Home
AudioAsylum Trader
Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

For Sale Ads

FAQ / News / Events

 

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

Odd hum issue - suggestions ??

Posted by rogerh113 on May 30, 2017 at 15:41:04:

I've been going through an amp to be my backup, and am stalled at an odd hum issue. Turn the amp on and it has a fairly loud hum. Touch the front panel, or any of the amp chassis, and it goes away. Run the amp ungrounded, and much (but not all) of the hum goes away.

I thought it might be a bad internal ground. Sure enough, the ground lead was secured at one of the inside foot screws. Of course, the chassis is enameled, so the ground lead was against enamel. Cleared the enamel, used a star washer, and re-secured the ground lead. No improvement - if anything, it is a bit worse. Except if you touch the chassis, in which case it still goes away.

Does anyone have any suggestions, or have encountered and solved something like this. I am assuming that it is something really simple...

regards -- Roger