If they test questionable then it really does not matter. That is not an acceptable "new" tube.
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There are alot of people selling tubes on ebay. The Phillips that I just purchased humm quite loud on my system. This does not mean they are fake just B stock or just bad. This happens. I got a great price and got bad stuff. I will stick to known sources for tubes, tubedepot and the like as they take bad stock back. Live and learn!