Thread: Precsion model 640 tube tester
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Old 09-26-2015, 04:42 PM
Olorin67 Olorin67 is offline
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Join Date: Feb 2014
Location: Milwaukee
Posts: 927
"Cathode conductance" on the front panel: Yep, its an emissions tester. Still good for checking for shorts and seeing if used tubes have life left in them.
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