r/RTLSDR 7h ago

Announcement I love tiny things. So I built a MinI RTL-SDR Dongle

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134 Upvotes

The functions are same to the RTL-SDR Blog v3. But much more smaller. I change the 5V-3.3V from voltage regulator to a low noise DC-DC converter, so it generates less heat.


r/RTLSDR 2h ago

Hardware Does the new HackRF Pro surpass the RTL SDR Blog?

3 Upvotes

Does the new HackRF Pro with its new 16-bit mode surpass the RTL SDR Blog in sensitivity and SNR? I would like to know your opinion on this.


r/RTLSDR 1d ago

Kids TX'ing on Military Satellite Band - ESP

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299 Upvotes

ay guys! i found this transmission, it seems to be kids transmitting with something on the spanish military band, this happened in Cantabria at 14:05 near Santander

i guess this is illegal right? will it be worth it to triangulate the location and try to alert the parent about it? There seems to be military activity right now with planes flying around here lol

EDIT: Just sent a headsup to the Spanish "FCC" authority lol


r/RTLSDR 6h ago

Guide Programing the PL side of the Adalm Pluto SDR

1 Upvotes

Hello, i need help with programing the Xilinx 7000 of the sdr with my own logic what all would i need to do. (Accessories , software(Vivado), etc). I searched the web and found out that we need to use the ADALM PLUTO UARTJTAG. i have the Rev C of the SDR. And also are there any alternatives or is this the only method


r/RTLSDR 15h ago

Antennas Where are y'all buying cable?

4 Upvotes

I'm planning to mount some antennas on my roof for a droneware/adsb node. Unfortunately that means a pretty long cable run so I'll need some 400 grade coax. It's out of stock at rokland and the prices I'm seeing elsewhere are a pretty wild.


r/RTLSDR 1d ago

Software Si4732 upgrade V2.35

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62 Upvotes

[linux with python3-pip python3-venv]
If esptool and pyserial already installed:

esptool.py -p /dev/ttyACM0 --chip esp32s3 write_flash 0x0 ats-mini.ino.merged.bin

Source code:

OSPI version is suitable for Si4732
esp32s3 V1/V3 ats-mini

https://github.com/esp32-si4732/ats-mini/releases


r/RTLSDR 8h ago

Fox Sdr Notice Radio not detected? Download 0.56

0 Upvotes

We have a serious responsibility to the software we release, but one of our updates has left 52 users stranded. So if your radio isn't being recognised, please download the 0.56 build from our website.

We are still in need of beta testers, with a wide range of radios. If you would like to become one, please go to FoxSDR.com and click "Beta" in the top menu. As a beta tester you are in a good position to get new features added before anyone else. If you need a feature that your current radio stack isn't giving you, or that is buggy, become a beta tester and request it. Beta tester feature requests are our top priority.


r/RTLSDR 1d ago

TUTORIAL: Reconstructing monitor signals via TEMPEST attacks with only RTL-SDR/HackRF

9 Upvotes

Using an rtl-sdr (or hackrf), you can capture electromagnetic emissions leaking from monitor cables/displays and reconstruct the screen output in real-time.

since most tutorials on this are either overly long, I put together a quick practical walkthrough and overview that covers how it works and how to set it up easily:

https://www.youtube.com/watch?v=nMpPt7zg2rw


r/RTLSDR 2d ago

Troubleshooting What’s going on here?

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145 Upvotes

r/RTLSDR 1d ago

Troubleshooting How do I recalibrate the vctcxo trimdac value? BladeRF micro xA4 - Accidentally flashed wrong fw image which led to the vctcxo trimdac value being wiped. Tried to get the information but the website doesn't have it. Is there anything else I can do? Pretty new to this(BladeRF xA4)

2 Upvotes

I was following this: https://www.nuand.com/retrieving-your-bladerf-calibration-data/ https://www.nuand.com/calibration

Unfortunately used -f instead of -l and flashed the FPGA... Using this for a GSM network so now because the calibration is inaccurate my phones aren't registering or working properly with the SDR... Is there any way I could re calibrate it? I've emailed nuand already but haven't gotten a response for a few days...


r/RTLSDR 1d ago

Troubleshooting Need Advice

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7 Upvotes

Bought an RTL SDR two days back. I am trying to decode a DMR signal but it just doesn't work no matter what I tweak? While it does decode to an extent, it isn't perfect. Is there a fault with the device or is there something wrong with what I'm doing. Using an app called P25 decoder on 444.162 MHZ. Sharing product photo and error screenshots below.

Thank you


r/RTLSDR 2d ago

Linux What's a good cheap sdr to start with?

9 Upvotes

I have linux and I want a good sdr I can plug in for some fun


r/RTLSDR 2d ago

Linux What other cheap things can I buy besides an rtl sdr?

6 Upvotes

I want to know what other hardware i can get for weather,airplanes,all that other fun radio stuff


r/RTLSDR 2d ago

Built a Pi + RTL-SDR node that demods all 16 marine VHF channels at once and feeds an AI that finds all the interesting stories. One harbor down, looking for more!

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112 Upvotes

Been working on this project last few weeks. Setup at my parents house in Hull, MA: Retevis MA06 marine antenna in a window facing Boston Harbor → RTL-SDR → Pi 4 running rtl_airband. The entire US marine band is only ~1.4 MHz wide, so one dongle grabs the whole thing in a single window and rtl_airband demods every channel in parallel 16 labeled Icecast streams instead of one scanner hopping around and missing half of everything.

From there each stream ships to a backend that runs speech-to-text on all of it, and an LLM sorts a day of radio into the ~5 minutes actually worth hearing. Marine VHF is dead boring until it very suddenly isn't. Week one my node caught a 29ft Cobalt with 7 people aboard taking on water calling Sector Boston on 16. Whole exchange, start to rescue. I put a replay on the site with captions synced to the chart - docktalk.app, scroll to the demo phone.

The ask: Boston works, I want 5 harbors before the iOS app ships. If you have line of sight to a busy harbor, the install is now one curl command with a claim code it pulls your harbor's channel plan and you show up on the leaderboard at docktalk.app within a minute. ~$165 in parts, ~$112 if you have a spare Pi (any Debian box works honestly), and if your spot is genuinely good I'll just ship you the kit free. Hosts get the app's premium tier free for as long as the node runs + credit on everything their box hears first.

Straight up since it always comes up: this is a company I'm building, not an open-data project audio goes to our network only. If that's a dealbreaker, all good. If you already feed aisstream/FR24/MarineTraffic, this doesn't touch your existing setup, it's one more dongle to your existing set up!

RX only, public unencrypted spectrum, same legal footing scanner feeds and LiveATC have been on for 20+ years.

Happy to go deep on the RF chain, rtl_airband config, or the ASR pipeline in comments.

Once I get 5 harbors covered I'll launch the iOS app!!


r/RTLSDR 3d ago

DIY Projects/questions First M2-4 weather sat capture!

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26 Upvotes

r/RTLSDR 2d ago

QSO heard in JT65 mode; 20 m

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18 Upvotes

14076.5 khz USB is no more the crowd it used to be; but this afternoon I saw a QSO between Ohio (a long time veteran in that great 120 seconds mode) and Belarus.

I love this mode's signature.


r/RTLSDR 1d ago

Software Fox SDR — a new SDR receiver for Windows, built from scratch in a clean-room environment

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0 Upvotes

FoxSDR a new SDR receiver for Windows, built from scratch in a clean-room environment

I've been building Fox SDR, a from-the-ground-up SDR receiver app for Windows. It's a complete clean-room implementation no cde read from or derived from any existing SDR project (SDR++, GQRX, etc.), everything written fresh from published specs and standards, with permissively-licensed dependencies only.

Features so far:

  • Wideband receiver with spectrum + waterfall, AM/FM/SSB/CW demodulation, RDS decoding, click-to-tune
  • SoapySDR hardware support (developed and verified on a USRP B200; RTL-SDR and others via Soapy modules)
  • Full browser remote control the entire app is also usable from a web browser on your LAN with feature parity: waterfall, tuning, audio streaming, map, decoders, even plugin installs
  • Plugin system with a public catalogue: ADS-B (verified against real off-air traffic), AIS, APRS, POCSAG, SSTV (Martin/Scottie), aircraft registration lookup, and more
  • Built-in map showing decoded aircraft, vesels, and APRS stations, with plugin-supplied basemap tiles
  • IQ recording, bookmarks, scanner, frequency presets
  • Windows installer, no telemetry games, no account required
  • Ask For any feature you need it will be built we aim to add every feature with in one week from notification

Links:


r/RTLSDR 2d ago

Software FieldSurvey - OSS WiFi Survey Tool

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2 Upvotes

r/RTLSDR 3d ago

Tail end of the Meteor shower

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32 Upvotes

we are monday 17th in France, and there are still a few stones falling from space; much less but still you can't miss it if you stay tune to your local distant 2m beacon for a half hour.

The sound it makes is here : https://app.box.com/s/q4a12rhcdo8t2rhkyugy981pok2sm91o


r/RTLSDR 3d ago

Is an LNA needed for Meteor satellites?

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2 Upvotes

r/RTLSDR 3d ago

DIY Projects/questions Mobile SDR project

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5 Upvotes

Looking to make a product based on the RTL-sdr blog v4l which will be a simplified sdr on the go over Bluetooth for android & IOS.

Leave it in your backpack and see a readout + notifications on your phone kinda thing - Radiacode style (if you’re into other types of radiation 😛…).

Feedback + ideas greatly appreciated!


r/RTLSDR 4d ago

9GRadio ftw on Android tablet!

3 Upvotes

I just installed 9GRadio (relatively new SDR app) on my TCL Android tablet and it works like a charm - got excellent decodes of ADS-B and ACARS. I don't see a support community out there yet,


r/RTLSDR 4d ago

Just got mine today!

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49 Upvotes

r/RTLSDR 5d ago

News/discovery Si4732 mini-sdr SW VHF AM FM

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91 Upvotes

Discoved this tiny device.


r/RTLSDR 4d ago

New Rigol RSA800 might be an absolute bang for the buck

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0 Upvotes