K8077 subwoofer kit

Kits Audio Hi Fi Projects
1

Hello.
I have changed both transistors in my K8077 but still hava a high frequense noise.
I can`t find any shortcut.
Specially one of my transistors nr.142 gets warm. I have changed this one, but still have noise.
Where shall i begin in my search.

Per-Erik

2

Hi,

I had exactly the same issue and it was because I hadn’t mounted the R23 (don’t use the R61 for subwoofer applications)

Hope this will help anyone.

Regards,

Nicolas.