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In Reply to: 12AU7 help,,,, posted by Merlot_cat on April 28, 2020 at 22:37:14:
Two RCA clear top exist. US made and made in Mexico. The USA made are superior, but rare. 12AU7 is not a great tube. RCA knew it and immediately made a more linear tube one year after the 12Au7 was released. It was called the 5814.
Best 12A7s are Brimar 13D5 long plate and CBS/Hytron 5814. Some Brimar 13D5 are labeled Pinnacle.
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Follow Ups
- RE: 12AU7 help,,,, - sony6060 05/2/2106:34:54 05/2/21 (1)
- RE: 12AU7 help,,,, - sony6060 06:58:56 05/3/21 (0)