Anonymous ID: 40b6ba Dec. 11, 2022, 10:48 p.m. No.17927223   🗄️.is 🔗kun

>>17926866

On that Geiger counter and Sam-20 tube dealio, seems I see a lot of DIY kits for em

 

https://mightyohm.com/blog/2014/11/a-spotters-guide-to-the-sbm-20-geiger-counter-tube/