@vinylvalet When I purchased from Viva Tubes, I saw they had no optional noise testing. So, when I placed the order I asked them to sort for noise. The tubes I received were unacceptable for noise. They ignored my emails asking for a refund. That’s why I don’t recommend them.
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That’s too bad. Good to know. I’ve bought several tubes over a year ago from multiple suppliers including Viva Tubes and they were responsive, previously.
Goes to show proper pre-testing and validation before shipping can be a game changer. Brent Jesse always properly tested my small signal tubes I got from him with a real curve tracer tester.