Home
AudioAsylum Trader
Tubes Asylum

Questions about tubes and gear that glows. FAQ

For Sale Ads

FAQ / News

 

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


Login to access features only available to registered Asylum Inmates.
    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

Heathkit tube tester

Posted by 2bkurius on June 24, 2011 at 19:36:23:

I recently received an old Heathkit tube tester. I was testing some 300B tubes that were only a couple of years old and are only on a few hours a week. The tubes tested in the middle, neither good nor bad. I thought they would test better. The chart said to set the plate setting at 21? but if I moved the plate setting to 30? they tested good and when I moved it to 40? they tested 100 percent(?). Could someone tell me what this plate setting is adjusting and if this seems like a normal reading for a 300B that is only a couple of years old? Thanks in advance.