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What do you know and how do you like the RCA 5963 Black Plates?

I just rolled a nice set of 1957 RCA 5963 black plates with foil D getters.  I don't have many hours on them yet, but I was surprised at the sound quality and value for the price on the used market.  

I don't know much about this tube, other than it being a substitute for a 12AU7.  What do you know about them and how do you like them?

Thanks!
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Showing 1 response by lowrider57

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lowrider57
5,393 posts
 
The 1950’s RCA 5963 sounds more dynamic than the standard 12AU7 Blackplate, IMO. It’s also a low-noise tube.

The RCA 5814A is also a great Blackplate. My favorite is the 5814A JAN RCA triple Mica, a military grade tube.
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