Wow! Thanks for all the replies. There are some great suggestions here that I will try.
I agree that I can't fault a retailer for the bad tubes from a manufacturer knowing that several manufactures of tubes have quality control issues. But I cannot excuse a retailer when you pay them to pretest their tubes only to find that what they delivered is still bad (and probably not actually tested).
I agree that I can't fault a retailer for the bad tubes from a manufacturer knowing that several manufactures of tubes have quality control issues. But I cannot excuse a retailer when you pay them to pretest their tubes only to find that what they delivered is still bad (and probably not actually tested).