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

TV-7 tube tester line adjustment problem

Posted by Richard.Sun on July 3, 2012 at 10:00:19:
Hi, I have a TV-7 tester that I acquired 4 years ago, and today it shows a line adjustment problem. The meter needle can only reach 30, even I turn the line adj. control to the maximum level.

Given that the 5Y3 tube was replaced 2 years ago (when it wore out) and the 83 rectifier tube has been in its position for roughly 10 years, I suspect that the 83 rectifier tube may wear out as well; but unfortunately, I do not have another tester that allows me to test these tubes. Also, I am rather reluctant to send my tester to the technicians, as I will have to wait for weeks or even months to get my tester back.

My question is: could a weak / bad 83 rectifier tube cause the line adjustment problem? If so, I may buy a brand-new 83 rectifier tube to replace the old one, and see what will happen first.

Best regards,