/rad/ General

>>1087909
>radios and radars
>pic: shit meant to prevent people from using radios
Great start.

>>1087912
Illegal in the us also.

>>1087928
>implying op is in the usa

I have an RTL SDR and I'm trying to copy garage door signals to see if they can be hacked, however I'm having no luck as I can't find the freuency at which they should be operating, any tips?

>>1087952
Get an anritsu spectrum analyzer. Pricy, but a great tool.

>>1087909
I deal with radios (vhf and mf/hf, mostly) and 4kw radars, and apart from nuking tv dishes the amount of fun one can have is limited.

>>1087952
https://www.youtube.com/watch?v=K2ZJDZVeheU

>>1087972
Each to their own mate

You boys heard of a bandwidth hijacker and a microphone?

>>1088000
Ayo lamayo trips

>>1087979
noice

>>1087909
I need to block gsm/edge/4g signals for about 20-30 minutes in a roughly 3-5 meter radius. How do?

>>1087961
>>>/b/
>>1087971
I've been using audacity to decode the signals, but I live in a city and I recieve around 20 possible signals each minute.
>>1087979
Nice

yowza!
this thread is hip and happening!

>>1087928
Legality depends on being caught.
I've used these before and have an old Warlock unit picked up from salvage.

The most fun I had was at Uni
> bloke upstairs kept on playing radio on religious nutjob AM channel.
> Had an old MrMicrophone AM transmitter made for kiddos
> couldn't bump up the output but did figure out how to create IM (Intermod) putting a Hard Rock channel over his.
> many lulz followed

>>1088000
Never heard of it. Mind elaborating?

>>1088121

what are they called? just RF blockers?

I have two recievers, a Uniden Bearcat 147XLT and a Regency ACT-T16K. They both seem to work fine, from antenna to programming, but when I enter a frequency in either, they don't output anything.
Because it's both, I imagine I'm doing something wrong. Is there some step I'm missing in between plugging the bastards in and programming a frequency to actually hear anything?

>>1088165
Jammers

There are several ways to cripple radios.
The easiest is broad spectrum/barrage
This is the same as firing up a tesla coil or a spark gap, just throws out so much noise it buries any intelligible signal. Downside is you have to put out a lot of power to cover any distance.

Narrow spectrum jammers are more finely tuned than the barrage jammer.

And at the "fun" end are jammers meant for specific applications like bluetooth, wifi, GSM, etc.

Depends on if you want to use a hammer or a scalpel. :)

There is a really good article on the Warlock fambly over on wired.com

https://www.wired.com/2011/06/iraqs-invisible-war/all/1

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>>1087909
I bought this 2 watt Freq. Jammer a couple years ago. It jammed everything from WIFI to 4-G and Blue Tooth. Great fun when some dumb fuck is texting and driving...sold it as it wasn't worth the risk