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December 07, 2021, 01:03:15 PM

Author Topic: Medium gain power tubes causing buzz  (Read 263 times)

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Offline Love Rhino

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Medium gain power tubes causing buzz
« 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

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Re: Medium gain power tubes causing buzz
« 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

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Offline Love Rhino

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Re: Medium gain power tubes causing buzz
« 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.