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Tom-s reacted to dpump's post in the thread The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.) with
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Another Tung-Sol date question. Black glass 6L6: 322030. Maybe 1950, week 30? -
Tom-s reacted to gibosi's post in the thread The Reference 6J5 Thread (L63, 6C5, 12J5, 6P5, etc.) with
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Actually, 322 is the EIA code for Tung-Sol and 030 is 1950, week 30. https://tubemaze.info/eia-codes-to-id-tubes/ IBM's inventory... -
Tom-s reacted to gibosi's post in the thread The Reference Pentode and Beam Tetrode Thread EL34, KT66, KT77, KT88, EL11, EL12, EL3N, EL35, EL37, 6550, 6L6, EL51, EL39, 4654, 4699, KT63, KT61, 6V6, etc with
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Yes, it is important to remember that some tubes were manufactured in the same factory for 10 or more years. And due to improvements in...
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