u/KoLa04

I've got new radiacode device today (box was damaged but the device is working). I saw the calibration video about 1460keV in spectrum. But my spectrum is very flat above ~620 keV.

https://preview.redd.it/okbinoll8b1h1.png?width=1206&format=png&auto=webp&s=198be54871e0605a72bb7bb9a3852aaceb13cc9e