Home made Nuclear War detector.
"If blue lamp is flashing check for nuclear war ..."

Polonium pen cocktail tester.

        http://www.techlib.com/science/ion.html#Neon as 
Resistor

Also, possibly more useful, DIY :

Ion chambers.

Radiation detectors

Modifying a CDV-716 survey meter.

Polonium pen (for testing your drinks for ex-KGB agent 
action)

HIGH! value resistors from neon lamps



Rest of site is also interesting.



        Russell


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