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

mulveling, I understand why some might not be particularly fond of Mullards, it is really a matter of taste and system match. I prefer somewhat loose vintage sound with silky highs and full bodied midrange. But perhaps even for me the full Mullard set-up would be too much of that. I will probably just stay with RCA blackplates for 12AU7 in the amp and Mullard lonplates for 12AX7 in the preamp.

So, RCA 12AX7 black plates from 50s are not microphonic, I understand, I might want to try them too instead of Mullards, though I would not anticipate the improvement, but who knows ?

mulveling, I see. I thought you had all VAC electronics, or this is your second system.

mulveling, did you compare various RCA blackplates from 50s to Raytheon blackplates from the same time period ? I really like the RCAs in the driver section and how they work together with 12AX7 Mullards in the preamp. I was thinking about trying both Raytheon blackplates and Mullard 12AU7 at some point, though there is no need really.