Gamma Spectrometry Forum

Also, does anyone have a clue as to the nomenclature of this probe? Can't really make much sense of it...

Tom: I put photos up here. https://imgur.com/a/wsNrAeN Are there other photos you would like to see? My brother can chime in more on the testing, but suffice it to say, it was connected up to the Eberline (and my Ludlum, which is not calibrated in CPM) and was compared directly to the Exploranium. T...

I got this Harshaw 64 cubic inch scintillator off of eBay, where all good things come from. I tested it with an Eberline ASP-1 at 1000V, but haven't gotten the proportional background rate I expected for its volume. With its 64 cubic inch NaI(Tl) crystal, I read a background of 21,000 CPM. In compar...

My brother just introduced himself; I'm the EE he mentioned. I've been fascinated by Geiger counters ever since I started collecting civil defense memorabilia in the early 2000s. I remember saving my dollars to buy a NOS CD V-700 still sealed in the cardboard box. Still have it, though a lot has bee...