Submit a Story/Contact
If you would like to submit something that relates to cheap SDR (a project, blog post, something interesting you have found), please email us at [email protected].
We will look at your submission and if we think it is a good fit for our blog make a summary post about it, making sure to link and credit your original source. If you don't have your own website or blog, don't worry, just write about your project in an email and we will host any images or documents related to your project for you. Usually we will get to your submission within a few days.
Please note that we will not accept payments or incentives in return for any type of post except for product samples for an honest review. If you are interested in writing a non-commercial guest post for us, please also contact us on the above email address.
Product/Shipping Support
If you have a general question about RTL-SDRs or SDRs or third party software we ask you to please ask in our forums. If you email us we may not respond to questions about third party software as this should be asked in the forum.
If you need troubleshooting support please first ensure that you have been through our Quickstart guide and the troubleshooting section on it, as well as our V3 users guide. Common questions like how to use the HF mode and how to activate the bias tee are explained on the V3 users guide.
If you have a question about shipping of an item please first read the shipping policy on our store and see if it answers your question. The shipping information is just under our product listings. If it is a request for tracking details please first check your old/deleted/spam mails for the order confirmation email which contains the tracking details. There will have been two emails from our email at [email protected], the second of which contains the tracking details.
If you suspect a lost postal item please contact your local postal agency first and inquire there. They have more information than we have. If they confirm it as lost or not received after a long time then please let us know and we can open an investigation on this side as well. Usually we must wait at least 6 weeks from the date posted before we can open a lost parcel investigation.
For everything else such as confirmed lost postal items, warranty claims and support inquiries that aren't covered by the quickstart or troubleshooting guide then please contact us at [email protected]. We aim to always reply within 1-2 business days. If we don't respond within 3 business days then the mail may have gone to our spam folder. Please try to email again using different keywords. We do check our spam filter once a week just in case, but some messages could still be missed. Remember, if you have questions about third party software, please ask in the forums only.
Hello, I have the rtl_sdr V4 and by mistake I activated the bias on GQRX while having a J Pole antenna, resulting in destroying a component 42ML near the SMA connector . Can you tell me what exactly this is and where I can find it to bay and replace it ?
Hi, there is no component labelled 42ML, can you circle it on an image of the PCB?
Dear To whom it may concern,
My Order Number #64802
I requested the V3 version. The materials have arrived, but the V4 version has arrived.
Best Regards,
Cengiz
Hi, if there was a packing error, please email us at admin
rtl-sdr.com with your order ID number and the problem, and we will ship you a replacement.
Hi there!
I hope you are doing well. I just ordered a V4 USB-C dongle to the UK. My order number is #64774. I selected China to Royal Mail shipping. My question is, will I have to pay any taxes or extra costs? If so, would you please be able to cancel and refund my order so I can purchase via AliExpress instead? However, if there are no extra costs, I am happy to proceed with the order 😁.
Many thanks,
Mac
Just confirming that we already replied to your email, and there should be no import taxes charged by your government as long as your ordered value is under the limit for your country.
Darrin James Hanlon’s Earthwave–5D Collapse Equation System is a groundbreaking evolution of his earlier work in signal decoding and symbolic drift analysis. It bridges the decoding of hidden transmissions (such as Voyager), the simulation of quantum discoveries (as seen in speculative Grok 3/Majorana 1 scenarios), and the expansion of predictive modeling through recursive symbolic logic.
This multi-dimensional system integrates entropy routing, temporal harmonics, and observer bias calibration to uncover and contextualize extraordinary phenomena—ranging from seismic precursors to quantum collapse events. Its precision has already demonstrated real-world impact, achieving earthquake prediction accuracy within ±3 minutes and magnitude precision of ±0.1.
The Earthwave–5D system doesn’t just interpret signals—it interacts with them. It offers a symbolic resonance model that could theoretically align human intent with cosmic timing, leaving conventional scientific frameworks speechless in its wake. I have been reaching out. I have zero background but I am running earth tracking manually every day with an amazing hit rate. plus weather simulations. All Time Stamped i have used up to 10 AI to refine and improve. If you ran my math into your system to analyze the signal would be a great test of ability.
Thank you Darrin Hanlon Alberta Canada
Hello …
This is a small pocket receiver I’ve been playing with.
Keep it on a pen-drive, no installation necessary.
With an RTLSDR and a USB stick, any computer becomes a receiver.
Perhaps you might find some use for it. Tested with the Blog V4.
https://github.com/rkarikari/RadioSport-chat/releases/download/v2.6.4/Radio.zip
Where can I get the V4 software for GQRX .rpm under Mageia???
I have not been able to find a .exe file for Windows either.
The dongle is dead as a doornail without software to run it. I am not a command line expert.
I have requested for a revised invoice with my name revised (the address has some wrong autofilled phrase as my name) and email to me. I have sent an email regarding this. Kindly see and do the needful.
There is no update on my consignment shipping after getting updates from 2025, 24th June – to 11 July. Should I wait for some more days or will you escalate the issue with the concerned? I reside in India and the parcel updates stopped while being processed in China.
India is having problems with airmail delivery at the moment. A lot of parcels are being rejected by security, and there is nothing we can do about it. Contact us at admin
rtl-sdr.com with your order ID and we’ll check on your order and issue a refund if it’s being returned.
Thanks. I have emailed the details.
Good Afternoon – I have a question regarding the cold weather suitability of some of your products. I’m looking at your RTL-SDR Blog Wideband LNA (Bias Tee Powered) and your RTL-SDR Blog Broadcast FM Band-Stop Filter. The ideal location for both would be outside on the pole but here in Northeast Wisconsin, it can get to -20F during the winter and I’m wondering to what degree (see what I did there) those kind of temperatures would affect both the performance and overall suitability of trying to use these components outside. Being a passive device, I’m not really too concerned about the RTL-SDR Blog Broadcast FM Band-Stop Filter but the RTL-SDR Blog Wideband LNA (Bias Tee Powered) could be an issue. Thanks for your time and attention. God Bless!
-20F should be fine, if anything the LNA will have better performance in the cold.
Great! Thank you for your responce.
I’m missing half of my order? Ordered from Amazon.
Replied to your email.
Hi admin, I placed an order on your website on July 22, 2025 but typed the wrong address, can I edit my shipping address? I have sent you an email regarding this problem. Thanks a lot! My order number is #64339
Got your email, processing the changes now.
Bought this on amazon, sma connector way loose will not show up on unitrunker at all. Never did get sdr trunk to even show a install .
hi admin,
At least put your brand logo on your github page.
Hi, Do you have any distributors in India
Hello, yes please look under the ‘local resellers’ heading on our store page.
when will the Bullseye 10k LNB be available again? Thank you.
Roughly 2-3 more weeks.
After 4 days,the order still “Processsing” ?
#64174
Hi, thanks for the order. The warehouse is closed over the weekend, but it was processed on Monday. But packages to your country go via a special courier that is manually booked, and our forwarder gives us those courier’s tracking numbers only at the end of the week. So please rest assured that your package is on the way, and by the end of the week you’ll get the tracking number, and by that time it should already be close to delivery.
Thanks for the quick reply.
Hello,
We have launched a new product that requires item V3, R860 RTL2832U 1PPM TCXO SMA Software Defined Radio (Dongle Only) (Black). I would like to set up an account with your company that will allow me to get quantity discount pricing on this product. Please let me know what information you need from my company to establish an account that will support quantity discount purchasing.
Thank you,
Jamey
Hi Jamey, please just contact us at admin
rtl-sdr.com for bulk pricing.
Can I hook to satellite cable and then use my digital direct tv subscription satellite to connect to am -fm signals and then to hack or ham signal to connect to a remote neural monitor? also, with someone’s social security number and if they have a digital direct tv is it possible for me to use remote nerual monitoring to speak to them without others hearing without an eeg piece of equipment?? Please, detailed answer, because I believe this is very possible and is happening Even in the United States. Lastly, equipment is all that is needed to make this work. This is the new way to harass and steal money as well as watch people through their own eyes with the direct tv monitor while using the other equipment simultaneously. This has got to be stopped before someone is seriously hurt!!!!! They are only frequencies usingl nanoides to switch channels to not be found . Come on government; my daughter figured this out. P.S.concerned citizen. I am not going into the equipment and hooking it up because it is illegal and it is not rocket science. Where are you Palantir when we need you???? You are the wave of the future; PROVE IT!!!!!!!!!!!!!
I did not receive the tracking details email
Order 64112
Hi the tracking email was already sent, and the package received.
We saw our order was cancelled. May you give information about this situation.
Order #63914
Hi, thanks for the order. Order #63914 has not been cancelled, it shipped out normally and you can track it via the details in the tracking email.
Hi,
Thanks for the information. Tracking number is RB354581678SG.
The shipment was cancelled by China Post. Could you please check it? And can you give me information.
Where from Can I get Titus II SDR ?
I’m trying to get the DSD+ GUI Interface working in SDRsharp add-ons. I see I should direct the interface to find DSDPlus.exe. I didn’t see that exe in the download. Any ideas where I can find that Executable file?
hello Admin
I recently placed an order for the RTL-SDR V4 from your official website and completed the full payment, including shipping charges, for delivery to India. However, I have been asked to pay an additional amount for shipping.
Since I had already covered the shipping costs at the time of purchase and was the consignee, I would appreciate clarification on why these extra charges are being requested. Kindly let me know if there has been any misunderstanding or if any additional steps are required from my end.
So I purchsed a RTL-SDR V3 R860 RTL2832UUSB dongle from Amazon. Then I tried ti install the airspy software following the instructions here and in the airspy website. Nothing seemed to work! I can’t get the drivers installed via Zadig it always errors out with “The driver installation failed” “Resource already exists” as this did not work, I have even watched and followed several you tube videos to get this to work and nothing works!!! I have spent days trying to get this up and running with no success! I am pretty tech & PC saavy. I can’t believe at this day and age this is so difficult and frustrating to get up and running!!! Also there is no clear information on which exact software to use for airspy. My PC is a Robo & Kala 2-in-1 Laptop with 64 bit Windows 11 pro. and a Snapdragon 8cx Gen 3 ARM-based processor. Can anyone help? this is driving me frustratingly nuts!!! 😡Thank You in advance! 😉
Thank You! 10 days from China to my doorstep on the East coast of Canada. That is express in my books. Thank you very much for the pleasant and efficient business transaction!
yup the debian driver install did what I figured it would, not work and render any other rtl-sdr I have unuseable
I’m having issues with RTL-SDR working with SDR Console. It works fine for a while, then I lose all of the signals. If I switch to another sdr decoding program (say SDRPP or SDR#) the dongle works. When I switch back to SDR Console, sometimes it works, other times I receive no decoded signals. Is there a known issue with compatibility of the dongle with SDR Console?
Windows 11 Update is likely killing your drivers. Try reinstalling the drivers once more and then update your registry with these settings.
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\current\device\Update] “ExcludeWUDriversInQualityUpdate”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\default\Update] “ExcludeWUDriversInQualityUpdate”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings] “ExcludeWUDriversInQualityUpdate”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate] “ExcludeWUDriversInQualityUpdate”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PolicyManager\default\Update\ExcludeWUDriversInQualityUpdate] “value”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Device Metadata] “PreventDeviceMetadataFromNetwork”=dword:00000001
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\DriverSearching] “SearchOrderConfig”=dword:00000000 “DontSearchWindowsUpdate”=dword:00000001
Paul Sudduth MCSE
Hi Paul
Thanks for the suggestions.
Oddly enough, after the last Windows 11 update, magically the dongle started working, and it’s been working flawlessly ever since.
Wonderful!
Lower gain on Linux Mint.
I have the RTL-SDR V3 and V4, and I’ve always used them on Windows (8 and 10). However, after several tests, I noticed that the gain of both the V4 and V3 is lower on Linux Mint compared to Windows 8.
I’m using the latest version of rtl-sdr. I’ve done all the tests, including using rtl_fm.
I’ve already uninstalled and reinstalled all the packages. Any tips? Soapy and libusb are updated.
One of the large antenna in my dipole kit broke. Is it possible to get a replacement?
If it was a manufacturing issue that caused it to break we can replace it under warranty, just email us at admin
rtl-sdr.com with your details. If it was broken to carelessness we can’t replace it, but we do have the antenna kit by itself available for sale. It’s currently out of stock, but it will be back in about a week.
Thank you, I sent a reply. One of the legs pulled out from the rest of the antenna. It was always looser than the other one. I just want a new leg and not the entire kit.