terataz

Uneven volume in amps??

Recommended Posts

Thank you all for the comments.

After trying numerous things, I've checked the tubes.

Apart from the 4 Svetlana, there's 4 smaller ones:

1x 12at7eh Electro-harmonics

1x 12au7A Electro-harmonics

2x Mullard M8136 cv4003

The amp requires 2x ecc82 and 2x ecc81, but from what I could find from the internet, the Mullard are ECC82, the 12at7eh is ECC81 and the 12au7a is an ECC82.

If this is correct, it looks like i was using and ECC81 in place of an ECC82.

Could this be the problem?

Share this post


Link to post
Share on other sites

Quite possibly depending on the circuit. Can you get a spare ecc81 to try In the right location?

Sent from my GT-I9195 using Tapatalk

Share this post


Link to post
Share on other sites

Just wanted to update all the kind members on the current status, and solution, of this matter.

The problem was in the tube: there was a 12au7a (ecc82) plugged into a ecc81 socket. After inserting the correct tube (12at7eh, ecc81), the amp started to sound fab. No more unbalancing.

As per the Croft, I'm still investigating but is becoming apparent (thanks to white noises & crackles) that one of the tube is toward the end of its life.

Thanks to everyone who contributed to this post. I've learned so much from it.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Recently Browsing   0 members

    No registered users viewing this page.