[removed]

You've got titanium nitride coated drillbits sitting on what looks like a velvet-like cloth. Titanium nitride is triboelectric. You're generating a shittonne of static electricity just by moving it around on the cloth from the triboelectric effect, every time you touch the two together it's discharging, producing a broadband source of RF.

I'm betting if you attached a ground wire to both drillbits and got rid of the cloth you'd see nothing or next to nothing.

[removed]

[removed]

Thanks for the reply. It's not my video but I might try seeing if I can replicate it later using a RTL-SDR or AM radio.

Hi, I am the owner of those videos and a new member of this forum. I will analize it more. It is strange effeck and works with any metal around the radio. So I think it is not the coating doing this effect.Looks like it is not static electricity effet, The time is too short in between sparks to get it re-charged.

the bottom drill bit is rolling around in the velvet, that's likely picking up charge.