Oscillating DoZ

[rchua77]

Hi Guys,

I have a slight problem with my DoZ oscillating. the R10 (Zobel network resistor) burns to a crisp when i'm trying to bias the Iq.

I have tried connecting a 22pF capacitor across the base and collector of Q1 (BC559) and it still oscillates.

Would the oscillation be caused by too many output stages ? I'm using 8 x MJ21196 BJTs with 0.2ohm emitter resistors. Strangely enough, the other channel bias fine and works perfectly.

Any suggestions would be greatly appreciated.

 

[UniQ]

Have U done any search?

Here is what I found when searching DoZ:

DOZ Smoking

ps: I have NOT red through that thread, thats your job! 😉

Go back to your amp and do some more trial and error and return back with results/questions, ok?! 🙂