RTL-SDR - that is listening to the frequency by the computer thanks to the TV tu

hmm. I fell for it. I bought the same equipment, installed it and found it to be deaf as a post. It only receives stronger signals, e.g. aviation. It can only be treated as a curiosity.
The receiver is operational because it receives DVB-T and strong signals. Aviation in my case.

From what I remember, without modifications, this receiver works from 60MHz to a little over 2000MHz.

M. S. wrote:

hmm. I fell for it. I bought the same equipment, installed it and found it to be deaf as a post. It only receives stronger signals, e.g. aviation. It can only be treated as a curiosity.
The receiver is operational because it receives DVB-T and strong signals. Aviation in my case.

What antenna(s) did you use? You didn't tell him he was deaf by plugging in a piece of wire, did you?

It works without problems with the antenna connected to the given band. Frequencies below 60MHz can be listened to by adding a transverter + appropriate antenna, e.g. delta for the 80 m band or LW with an antenna box

Quote:

What antenna(s) did you use? You didn't tell him he was deaf by plugging in a piece of wire, did you?

J-ka for the 2m band. with an antenna amplifier. On this antenna, I listen to planes, the 2m band, up to the glue frequencies on the receiver of my own design. I can hear one of the repeaters from about 130km on 75% of the signal. Airplanes take my antenna off. I also receive TV on this antenna. I guess my expectations are too high. I also had a scanner on the TV head and compared to receivers for specific bands it was weak.

Is it worth buying such an invention for listening?
Is it better to buy some baofeng for example?

I bought a different tuner than the Not Only listed here. It has DVB-T+DAB+FM written on the housing. The cost of PLN 10 is more expensive than Not Only, but I am able to receive from about 25MHz. I tested it on the CB band and I find that it works and receives this band correctly.

I confirm, it covers the CB band without any problems - of course with a stationary external antenna. Besides, it works very well in FM.
I just don't know why the frequencies diverge after some time of listening.
Maybe it's a software fault??

Is there any other firmware for this card?

I recommend it for fun and testing.

Piotrom0

Hello, could a colleague show a photo of this tuner? Because I would also like to buy it, but there is a lot of it, and here is something already proven

I confirm the correct operation of this tuner. I have NOT ONLY for about a year. Bought at the V..IS store. It picks up VHF very well. Other frequencies can also be heard. I am using SDRSharp. Below is a photo. The current price is about PLN 50.

Quote:

I just don't know why the frequencies diverge after some time of listening.
Maybe it's a software fault??

At the beginning I struggled with the problem of the complete non-overlapping of the set frequencies with the actual ones. I tried to compensate in the "Configure" tab but could never set it. After some time, I realized that I had Swap I&Q enabled. I don't miss the frequency while listening for several hours. One thing that annoys me is quite strong heating of the tuner.

I listen to it myself for now on a piece of wire but I connected it to antennas for amateur bands and really day to night. Amateur communications and beacons could be heard without any problems.

An additional disadvantage that bothers me is the characteristics of the tuner. Where I would not listen (CB, 2m, 70cm) some FM station is still broadcasting in the background. The tuner seems to have increased sensitivity to the 88-108MHz range. Anyone have any simple filter ideas for this range?

PS Model I use:
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I am just waiting for the tuner from the above photo, I ordered it on ebay from China for the equivalent of PLN 35, it is based on the RTL2832u chipset and the R820t tuner, apparently the older versions are on a different tuner. The tuner on the R820T probably works in the 24-1700MHz range, and has greater sensitivity than, for example, the E4000. Here is a video comparing the same-looking dongles with two different tuners.

[youtube]http://www.youtube.com/watch?v=SVrdgdN1HF0 [/youtube] .

Buddy zweinstein, maybe you live near the transmitter of an FM station and this causes the phenomenon you describe?

Yes, there are transmitters on each side nearby. Even without an antenna, I receive most stations. This is what it looks like in the city. In the countryside I have an omnidirectional and broadband Discone antenna and it also collects all CCIR stations for me. I have two options - selective antenna or this filter. With a scanner like this SWR, the filter is better. He has only been acquainted with the topics of the radio station for a few weeks. So far I haven't had the opportunity and the finances to get a listening receiver. These tuners are a breakthrough for me.

Thanks a lot nikoloz.glonti to the author of this topic, because it was his film that prompted me to get acquainted with this interesting topic

I also always wanted to have such a scanner, but I never even dreamed that I could have one for little money, in general, the SDR technology itself is something amazing for me because radio technology has always been associated with LC circuits, tuning and other nasty stuff for amateur without the appropriate equipment, and here you are, one IC, there are almost no input circuits, and such possibilities, see also https://www.elektroda.pl/rtvforum/topic2353101,.html someone already raised the topic a year ago. By using the converter, e.g. on the LA1185, you can extend the range with long, medium and short waves. Best regards and good listening.

Hello
I have a problem. I bought this tuner and it turned out that as soon as I want to turn on playback in the SDR program, a window with the error "Cannot access RTL device" appears. I tried to change the parameters but it did not work. Maybe someone knows a solution to this problem? I will only add that the TV works without a problem.

Tomek L wrote:

Hello
I have a problem. I bought this tuner and it turned out that as soon as I want to turn on playback in the SDR program, a window with the error "Cannot access RTL device" appears. I tried to change the parameters but it did not work. Maybe someone knows a solution to this problem? I will only add that the TV works without a problem.

You probably need to uninstall the manufacturer's drivers and install the SDR recommended for listening. As far as I know, you have a choice, either you use the original drivers and watch TV or you install special ZADIG drivers and use the dongle as a scanner, here is a description of how to do it, unfortunately/unfortunately in English http://rtlsdr.org/softwarewindows . I won't give my head that this is the right method, but that's what they recommend on the forums. Regards.

When I played with the drivers (I restored the original drivers to see how the TV works) I also had this problem after restoring the ZADIG drivers. I have reinstalled these drivers several times. I think it worked in 3 as I first removed everything, restart, uploaded the original drivers, restart, ZADIG, restart, it works But the first time it started without any reboot. Probably the system has moods.

Thanks. Everything's running now. I installed the ZADIG drivers and it started right away. Regards

Is it possible to listen to something on UHF / VHF on this contraption??

NBA79 wrote:

Is it possible to listen to something on UHF / VHF on this contraption??

Yes, yes. It all depends on the antenna. You can even connect a broadband TV to start with.

The minimum that can be reached is 25MHz. After connecting the parabolic antenna, it was even possible to listen to the beacons around 1.3GHz, so the range is very wide.

I have already tried with a TV antenna with an amplifier. I had more interference than a useful signal. The disconnected antenna with the amplifier on was so strong that it even interfered with my reception from another antenna. This is the case with Chinese DVB-T room antennas - not worth it. It is better to connect the antenna itself without any additional amplifier.

I would also touch on that aspect. What is the input impedance of this tuner? From what the manufacturer states on the website, it is 75 Ohm. The MCX socket used there is 50 Ohm. How is it finally?

gregor_1980 wrote:

NBA79 wrote:

Is it possible to listen to something on UHF / VHF on this contraption??

Yes, yes. It all depends on the antenna. You can even connect a broadband TV to start with.

So a half-wave dipole and it should also flash?

On an open dipole (75 ohm) with an amplifier from a broadband antenna, I received ADS-B 1090MHz!!! signals, the antenna was outside right outside the window, I received signals from planes within a radius of about 80km. I also managed to receive a signal from the NOAA satellite on 137MHz, the signal was weak but I managed to decode a bit. Dipoles can be made of two telescopic antennas, and their length can be adjusted to the band of your choice. For the beginning of the fun, I recommend a broadband TV antenna with an amplifier, the higher the antenna, the better.

gregor_1980 wrote:

On an open dipole (75 ohm) with an amplifier from a broadband antenna, I received ADS-B 1090MHz!!! signals, the antenna was outside right outside the window, I received signals from planes within a radius of about 80km. I also managed to receive a signal from the NOAA satellite on 137MHz, the signal was weak but I managed to decode a bit. Dipoles can be made of two telescopic antennas, and their length can be adjusted to the band of your choice. For the beginning of the fun, I recommend a broadband TV antenna with an amplifier, the higher the antenna, the better.

Hello. I already tested my dipole. It sleeps nice. I hear planes approaching Okęcie and Balice...

(My physics teacher in primary school) said that I fit in the frequency I am asking about, here I found some information https://www.elektroda.pl/rtvforum/topic1975577.html
But I have a problem with the structure.
I want to use it to operate servos via wi-fi.
http://www.dipol.com.pl/pdf/anteny_wlan.pdf
How to extend the DAB+ band by 100mhz?
174.9-239.2Mhz

Hello, I have something such , I tried to select something from the list in the SDR program but I can only select other sound car and softrock, and something doesn't work for me, what am I doing wrong? The device has drivers installed and appears as sound and game controllers, while it is called AF9035 BDA device drivers downloaded from the manufacturer's website.

Unfortunately, this URZ00185 tuner does not work as an SDR receiver, because it has an Afatech AF9035 processor, and not the required RTL2832. A similar tuner with the AF9035 is AverTV/Avermedia (A835).
For the DV-T nat USB tuner to work as SDR, it must have RTL2832 and preferably R820T (range from approx. 24 MHz to 1970 MHz). A lot has been written about this on the electrode, so I won't repeat myself. Lots of info on this topic and here:
https://www.elektroda.pl/rtvforum/topic2353101-0.html
https://www.elektroda.pl/rtvforum/topic2463965.html

thanks for the info