RadioInstigator: Building a SIGINT

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In summary, the conversation revolved around building a RadioInstigator for a raspberry project based on the PiTxSDR project. The author listed all the parts and materials needed, along with their prices, for building the tablet. There were also optional parts that could be included for additional functionality. The conversation also mentioned the ambiguity of some parts and the confusion on the required characteristics for the antennas. The schematic diagram and the wires and connectors used for the dongles were also discussed. The conversation ended with the speaker apologizing for the length of their post but hoping that they covered all the necessary information for anyone else interested in the project.
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Is this schematics accurate so far? What type of connectors and antennas should I use for this to work?
Summary: Is this schematics accurate so far? What type of connectors and antennas should I use for this to work?

From following this project (PiTxSDR)


and after watching this presentation (the RadioInstigator which builds on the previous project),


I was interested in building a RadioInstigator for a raspberry project that I want to build, but I had a few questions in regards to the parts and radio hardware that was used in this project. Down below is a quote from the author of the project which he lists all of the parts he used and bought,

This is a list of materials you will need to complete this tablet.

Please be aware, that since the product links are to a variety of auction sites, these prices **WILL** change. I also considered a few things as 0 cost. For example, USB cables are ubiquitious. We cut a few up.

I also have a large format 3d printer. You probably don't. I didn't include cost for printables, or nuts and bolts. I buy in quantity from Fastenal or McMaster Carr.

Total cost tally as of 17 Feb 2019: $157.50

-- 3d Printables --

0. The printables. I have my own printer. You need a full printable size of 200mm x 200mm to print these parts -- Electronics --

1. Raspberry Pi 3 B+ $36.00
https://www.ebay.com/itm/Raspberry-...WIFI-Motherboard-PC-Computer-NEW/232120229741
2. MicroSD card (salvaged from other projects) $0

3. PWRbar 10AH battery (purchased from Office Depot on sale) $5
https://www.officedepot.com/a/products/757106/PWR-Bar-10000-mAh-Micro-USB/
4. LCD Touchscreen $58.00
https://www.ebay.com/itm/7-Inch-1024-600-Capacitive-Touch-Screen-HDMI-TFT-LCD-Display-for-Raspberry-Pi/263427485642

5. RTL-SDR $9.50
https://www.aliexpress.com/item/Use...RTL2832-R820T-SDR-Digital-TV/32812258737.html
6. IS11-BT05 Bluetooth keyboard $20

7. Random USB wifi that Kali linux liked, junked find 0$

8. (OPTIONAL) CrazyRadio , allows easy keyboard mouse sniffing/injection for wide variety of hardware $8
https://www.ebay.com/itm/Crazyradio-2-4Ghz-nRF24LU1-USB-radio-dongle-with-antenna-for-Crzayflie-10DOF/231423427319

9. (OPTIONAL) (WARNING) GPS chip , bought on AliExpress for $10 but cannot find anywhere. Dealer no longer is there. -- Cables --

10. MCX to SMA adapter $4
https://www.ebay.com/itm/6-SMA-Fema...ght-RG316-cable-pigtail-US-Stock/111782431584
11. SMA female to jumper lead $2
https://www.ebay.com/itm/SMA-Female-Jack-W-Nut-Bulkhead-Pigtail-RF-Jumper-Cable-1-13mm-f-PCB-Board-10cm/253447841441

12. 50cm HDMI ribbon $8
https://www.ebay.com/itm/50cm-FPV-D...Male-to-Male-HDTV-FPC-Flat-Cable/163407521002
13. Pile of "donor" micro USB cables $0

14. SPST Switch. 11mm diameter. Radio Shack deal. $1 -- Antennas --

15. Really long wifi antenna found with above usb device 0$

16. 2 Antennas 50MHz-1200MHz $20
Ebay store closed... :/ I need a reliable source. This will likely balloon the budget.

17. (OPTIONAL) Log Peroidic Antenna $9.20
https://www.ebay.com/itm/15W-5-6dB-1-35-9-5GHz-UWB-Ultra-Wideband-Logarithmic-Period-Antenna/292695546650 -- Screws/Nuts --

18. M3X45 cap screws (X4)

19. M3 nut (x4)

20. M3X16 cap screws (X6)

21. M3 Heat set inserts, 4.3mm tall (X4)
https://www.mcmaster.com/94459A130NOTE: If you redesign the back cover for M3 nuts, you can use them instead. It won't look as finished, but will certainly work.

Although he lists most of the parts, there is some ambiguity on some parts, so I'll post a few links to some of the possible options that I found (for those interested also in this project),

1.)GPS
GPS Dead Reckoning Board - NEO-M8U (GNSS)
Link

or
Adafruit Ultimate GPS Breakout - 66 channel w/10 Hz updates - Version 3
Link 2

or
SparkFun GPS Breakout - ZOE-M8Q (Qwiic) (compatible with a Raspberry Pi, but no examples of code for using it directly connected to a Pi so you would need to write your own code)
Link 3

2.) Power Supply
Renogy 72000mAh Laptop Power Bank
Link

Krisdonia 50000mAh Laptop Power Bank
Link 2

MAXOAK Laptop Power Bank 185Wh/50000mAh(Max.130W) Portable Laptop Charger
Link 3

iMuto Portable Charger 30000mAh
Link 4

ROMOSS 30000mAh 18W Fast Charge
Link 5

3.) WIFI USB Dongle
KuWFi Dual Band Bluetooth 4.1 WiFi USB Adapter, Wireless AC 1200Mbps 5GHz WiFi USB 3.0 LAN Adapter High Gain Antenna Network Card for Windows Linux Systems
Link 1

Lemorele Wireless USB WiFi Adapter Bluetooth 4.2 5G/2.5G Dual Band Wireless Adapter AC 600Mbps Mini WiFi Dongle
Link 2

based on these parts and the ones I added, I'm still not sure what characteristics or qualities I should look for on the two antennas the author mentioned but could no longer find any other listings from the same ones or the seller. So my first question would be where could I find SMA type connector antennas like the one the author used for this project? And do these antennas have to be only receivers or also capable of transmitting (transceivers)?

I tried to create a simple schematics of the project, which I'll attach right here,
Wiring RF HACKER main schematic.png

As shown in the schematic diagram, I've used a green question mark "?" to indicate the areas that I am confused on, although I'm not completely sure on how well I created the schematics, which I used this image from the author, as well as looking up what each pin were for the Raspberry Pi 3 and from parts he included in his purchase listing,

Wiring RF HACKER reference.png

My second question is about the wires that connect the dongles to the antennas, as well as the type of connectors the RTL-SDR, and CrazyRadio have. Based on this reference image, it seems that the SMA Female Nut Bulkhead to MCX Male Straight RG316 cable, has it's SMA Female (jack) connector end connected to the SMA Male (plug) ends of the two antennas (which are the ones from the first question that I mentioned that I'm looking for), but attempting to look for some sort of datasheets for the RTL-SDR and the CrazyRadio dongles, to verify that they are MCX Female connectors which seems to be the case from the above reference image from the author, I had no luck finding that information for the RTL-SDR dongle other than the aliexpress page which has limited information in that regard, Aliexpress link for the RTL-SDR device, but I did find what seems to be a datasheet to that CrazyRadio device or a related one here,https://media.digikey.com/pdf/Data%20Sheets/Seeed%20Technology/114990112_Web.pdf, which on the bottom of page 2, under radio specifications, I believe it says that the connector for the CrazyRadio dongle isn't MCX female, but actually a RPSMA connector (I'm assuming a female). Is this correct? and would the SMA Female Nut Bulkhead to MCX Male Straight RG316 cable that the author recommends be the right cable for these dongles?

I'm sorry for the long post, but I hope that I covered everything that I possibly could and included as much information about this as possible if someone else was also interested in creating one of these devices.

Most information from this project could be found in the author's Gitlab page, which also includes the code and all other relevant information about this project,
Gitlab link
 
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  • #3
I can't tell after just skimming the above, but what in what bands (and with what powers) will this thing be transmitting? If all the radios are in receive only (for listening), it should be okay. But if you will be transmitting in any bands, you need to be sure to keep the power and harmonic content down and legal. Plus, unless you know what you are doing, whenever you transmit with one of those closely spaced radios, it will likely desense all of the other receivers...
 
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  • #4
jedishrfu said:
I assume its this article that has got you interested:

https://hackaday.com/2019/06/05/mobile-sigint-hacking-on-a-civilians-budget/

Nice find! I wasn't aware of that article until now, but I only learned of this project through the previous PiTxSDR where someone had reference to this newer project since the author of the first project hasn't been working on the PiTxSDR.
 
  • #5
berkeman said:
I can't tell after just skimming the above, but what in what bands (and with what powers) will this thing be transmitting? If all the radios are in receive only (for listening), it should be okay. But if you will be transmitting in any bands, you need to be sure to keep the power and harmonic content down and legal. Plus, unless you know what you are doing, whenever you transmit with one of those closely spaced radios, it will likely desense all of the other receivers...

Thank you for your informative response and important caveats! I was thinking about this point more prfoundly, on whether I only want to receive signals or also transmit, but because I had originally planned on including an FM-AM radio receiver (especially important distress signals), VHF maritime radio receiver, as well as GPS, as well as some transmitter devices that are able to communicate with your television for example, or allows you to transmit distress signals. Having looked for raspberry pi projects that included these elements, I found that the PiTxSDR included all of these bands which would allow me to compress all of these objectives and features and costs to just a few antennas dongles and the pi itself, which would allow me to also learn more about radio signals and frequencies, which I read is important for an individual to get a license and get some training as well which it doesn't seem to be that expensive to do.

But to answer your question, I'm not at all too sure yet since the author doesn't seem to mention those things in great detail, most of the information relating to this I believe is in the second video that I linked to as well as the Powerpoint file that's included in his Github page.

https://gitlab.com/crankylinuxuser/siginttablet/commit/5e84314bf0198c9d3e9cb90a9f589d5095a4931a
 
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  • #6
shushi_boi said:
which would allow me to also learn more about radio signals and frequencies, which I read is important for an individual to get a license and get some training as well which it doesn't seem to be that expensive to do.
Yes, it is pretty inexpensive to get your HAM radio license and start learning more about radios. Plus, there are lots of HAM radio clubs with members who are happy to help you learn. Go to the ARRL website that I link to in my footer, and do a search for Clubs and license exams in your area. The club folks will be happy to let you know your various options for learning the basics so that you can pass your exam, and get you started learning about all sorts of radio stuff. :smile:

www.arrl.org

1569607989118.png
 
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FAQ: RadioInstigator: Building a SIGINT

1. What is RadioInstigator and how does it work?

RadioInstigator is a device used for Signal Intelligence (SIGINT) operations. It works by intercepting and analyzing radio signals to gather information about communication networks and electronic devices.

2. What is the purpose of building a SIGINT device like RadioInstigator?

The purpose of building a SIGINT device like RadioInstigator is to gather intelligence on potential threats, monitor communication networks, and track electronic devices for security and defense purposes.

3. What are the key components needed to build a RadioInstigator?

The key components needed to build a RadioInstigator include a radio receiver, antenna, signal processor, and software for analysis and decoding of intercepted signals.

4. How does RadioInstigator differ from other SIGINT devices?

RadioInstigator differs from other SIGINT devices in its portability, as it can be easily carried and deployed in various locations. It also has a user-friendly interface and advanced signal processing capabilities.

5. Is it legal to build and use a device like RadioInstigator?

The legality of building and using a device like RadioInstigator depends on the laws and regulations of the country where it is being used. It is important to obtain proper authorization and follow ethical guidelines when conducting SIGINT operations.

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