After swap the power tube the problem still there so i swap the 2 driver tube and still the same
i then looking at the power circuit, find out that its the same circuit which i recently move the wifi router
Unplugged it then the noise is gone
A very stupid mistake
thank for helping me out with this
i then looking at the power circuit, find out that its the same circuit which i recently move the wifi router
Unplugged it then the noise is gone
A very stupid mistake
thank for helping me out with this