Tubes Asylum

Questions about tubes and gear that glows. FAQ

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

Sylvania 6SN7GTB makes a big noise burst at turn on. Game over?

Posted by Quiet Earth on February 16, 2007 at 12:45:58:
Hello everyone,
I have a pair of NOS Sylvania 6sn7s that I have been using successfully for about a year. Recently, one of them makes a very loud, 2 second static burst when I turn the amp on. After that, it plays just fine. I interchanged the left and right 6SN7 in each amp and the noise burst moves to the other channel. I am confident that the tube is the cause of the problem. I also put my old 6sn7s back in and there is no such problem.
Anyway, I'm wondering if the noisy tube is still OK to use or if its problem indicates the onset of permanent failure. I would not want to damage my amp if the tube is on its way out. I just hate to scrap a tube if it's only a thermal/noise issue.
What do you think?