Medium gain power tubes causing buzz

Love Rhino · 449

0 Members and 1 Guest are viewing this topic.

Offline Love Rhino

  • Jr. Member
  • **
    • Posts: 42
on: January 01, 2020, 12:27:17 PM
So I have a crack with speedball set up, and when using low gain power tubes such as a 6as7g there are no issues with pretty much a huge variety of driver tubes.  However, when I switch to a 5998 or 421A I get a buzz around the 9 pm mark on the volume control when using 6sn7 tubes.  I also get a background tap tap tap sound with the 5998 when using 12au7 which isn’t present with the 6as7g.

I’m trying to figure out where to start addressing this but could use a sign post :).

Or I just use 6070 and 6as7g from now on!



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19364
Reply #1 on: January 01, 2020, 05:44:14 PM
The tap tap tap would be noise from a cell phone or nearby wireless appliance.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Love Rhino

  • Jr. Member
  • **
    • Posts: 42
Reply #2 on: January 02, 2020, 08:34:06 AM
Thank you!  That actually makes a lot of sense, I have a wireless router not too far away that I can move.  I’ll see if that helps both the tapping and the buzz at mid volume.