6H23 tube Ya or Na ?

I tried the 6H23-EB's that ASTI sells for $45 (matched pair) in both the line and phono stages of my Mod3A. They are quiet, and long lasting--just as others have noted. They turned out to be too bright for use in both line and phono sections in my system, though. I kept the 6H23's in the phono section (because that seems to be harder on tubes) and went to NOS Amperex E88CC's in the line stage.

I agree with the other poster on this thread who mentioned that the Amperexes tend to be a bit forward.

The Amperexes' smoothness, transparency, detail, and front-ish perspective in the line section combine well with the 6H23s' dynamics and mid-hall perspective (also said elsewhere) in the phono section.

What other folks have said about the 6H23 in the Mod3A is pretty much my experience--other than I find them to be too bright for the double section dosage. I noticed the the VTS tube list mentioned this in the notes for the 6H23's vis-a-vis the Mod3A.

They have also worked well in my BAT VK3i which uses 2 per channel in the line stage. Can't comment on longevity as the BAT is very easy on tubes, but they sounded fine.

i'm not using a modulus, but i am running 6h23eb's in my sp10. tonally there is no difference from my older sovteks. the 6h23's are a bit smoother and in my system just a tad noisier - they will not solve brightness problems if you have them. can't tell about longevity - in my amp the line tubes last, seemingly, forever.