bzblues
Full Member level 1
Hello!
I've build this guitar amplifier kit. You can run it on a 9V battery or plug it with a DC adaptor. I'm using a 9V 1A (or 2A) adaptor but the problem is that when used, it makes a humming noise, like its not grounded, wich it is! and its very loud, but when I use tha bettery the hum dessapears of course.
Should I use another DC adaptor value? I'll attach the schemantis of the amp to see if its ussefull.
Thanks!
I've build this guitar amplifier kit. You can run it on a 9V battery or plug it with a DC adaptor. I'm using a 9V 1A (or 2A) adaptor but the problem is that when used, it makes a humming noise, like its not grounded, wich it is! and its very loud, but when I use tha bettery the hum dessapears of course.
Should I use another DC adaptor value? I'll attach the schemantis of the amp to see if its ussefull.
Thanks!