Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.
You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.

You must login to use this feature.

Inmate Login

By default, logging in will set a session cookie that disappears when you close your browser. Clicking on the 'Remember my Moniker & Password' below will cause a permanent 'Login Cookie' to be set.

Moniker/Username: The Name that you picked or by default, your email. Forgot Moniker?	Examples "Rapper", "Bob W", "joe@aol.com".
Password:	Forgot Password?
	Remember my Moniker & Password ( What's this?)

If you don't have an Asylum Account, you can create one by clicking Here.

Our privacy policy can be reviewed by clicking Here.

Inmate Comments

From:
Your Email:
Subject:

Message Comments

Original Message

I'm not good with all of the terminology

Posted by Tre' on March 6, 2025 at 13:40:21:

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'