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

RE: rectifier tubes.

Posted by Eli Duttman on May 22, 2017 at 13:49:25:
Try the series SS diode tweak plus a Sovtek 5AR4 in an appropriate amp. I think you'll be pleasantly surprised. No arcing and the B+ rail voltage is correct.

The cost of US made OS 5U4s continues to escalate. Only the GE 5U4GB remains "reasonably" priced. Russian and Chinese ST bottle 5U4s are garbage. Fortunately, the current production ElectroHarmonix (EH) 5U4GB is quite decent and it is not expensive.