Something Different

[anomaly]

I heard that in the 1970's someone found out computers emit a weak radio signal when they're processing things, apparently back then someone was able to somehow program an old Altair computer to play a song on their AM radio in beeps and chirps. I think that sort of thing is really interesting and I'd like to recreate the experiment with modern computer equipment. I have an SDR radio (Model: R820T2 RTL2832U), but I don't know what frequency ranges to search for the RF coming from a computer. So I thought I should ask the community if anyone has an ideas for where I should begin? Or if any of you have one of those meters/detectors that might be able to point me in the right direction? Thanks in advance for your replies.

[alkinoy]

https://en.m.wikipedia.org/wiki/Van_Eck_phreaking

[rtlsdrblog]

Have a look at these posts, some interesting results can be obtained with just RTL-SDRs.

https://www.rtl-sdr.com/transmitting-rf ... n-your-pc/

https://www.rtl-sdr.com/tempestsdr-a-sd ... diated-rf/

[Rufty]

Well, there's the Raspberry Pi Fm transmitter:
https://www.raspberrypi.org/magpi/raspb ... ansmitter/