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

The optimal price I can pay for an SDR receiver is a maximum of $ 100-120.

Second question, is it worth paying more than $ 20 to the tuner above
http://s.aliexpress.com/BFBNRvEz
is it better to buy such a cheaper http://s.aliexpress.com/quUZNFfa

I mean is there any difference between them or is it the same tuner only in different housings.

neo386 wrote:

Hello

I wanted to ask what core these transformers should be wound on? I have a T37-2 (red)

I see. For the latter, I have all the parts. How to expand it to All right walked on short waves.

I feel referenced to the array because I am the author of the converter from the second schematic. You don't have to do anything to work on KF. That's what it was created for. The use of the NE612 in a symmetrical arrangement gives a good "kick". I compared symmetrical and non-symmetrical systems. In a non-symmetrical arrangement, no antenna amplifier will give such an effect. In fact, the amplifier will raise the signal, but also the noise will increase. I just used the cores I had at hand. Others can be used. The point is that they should work in the appropriate frequency range. Both transformers will generally match the I / O to 50 ohms. In a symmetrical arrangement, the NE input has 3K?. I tried to match it with the same 3k? to 50? filters but after connecting to the apparatus, "circuses" came out. Better to wind up transformers . It has a nice flat response. Of course, there are better cores than the ones I used. There is a lot to show off in this area.

Hello

Here are my upconverter building effects. Somewhere my 50MHz generator is missing, so I used 32MHz.

https://www.youtube.com/watch?v=DkwXQq4Q8vk&feature=youtu.be

Some AM station.

What frequency do you have to tune to receive 14MHz with a 32MHz generator?

Equation 14 + 32 = ??

https://www.youtube.com/watch?v=nragrRdb-c4&feature=youtu.be $ 14MHz video. Hear CW and PSK. SSB can also be received without any problems! :D

Antenna: G5RV.

Adrian, SQ8NZD

Adrian,
something thinly perceives it as for the antenna you have. To my eye the fault of the settings.
For convenience, enter the frequency of the generator connected to the converter in the SDR SHARP window. If it is 32MHz, enter -32000000 in "SHIFT". In the configuration window, you have a gain slider. When working under the NE612 converter, the gain is not more than 10 (GAIN), preferably 5-7. Adjust the slider on the right for the contrast on the waterfall.
You have a nasty signal-to-noise ratio.
At least it should look like it used to be for me (it's much better now).



best regards
SP5MET
Tomek

I am more of a Linux fan, so I use and recommend Gqrx. And I also have Windows and comparing ... there is no difference. SharpSDR has more goodies and useful extensions that's a fact.

And this noise / signal ratio is only the fault of the settings.

Hello
What can I listen to on such an antenna http://monitorsklep.pl/sowar-antena-dexta-euro-zewnetrzna-o_l_58258.html? My location is north-east of Warsaw (about 20 km), I live on the fourth floor. The antenna is aimed at the capitals, of course.

And I'll ask you out of curiosity, did you use a down-converter to catch 2.4GHz? How would such a thing work for measuring garbage at this frequency? What do WiFi networks look like?

tepek wrote:

Hello
What can I listen to on such an antenna http://monitorsklep.pl/sowar-antena-dexta-euro-zewnetrzna-o_l_58258.html? My location is north-east of Warsaw (about 20 km), I live on the fourth floor. The antenna is aimed at the capitals, of course.

It's a DVB-T antenna. You can receive digital TV on it. Wsio!

Thanks for the answer, but you are wrong On this antenna you can listen to FM radio in and around 168 and the airport. And I'm asking myself not to waste time on frequencies that I won't hear anyway.

Added after 1 [hours] 3 [minutes]:

Ehh Fast Scanner Plugin doesn't work for me, hence http://www.rtl-sdr.com/sdrsharp-plugins/. I also checked the sdrsharp version linked on page 21 of this topic, but it also doesn't work.

More specifically. You can receive frequencies 174-230MHz on this antenna ......... 470-862MHz

http://www.sp7pki.qrz.pl/bandplan_UKF.pdf $ Here you have a bandplan of amateur bands. With 2m it may be a problem, but 70cm it is.

Why on the radioscanner.pl forum you have to wait so long for the account to be activated. I started it a few days ago and it is inactive all the time: / And could someone help me with this frequency scanner? Nobody really uses it (two posts back)?

Give up on that forum. You have an electrode! . What do you want to hear on this RTL-SDR . We will help in case of need.

Added after 4 [minutes]:

tomek10861 wrote:

And I'll ask you out of curiosity, did you use a down-converter to catch 2.4GHz? How would such a thing work for measuring garbage at this frequency? What do WiFi networks look like?

Ooooo! Buddy ...... Do you have experience with microwave circuits? This is a difficult topic.

http://www.rtl-sdr.com/tag/downconverter/

The only thing I can recommend you is HackRF 0.1 MHz - 6 GHz

If you live in a block of flats with cable TV, it is possible.

I suspect it was a blend product and the actual frequency at which it went was elsewhere. How much did you have the gain set to?

As for the source, due to the fact that TV is now digital, I suspect that someone from the neighbors has some wireless headphones, speakers or other device that re-transmits the sound. I have a lot of such audio from TV around 860MHz and in my cable TV there is no analog for a long time.

When this signal appears again, look for it on other ranges.
Maybe it will be found with much greater intensity :)

Or someone has a wiretap

I have not met this yet, but according to the list it fits: http://www.dipol.com.pl/wykaz_czestotliwosci_kanalow_tv_bib02.htm
The most popular copy is probably at 173.7500 :)

Not all cable networks gave up the analog. My uncle's house has both. People with two or three TVs were pissed that so many set-top boxes, cards and additional fees were needed that the company left a slimmed-down offer without fees with the possibility of dividing as many rooms as you want.

It's just that the net is tight with him.

From the frequency and method of communication, it looks like a fire brigade

It looks like a cable cable to me - in my block it is on an analogue However, the network is tight - unless I plugged a piece of wire into the wall socket as a transmitting antenna

KamilOc,
if you want to check if your cable is the source of the signal, the easiest way is to plug into the antenna socket and check what's going there and where :)

And the buff in SDR SHARP is one of the most important settings and is here:

angro wrote:

From the frequency and method of communication, it looks like a fire brigade

Box.

Codename W is Crisis Management.

The fire brigade has an F, so it would be TF if anything, but they rather say, eg Ostrowiec 998

How the sound card allows it, why not. Eg has 2 audio outputs for front and rear speakers, or use SPDIF.
If you do not have such a card or equipment with SPDIF input, you can buy an Alledrogo USB card - there are a few zlotys + shipping and send audio from the receiving program to it, and default music to the card.

@KamilOc I do not know if it is compatible with all phones, i.e. if the phone will be charged in usb host mode, but there is something like this
google phrase:
OTG CABLE ADAPTER Micro USB + Y-cable power

Hello, can anyone help me with the bandwidth setting on the RTL2832U tuner with the R820T chipset. I would like to receive unencrypted DSD + mototrbo or GPS location. Can anybody help me?

For the identification on the map to work, LRRP must be configured in the radio. In my experience, nobody in Poland (maybe I don't know something?) Uses it. There are samples on Radioreference, incl. from the Czech Republic or Slovakia, where positioning works. DSD does not decode locations from Hytera.

Has anyone tested in the Lublin voivodeship? I also have a question, does the ambulance talk a lot on the radio or does everything go through the terminals?