What is the proper shielding enclosure and measurement location (indoors/outdoors) for Geiger counter projects? Taking mine outside gives Chernobyl level readings , indoors is 0.15uSv/h (15-25 cpm)
.. so obviously direct sunlight affects the GM tube heavily, and it must be shielded. Good information here: https://www.gqelectronicsllc.com/forum/topic.asp?TOPIC_ID=4540