help please!

By javipuras, 2 October, 2013

Hello people. Could you help me? i finished assembling my stella amp and i´m not able to play at full gain. It starts sounding like a spaceship, but in the wrong way. Its a very disgusting pulsed noise. I checked the potentiometer is properly working. Any advice?

I also expected some more output. im giving 6 volts in the input. will the difference using 9 volts be noticeable?

i hope you guys can help me, i will appreciate it so much. Thanks!