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#11
11-06-2011, 01:16 AM
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No way a Tech would test all the tubes first thing, he'd have a pretty good idea what section the problem was in and start there.
As David mentioned the 5U4's would be the first on the list to test in this case, also a shorted filter would most likely take out the Heater in a 5U4 making it very obvious at a glance that it was bad. 
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