|
Post by killerq on Oct 16, 2020 12:46:46 GMT
Hey, All, I am still loving this amp, and am always trying to learn about it. Today I noticed that when there is background noise, if I place my hand near the amp/tube or especially touch the tube, the background noice in my headphone increases a lot. I also noticed that if there is background noise that I hear, it goes away 99.99% if I touch both capacitors with my fingers like this: imgur.com/a/MeaxaZtDoes that mean there’s a other adjustment (power cord, etc) that I can make to eliminate that noise without having to touch the capacitors?
|
|
solderdude
Administrator
measureutternutter
Posts: 4,886
|
Post by solderdude on Oct 21, 2020 10:11:32 GMT
Hey, All, I am still loving this amp, and am always trying to learn about it. Today I noticed that when there is background noise, if I place my hand near the amp/tube or especially touch the tube, the background noice in my headphone increases a lot. I also noticed that if there is background noise that I hear, it goes away 99.99% if I touch both capacitors with my fingers like this: imgur.com/a/MeaxaZtDoes that mean there’s a other adjustment (power cord, etc) that I can make to eliminate that noise without having to touch the capacitors? This seems to be a groundloop issue. Most likely between the source feeding the DAC (USB from PC/laptop) and the power supply from the amplifier. I assume all devices are connected to the same 3-prong wall socket, if not try to do just that.
|
|