Panax

Following on from Pt.1 - Here are some pictures of the battery compartment. You can see the terminals at the bottom pivot in the middle like a seesaw, also with one battery inserted and then with two. I couldn't resist and took out the tube to have a look at it. It is rather large, pictured below next to a STS-5 tube (SBM-20 equivalent.) ↑ Seesaw battery terminals with pivot at the center. ↑ ↑ One battery inserted. ↑ ↑ Two batteries inserted. The cap has a large shaft that pushes down on the positive terminal, the battery is pressed down making the seesaw terminal push the other battery up.

This is one of my latest Geiger counters and it is in fantastic condition. To say this is probably more than 60 years old, it has really faired well. It wasn't working when I got it as one of the battery terminals had some corrosion to it. After a quick but very awkward clean up of the terminal it came to life. What really attracted me to this, besides it's condition, is the fact the meter is in CPS (counts per second.) I thought it unusual for a small counter of this era to be in CPS. Being CPS would mean it would be sensitive, which it is, fairly so. The unit is complete as far as I can