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: Rectifer Tube Choice for easy on the other components.............

Posted by Eli Duttman on April 1, 2021 at 19:26:10:
Forward drop in 5Y3s is large. You may be hearing the reduction in B+ rail voltage.

If, as the schematic suggests, you're taking the "raw" B+ from pin 8 of the rectifier socket, try a Bendix/Red Bank 6106. It's a variation on the 5Y3 theme that is constructed with a cathode sleeve. Vacuum rectifiers with cathode sleeves exhibit slow B+ rail rise.

BTW, the original use for 6106s was in Nike SAM systems. Bendix/Red Bank is THE epitome of rugged and reliable.