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#hackrf

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@cafkafk All I know is that #UHFSATCOM has been plagued with #PirateRadio transmissions abusing the 243 MHz area band #satellites as global repeater.

That's like 20+ year old #OSINT by now: Basically everyone with a #SDR like a #HackRF can send on those and for recieval some simple #UHF antenna and a DIY dish made out of chicken fence aimed at the GSO-bound satellites is all it takes...

  • OFC the #DoD will not like illegal transmissions but as per very nature it's trivial to recieve said messages for everyone who isn't lazy...

Does anybody have really bad interference problems with the HackRF?

Mine is pretty seriously susceptible to both broadcast FM and USB interference. Here is a screenshot showing the sheer amount of stray harmonics - receiving in most frequencies is extremely difficult and getting anything out of airband is impossible. I also get a lot of signal mirroring.

Could it be faulty? I did buy it off aliexpress after all. But just looking at it, it seems normal. I'm going to make a broadcast FM and possibly wifi bandstop filter anyway

Thinking about making my own SDR web server. I've got one main idea that I want to implement - replay. The user would be able to config a set of frequencies to listen on, and the server will record everything it hears. After a certain time period, say, a day, it'll flush everything for storage reasons, but this still allows a good buffer to go back and find whatever you wanted to go back and look at (kind of like a surveillance system).

Just having a normal one using a #hackrf looking in my ceiling for a device that does an RF chirp every couple of minutes. Forgot to take it out before insulation was installed and couldn't find it lifting insulation after the fact.

After 10-15mins of hunting, the first spot I put my hand got it!

I'd like to see a #FlipperZero do that (no really, can it? Would have been so much easier.)

Been meaning to receive signals from weather sattelites, so I bought a HackRF and an appropriate yagi. However, I now realise...the yagi has a a receive power of 25db, and the HackRF is only rated for 5db. So I need an attenuator.

I'm quite new to RF, but attenuators just involve a setup of resistors, right? So would making a variable one be as simple as just incorporating a potentiometer? or is it a little more complicated than that

#radio#hamradio#rf