grabread
Active Member
I have been working on a solid state amp, it's now in working condition but there is a loud hum (AC)?
It is always present on both channels and is not altered with the volume control.
there is about 180mv of ac on each channel dc is only - 1.8 mv .
I have attached a couple of photos of the scope connected to the speaker teminal . one of just the AC ? wave and the second is with a 1khz tone on top of it.
I am thinking it is a capacitor problem any idea's?
many thanks.
It is always present on both channels and is not altered with the volume control.
there is about 180mv of ac on each channel dc is only - 1.8 mv .
I have attached a couple of photos of the scope connected to the speaker teminal . one of just the AC ? wave and the second is with a 1khz tone on top of it.
I am thinking it is a capacitor problem any idea's?
many thanks.