![Geiger counter with SBM20 tube](https://www.f4huy.fr/wp-content/uploads/2015/08/connectique.jpg)
I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, so, i have put this one inside a 32mm diam plastic tube,…
I “rebuild” my Geiger counter, the SBM-20 tube was initially inside the box, so, i have put this one inside a 32mm diam plastic tube,…