe someone tested this distribution for the R820T?
PS Ubuntu.

I have on the list of TODO ubuntu-12.04.2-custom-sdr-amd64.iso is probably just that, I even sucked only from the paw which I had intended for this purpose, I could not put together again today and probably I will not get it tomorrow either and will wait until next weekend.

It's a pity because I mean the paw. The weather is good and I am looking for a Live CD not to interfere with the borrowed equipment and to sit at night with RTL and LNB
I read something else but I will try this distribution as well. Thanks for the help.

I do it a bit differently in the context of your problem, I just have a few disks and depending on the purpose of the hardware, I take the disk and put it in the environment I am interested in.
But the clapper which I use for various stupid things has failed and is waiting for a transplant; P

I am not so crazy about unix systems, so as a youngster I am looking for something easier that will allow me to run RTL outdoors