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In Reply to: RE: Are there any date codes on the tubes? The early Raytheons .... posted by Patster on December 29, 2007 at 20:34:46:
The two mica blackplate square getter (50's) are amoung the best 12Au7 variants. They are sweet and full bodied with good detail. The three mica blackplate square getter Raytheons (early sixties?) are speed and pace kings different tubes for different system balancing.
Bart
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Follow Ups
- RE: Are there any date codes on the tubes? The early Raytheons .... - posbwp55@msn.com 12/29/0723:23:19 12/29/07 (1)
- That generally matches my experience, too. I would add ... - PureAudio 05:59:30 12/30/07 (0)