Uploaded December 2014 | Updated September 2026, 2 weeks ago
Checking function of the Dekatron counter by using the output of a Geiger counter and measuring the radioactivity of some Thorium lantern mantles. Brief look at an old 1955 Oscilloscope. Last calibrated in June 1970.
Checking function of the Dekatron counter by using the output of a Geiger counter and measuring the radioactivity of some Thorium lantern mantles. Brief look at an old 1955 Oscilloscope. Last calibrated in June 1970.










