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#9
10-24-2009, 03:33 PM
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Hi John,
The Tesla spark procedure is a hand held HIgh frequency high voltage generator. It has a metal probe about 4 inches long by 1/2" diameter and tapered to apoint. The probe is placed against the neck of the tube, and if the tube is gassy, the neck of the tube will fluoresce. No fluorescence=good vacuum Crude, but for crt quality purposes, it is good enough. This is what it looks like http://sciencekit.com/high-frequency...l/p/IG0024295/ Bob
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Vacuum tubes are used in Wisconsin to help heat your house. New Web Site under developement ME http://AntiqueTvGuy.com 
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