A simple question for the knowledgeable. Are the NOS GE and RCA versions of the 7581a tubes of the same construction and quality as the ones made by Philips/Sylvania, or are these just rebrands of the Philips/Sylvania 7581a? I have the chance to buy NOS 7581a's for $60.00 a piece, but they're described as different brands with no more info. Would this be a risk top take?
7581a brands
- Thread starter Paw
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