Static/Crackling sounds coming from a Diezel Herbert MK-II

[FallHammer]

Hello everyone,

Lately I've been hearing a Static/Cracking noise coming from the Amp when it is in the "Run" position.

-The noise doesn't change with Volume. It is only noticeable at "bedroom" levels.

-I've tried different outlets around the house to see if it a Electrical issue. No change.

- Tried different Speaker and Patch cables. No luck.

My best guess it is probably a PreAmp tube issue. This is my first time owning a Tube Amplifier. I've had the Amp for about 4 months. It looks easy enough to switch out preamp tubes. That being said, is there anything I should be aware of before hand before I switch out any tubes. Or, is there anything else I should trouble shoot before I go and buy some new tubes.

Thanks for taking the time to read and any insight would be very appreciated!

 

[borninwinter]

Most likely a tube, but the problem tube could also potentially be a power tube.

 

[1stylee]

I had the same problem a few years ago. There was an intermittent faint static/crackling sound and I suspected It was a bad preamp tube, and sure enough, it was. I still wouldn't rule out power tubes though, at least pre tubes are a little cheaper.

 

[jonl]

Check the preamp tube sockets. Make sure they haven't expanded, if they have close them up a bit for better connection to the tubes.

 

[Sigma.Xiria]

remember, before doing anything, please unplug the amplifier!!!!!!!

 

[cheftie]

With the amp running, turn the master volume all the way down. If you still hear the crackling it most probably is a bad power tube.