I never cared for sound the Raytheon 12ax7, maybe I never got a good one. That doesn't mean you won't like them. The only way you'll know for sure is try them in your equipment. Sorry if this doesn't help.
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I agree completely with Onhwy61, with emphasis on "but whether or not you like or care for its sound in a specific application is a whole other question". I love the sound of my 60's vintage Raytheons in my EAR phono stage. They have a clarity and purity throughout the frequency spectrum that is great, and that is lacking in even my overall faves the Telefunken smooth plates. Granted, the sound of my set-up is very full and not thin at all, so the Raytheons' sound is welcomed there. If you get the chance, checkout the Raytheon 7025's; similar with a little more meat on the bones.