Help with ENGL Screamer 50

[Travis]

Hi everyone!

I have this issue with my engl screamer 50, I try to replace preamp tubes with new ones but the issue still there..

Some ideas ? Someone now is this is a typical issue?

Thanks everyone..

Link to the video:

20240820_174241.mp4

drive.google.com

 

[Travis]

Clean channel works fine

 

[Travis]

And If I turn on the lead boost the whistle is bigger

 

[Nostradoomus]

Troubleshooting

Tube Guitar Amp Troubleshooting

robrobinette.com

 

[Travis]

I try robrobinette troubleshooting but I didnt found the issue...

Someone with experiencie with engl can help me?

Thanks you all.

 

[Travis]

If helps the issue starts one day I play the amp with a guitar with a lot of feedback with the amp (p90s pickups)..

Since that the amp have the issue of the video

 

[andrewsrea]

The link did not work for me (page not found). Can you better describe the problem?

FYI: I've been repairing and build tube amps since the late 70's.

 

[Einzeln]

No link