Uploaded July 2012 | Updated September 2026, 2 weeks ago

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I forced an RCA 811A tube to produce some X-rays by operating the tube in cold-cathode mode at about 20KV and 150uA. The glass fluoresces nicely, but I didn't get any light from my X-ray intensifier cassette.

MightyOhm's geiger counter kit: mightyohm.com/blog/products/geiger-counter