Batistiini
New Head-Fier
- Joined
- Sep 10, 2009
- Posts
- 2
- Likes
- 0
Hi
Im building my first cmoy amp and just tested it.
It sounds pretty good but i have one major problem.
When i unplug my cmoy from source(computer) my headphones start to scream very loudly and when i plug cmoy back screaming stops immediately.
Then i noticed that it only happens when ground of the cmoy doesnt touch sources ground. Im using 24v regulated wall power supply. I tried with 9v battery but it still screams but at lower volume.
I will post some pics tomorrow. I hope you can help.
Sorry for my bad english
.
Part list:
2 1000uF power caps
2 4,7k resistors
2 4,7k gain resistors
1 opa2134pa
2 10k resistors
2 0,47uF caps
pic1
pic2
pic3
pic4
edit: posted some pics
Im building my first cmoy amp and just tested it.
It sounds pretty good but i have one major problem.
When i unplug my cmoy from source(computer) my headphones start to scream very loudly and when i plug cmoy back screaming stops immediately.
Then i noticed that it only happens when ground of the cmoy doesnt touch sources ground. Im using 24v regulated wall power supply. I tried with 9v battery but it still screams but at lower volume.
I will post some pics tomorrow. I hope you can help.
Sorry for my bad english
Part list:
2 1000uF power caps
2 4,7k resistors
2 4,7k gain resistors
1 opa2134pa
2 10k resistors
2 0,47uF caps
pic1
pic2
pic3
pic4
edit: posted some pics