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I'm not good with all of the terminology

76.90.100.230

Tre'

In Reply to: RE: Hey Tre' posted by Story on March 06, 2025 at 04:48:30

On the left is the long and short plate Mullard 12ax7. On the right is the smooth and ribbed plate Telefunken 12ax7. In the middle is a newer Sylvania 12ax7. I know Sylvania made different 12ax7s but I've never listened carefully to any of them. Back in the day we used mostly Mullards and Telefunkens. I do remembering liking the black plate RCA 12ax7s.

I don't use 12ax7s in my system these days. I can sub a 12ax7 for a 6sl7 in my phono pre using this adapter if I want/need a little more gain.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

Edits: 03/06/25

Follow Ups:

RE: I'm not good with all of the terminology - Story 13:59:11 03/06/25 (1)
the one I found is like the middle tube (faded and screwed up Blue lettering), nothing else)

Got all kinds of other tubes, including RCA's, Tele's Etc.

This one Sylvania sounds really NICE

I also have plenty Octals of Sylvania's, never found a 9 pin before
- That is great to hear... - Tre' 14:19:11 03/06/25 (0)
  because I have about 100 NOS Sylvania 12ax7s, some with red paint and some with green paint, with that same plate structure.
  
  I think the blue paint was the last Sylvania tubes before ECG but I'm not sure.
  
  Tre'
  Have Fun and Enjoy the Music
  "Still Working the Problem"

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